Re: [meteorite-list] chondrite ungrouped
An ungrouped chondrite is a chondrite with properties that do not fit into the existing named groups. Right now, this means it is not an H, L, LL, R, CI, CM, CV, CO, CK, CH, CB, CR, EH, or EL chondrite. It is something different. There are many ungrouped carbonaceous chondrites, and number of ungrouped non-carbonaceous chondrites. When 2-3 ungrouped chondrites have similar properties, some people call this a grouplet. These may or may not have well-known names, e.g. K chondrites (of which there are 2). When 3-5 ungrouped chondrites have similar properties, somebody usually tries to define a new group. So in this sense, ungrouped is a temporary designation that will eventually get replaced when collections grow, either through meteorite falls or sample returns (assuming that the one and only asteroid of this type didn't hit the earth to produce a given ungrouped chondrite). Note also that a significant fraction of ungrouped chondrites that get submitted to the nomenclature committee do not get accepted as ungrouped chondrites. This is because ungroupiness is not well defined. Sometimes there is a fine line between something that belongs to a group, but has anomalous properties, and something that is different enough to get the label ungrouped. Even when something gets published as ungrouped in the Bulletin, you may later see publications that disagree... and vice versa. Jeff On 2/24/2013 9:58 PM, habibi abdelaziz wrote: hello , i wnat to ask here; what is chondrite ungrouped , is that mean anew grouped chondrite, something not classified before is there examples i got a classifcation as chondrite ungrouped just today thanks aziz habibi aziz box 70 erfoud 52200 morroco phone. 21235576145 fax.21235576170 __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Chelyabinsk classification
Hi, Sorry if I missed this, but do we know the classification of Chelyabinsk? __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Chelyabinsk 1.8 kg mass found
Wow!!! Thanks Martin for posting those. Absolutely stunning individual. Dare I compare it to the Venus Stone, in terms of aesthetic beauty! I hope the large individual stays in a museum. It is too beautiful to keep hidden from everyone. Date: Mon, 25 Feb 2013 15:04:58 +0100 To: meteorite-list@meteoritecentral.com From: karmaka-meteori...@t-online.de Subject: [meteorite-list] Chelyabinsk 1.8 kg mass found Chelyabinsk 1.8 kg mass found A beautiful specimen! http://image.tsn.ua/media/images2/original/Feb2013/383747428.jpg http://img1.1tv.ru/imgsize640x360/PR20130225151539.JPG http://www.apiural.ru/UserFiles/Storage/ContentPhoto/0/0/63/6343_original.jpg Martin Postfach fast voll? Jetzt kostenlos E-Mail Adresse @t-online.de sichern und endlich Platz für tausende Mails haben. http://www.t-online.de/email-kostenlos __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Chelyabinsk 1.8 kg mass found
Nice specimen...looks like it broke away earlier in hot flight and was well ablated. Graham On Mon, Feb 25, 2013 at 2:04 PM, karmaka karmaka-meteori...@t-online.de wrote: Chelyabinsk 1.8 kg mass found A beautiful specimen! http://image.tsn.ua/media/images2/original/Feb2013/383747428.jpg http://img1.1tv.ru/imgsize640x360/PR20130225151539.JPG http://www.apiural.ru/UserFiles/Storage/ContentPhoto/0/0/63/6343_original.jpg Martin Postfach fast voll? Jetzt kostenlos E-Mail Adresse @t-online.de sichern und endlich Platz für tausende Mails haben. http://www.t-online.de/email-kostenlos __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Chebarkul/Chelyabinsk - Trajectory Update - IAU release
I'm not sure if this was posted yet or not. It was just sent to the IAU yesterday. Electronic Telegram No. 3423 Central Bureau for Astronomical Telegrams INTERNATIONAL ASTRONOMICAL UNION CBAT Director: Daniel W. E. Green; Hoffman Lab 209; Harvard University; 20 Oxford St.; Cambridge, MA 02138; U.S.A. e-mail: cbatiau@... (alternate cbat@...) URL http://www.cbat.eps.harvard.edu/index.html Prepared using the Tamkin Foundation Computer Network TRAJECTORY AND ORBIT OF THE CHELYABINSK SUPERBOLIDE Jiri Borovicka, Pavel Spurny, and Lukas Shrbeny, Astronomical Institute of the Academy of Sciences, Ondrejov, Czech Republic, report that they have computed the atmospheric trajectory and velocity of the superbolide of 2013 Feb. 15.139 UT (3h20m UT), which caused some damage in the city of Chelyabinsk, Russia. They used seven casual video records provisionally calibrated with Google Maps tools. The trajectory was assumed to be linear. The geographical coordinates of selected points along the trajectory are as tabulated below: Relative Longitude Latitude Height Velocity Notes Time (s) (deg E) (deg N) (km) (km/s) 0.00 64.266 54.508 91.83 17.5 beginning of registration 9.18 61.913 54.788 41.02 17.5 minor flare 11.20 61.455 54.836 31.73 17.5 major flare 12.36 61.159 54.867 25.81 17.5 flare 13.20 60.920 54.891 21.05 12.5 minor flare 16.20 60.606 54.922 14.94 4.3 end of registration The observed trajectory was 254 km long. The azimuth of the trajectory was 279.5 degrees, and the slope was 16.5 degrees to the horizontal (for the end point). The uncertainty of the radiant is about one degree. The uncertainty of the position of the trajectory is about 1 km (at the beginning, up to 4 km). The pre-entry object that caused the superbolide was relatively fragile. Severe fragmentation started at a height of 32 km under dynamic pressure of 4 MPa. The mass of the largest fragment, which landed in the lake Chebarkul, was estimated to be 200-500 kg. One or two meteorites of the mass of several tens of kg can be expected not far from the village Travniki. One piece of mass approximately 1 kg may have landed to the northwest of Shchapino. Numerous small fragments can be expected in the wide band located about 5 km south of the trajectory, mostly between longitudes 60.9 and 61.35 degrees. The blast wave, which strongly affected Chelyabinsk, was generated between heights of 25 and 30 km. The radiant and heliocentric orbit were calculated to be as follows: Apparent radiant: Right ascension 328.6 +/- 1.0 deg (equinox 2000.0) Declination +8.0 +/- 1.0 deg Velocity 17.5 +/- 0.5 km/s Geocentric radiant: Right ascension 334.7 +/- 1.2 deg Declination -1.0 +/- 1.4 deg Velocity 13.2 +/- 0.7 km/s Orbit: a = 1.55 +/- 0.07 AU e = 0.50 +/- 0.02 q = 0.768 +/- 0.011 AU Q = 2.33 +/- 0.14 AU (equinox 2000.0) Peri. = 109.7 +/- 1.8 deg Node = 326.41 deg i = 3.6 +/- 0.7 deg The data do not allow determination of the initial mass of the object prior to entering the atmosphere. The trajectory will be further refined in the future, provided that proper in situ calibrations of the videos are made. NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars. (C) Copyright 2013 CBAT 2013 February 23 (CBET 3423) Daniel W. E. Green -- - Web - http://www.galactic-stone.com Facebook - http://www.facebook.com/galacticstone Twitter - http://twitter.com/GalacticStone Pinterest - http://pinterest.com/galacticstone RSS - http://www.galactic-stone.com/rss/126516 - __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Chebarkul/Chelyabinsk - Trajectory Update - IAU release
Now that is some detailed data! Thanks Mike. Looks like it is time to put some fresh magnets on the stick! Hunting season has started early! Go get 'em guys and gals! May the Schwartz be with you! Date: Mon, 25 Feb 2013 09:51:46 -0500 From: meteoritem...@gmail.com To: meteorite-list@meteoritecentral.com Subject: [meteorite-list] Chebarkul/Chelyabinsk - Trajectory Update - IAU release I'm not sure if this was posted yet or not. It was just sent to the IAU yesterday. Electronic Telegram No. 3423 Central Bureau for Astronomical Telegrams INTERNATIONAL ASTRONOMICAL UNION CBAT Director: Daniel W. E. Green; Hoffman Lab 209; Harvard University; 20 Oxford St.; Cambridge, MA 02138; U.S.A. e-mail: cbatiau@... (alternate cbat@...) URL http://www.cbat.eps.harvard.edu/index.html Prepared using the Tamkin Foundation Computer Network TRAJECTORY AND ORBIT OF THE CHELYABINSK SUPERBOLIDE Jiri Borovicka, Pavel Spurny, and Lukas Shrbeny, Astronomical Institute of the Academy of Sciences, Ondrejov, Czech Republic, report that they have computed the atmospheric trajectory and velocity of the superbolide of 2013 Feb. 15.139 UT (3h20m UT), which caused some damage in the city of Chelyabinsk, Russia. They used seven casual video records provisionally calibrated with Google Maps tools. The trajectory was assumed to be linear. The geographical coordinates of selected points along the trajectory are as tabulated below: Relative Longitude Latitude Height Velocity Notes Time (s) (deg E) (deg N) (km) (km/s) 0.00 64.266 54.508 91.83 17.5 beginning of registration 9.18 61.913 54.788 41.02 17.5 minor flare 11.20 61.455 54.836 31.73 17.5 major flare 12.36 61.159 54.867 25.81 17.5 flare 13.20 60.920 54.891 21.05 12.5 minor flare 16.20 60.606 54.922 14.94 4.3 end of registration The observed trajectory was 254 km long. The azimuth of the trajectory was 279.5 degrees, and the slope was 16.5 degrees to the horizontal (for the end point). The uncertainty of the radiant is about one degree. The uncertainty of the position of the trajectory is about 1 km (at the beginning, up to 4 km). The pre-entry object that caused the superbolide was relatively fragile. Severe fragmentation started at a height of 32 km under dynamic pressure of 4 MPa. The mass of the largest fragment, which landed in the lake Chebarkul, was estimated to be 200-500 kg. One or two meteorites of the mass of several tens of kg can be expected not far from the village Travniki. One piece of mass approximately 1 kg may have landed to the northwest of Shchapino. Numerous small fragments can be expected in the wide band located about 5 km south of the trajectory, mostly between longitudes 60.9 and 61.35 degrees. The blast wave, which strongly affected Chelyabinsk, was generated between heights of 25 and 30 km. The radiant and heliocentric orbit were calculated to be as follows: Apparent radiant: Right ascension 328.6 +/- 1.0 deg (equinox 2000.0) Declination +8.0 +/- 1.0 deg Velocity 17.5 +/- 0.5 km/s Geocentric radiant: Right ascension 334.7 +/- 1.2 deg Declination -1.0 +/- 1.4 deg Velocity 13.2 +/- 0.7 km/s Orbit: a = 1.55 +/- 0.07 AU e = 0.50 +/- 0.02 q = 0.768 +/- 0.011 AU Q = 2.33 +/- 0.14 AU (equinox 2000.0) Peri. = 109.7 +/- 1.8 deg Node = 326.41 deg i = 3.6 +/- 0.7 deg The data do not allow determination of the initial mass of the object prior to entering the atmosphere. The trajectory will be further refined in the future, provided that proper in situ calibrations of the videos are made. NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars. (C) Copyright 2013 CBAT 2013 February 23 (CBET 3423) Daniel W. E. Green -- - Web - http://www.galactic-stone.com Facebook - http://www.facebook.com/galacticstone Twitter - http://twitter.com/GalacticStone Pinterest - http://pinterest.com/galacticstone RSS - http://www.galactic-stone.com/rss/126516 - __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Chelyabinsk 1.8 kg mass found
Other photos of the specimen: http://rt.com/files/news/1e/20/c0/00/6.jpg http://rt.com/files/news/1e/20/c0/00/8.jpg http://rt.com/files/news/1e/20/c0/00/7.jpg source: http://rt.com/news/meteorite-rush-biggest-fragment-404/ Martin Von: karmaka karmaka-meteori...@t-online.de An: met-list meteorite-list@meteoritecentral.com Betreff: [meteorite-list] Chelyabinsk 1.8 kg mass found Datum: Mon, 25 Feb 2013 15:04:58 +0100 Chelyabinsk 1.8 kg mass found A beautiful specimen! http://image.tsn.ua/media/images2/original/Feb2013/383747428.jpg http://img1.1tv.ru/imgsize640x360/PR20130225151539.JPG http://www.apiural.ru/UserFiles/Storage/ContentPhoto/0/0/63/6343_original.jpg Martin Postfach fast voll? Jetzt kostenlos E-Mail Adresse @t-online.de sichern und endlich Platz für tausende Mails haben. http://www.t-online.de/email-kostenlos __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list Postfach fast voll? Jetzt kostenlos E-Mail Adresse @t-online.de sichern und endlich Platz für tausende Mails haben. http://www.t-online.de/email-kostenlos __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] NEO types
Hi Rob...thanks for that information.although I am confused now as I had always thought that most meteorites that had their orbits tracked had shown that they originated from the Asteroid belt...how does that fit with them being Aten or Apollo asteroids which orbit in a different zoneor am I just being thick? Graham On Mon, Feb 25, 2013 at 5:20 PM, Rob Matson mojave_meteori...@cox.net wrote: Hi Graham, By definition, all observed falls were either Apollo or Aten asteroids. Most are Apollos. You can see the break-down of the various NEO groups here: http://neo.jpl.nasa.gov/neo/groups.html Cheers! --Rob -Original Message- From: meteorite-list-boun...@meteoritecentral.com [mailto:meteorite-list-boun...@meteoritecentral.com] On Behalf Of Graham Ensor Sent: Monday, February 25, 2013 6:02 AM To: Tom Randall Cc: Meteorite list Subject: Re: [meteorite-list] Astronomers Calculate Orbit of Chelyabinsk Meteorite Are there any other observed falls that have had orbits calculated and originate from Apollo asteroids? On Mon, Feb 25, 2013 at 12:08 PM, Tom Randall tommy2...@hvc.rr.com wrote: An Apollo! http://bit.ly/XAFr9v Regards! Tom __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] NEO types
Graham, The Atens and the Apollos both have their aphelions within the asteroid belt where they originated. http://www.daviddarling.info/images/Apollos_Atens_Amors.jpg Michael in so. Cal. On Mon, Feb 25, 2013 at 9:42 AM, Graham Ensor graham.en...@gmail.com wrote: Hi Rob...thanks for that information.although I am confused now as I had always thought that most meteorites that had their orbits tracked had shown that they originated from the Asteroid belt...how does that fit with them being Aten or Apollo asteroids which orbit in a different zoneor am I just being thick? Graham On Mon, Feb 25, 2013 at 5:20 PM, Rob Matson mojave_meteori...@cox.net wrote: Hi Graham, By definition, all observed falls were either Apollo or Aten asteroids. Most are Apollos. You can see the break-down of the various NEO groups here: http://neo.jpl.nasa.gov/neo/groups.html Cheers! --Rob -Original Message- From: meteorite-list-boun...@meteoritecentral.com [mailto:meteorite-list-boun...@meteoritecentral.com] On Behalf Of Graham Ensor Sent: Monday, February 25, 2013 6:02 AM To: Tom Randall Cc: Meteorite list Subject: Re: [meteorite-list] Astronomers Calculate Orbit of Chelyabinsk Meteorite Are there any other observed falls that have had orbits calculated and originate from Apollo asteroids? On Mon, Feb 25, 2013 at 12:08 PM, Tom Randall tommy2...@hvc.rr.com wrote: An Apollo! http://bit.ly/XAFr9v Regards! Tom __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] NEO types
The Atens and the Apollos both have their aphelions within the asteroid belt where they originated. http://www.daviddarling.info/images/Apollos_Atens_Amors.jpg Most Atens and Apollos do, but there are a few exceptions. Asteroid 2012 DA14's orbit is very Earth-like, and does not cross into the main asteroid belt. In fact, 2012 DA14's orbit was changed enough by its close Earth flyby in February 15th, that its classification was changed from an Apollo to an Aten after the flyby. Ron __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Meteorite Picture of the Day Problems
Hello All. Recently, I've had one person report that he was not able to connect to the MPOD. He kept getting a 500 - page not found message. Also, there seem to be occassional hiccups with MPOD submissions. Over the last few months, several contributors had to re-send their pictures because I did not receive the original email. Have any of you experienced either of these problems? Thanks. Paul Swartz IMCA 5204 __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Casa Grande fireball meteorite classification (name pending)
Hi All, Here is the classification for the meteorite that was recovered from the June 1998 Casa Grande fireball. I just want to say thanks to several people. Rob Matson and Marc Fries for the Doppler radar work. Rob Ward who provided eyewitness information to aid in the radar work. Alan Rubin for doing the classification. Here are Alan's results. H5, S1, W0 olivine Fa 17.9±0.3 (n=16) low-Ca pyroxene Fs16.0±0.2 Wo1.5±0.2 (n=19) Ca-pyx Fs5.2 Wo47.0 (n=1) The chondrite has a few plagioclase grains up to 25 µm across. I hope to post a few more pictures on my webpage soon. Sonny __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Met Bulletin Update - 369 ANSMET 36(1) approvals and changes.
The ANSMET yield is Interesting from a statistical perspective. If anyone thinks NWA is not high-graded in Morocco, then think again! Makes you spoiled, darn! just Howardite -- I had hoped it was a Lunar Breccia or yet another pyroxene-phyric shergottite! LOL Carl Agee -- Carl B. Agee Director and Curator, Institute of Meteoritics Professor, Earth and Planetary Sciences MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 Tel: (505) 750-7172 Fax: (505) 277-3577 Email: a...@unm.edu http://meteorite.unm.edu/people/carl_agee/ On Mon, Feb 25, 2013 at 10:39 AM, Galactic Stone Ironworks meteoritem...@gmail.com wrote: Hi Bulletin Watchers, Lots of new ANSMET approvals in the Bulletin today - http://www.lpi.usra.edu/meteor/metbull.php?sea=sfor=namesants=falls=valids=stype=containslrec=50map=gebrowse=country=Allsrt=namecateg=Allmblist=Allrect=phot=snew=1pnt=Normal%20tabledr=page=1 Tons of OC's, but also many achondrites and interesting stones in the mix. Some detailed write-ups and lots of good photos. :) Best regards, MikeG -- - Web - http://www.galactic-stone.com Facebook - http://www.facebook.com/galacticstone Twitter - http://twitter.com/GalacticStone Pinterest - http://pinterest.com/galacticstone RSS - http://www.galactic-stone.com/rss/126516 - __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] The NASA Comet ISON Observing Campaign
http://sungrazer.nrl.navy.mil/index.php?p=ison The NASA Comet ISON Observing Campaign In November 2013, comet C/2012 S1 (ISON) will pass the Sun at just 0.012AU (~1.1-million kilometers above the solar surface), classifying it as a Sungrazing Comet, and potentially a spectacular one! Comet ISON is still very far away, and thus it remains difficult to predict exactly how bright the comet will become in November. However, there does exist the potential for this to be one of the brightest comets of the past century. To that end, NASA has requested a small committee of cometary experts to be formed to coordinate an observing campaign for this comet, under the assumption that it will become easily-visible by the latter part of 2013. The individual members of the team are listed at the bottom of this page. Campaign Goals The goals of this NASA campaign, and thus of the CIOC Team, are to assist both ground and space-based NASA observatories, and private observatories around the world, in obtaining the most scientifically useful observations of comet ISON. Sungrazing comets are unique objects that experience the most extreme thermal and gravitation forces our solar system has to offer them. However, rarely do we get to see these objects more than a few hours before their demise. Comet ISON offers us the rare opportunity to study a Sungrazer in great detail, for an extended period, and place it in the context of other comets. Observing Sungrazers, particularly as they get close to the Sun, can require a different approach from a scientific stand-point. Also, many of NASA space-based observatories and spacecraft are not designed or intended to observe comets, but nonetheless have imaging and spectroscopic capabilities that can be adapted to this task, and return valuable and unique science results. We have already contacted several major observatories and space missions asking for their support of the cometary community in observing ISON, and as November draws near we will post individual observing plans online. Note that the purpose of this Campaign is to facilitate, support and encourage the scientific community to pool its resources towards a common goal or target, and promote ongoing ISON observing plans at a high level. To pursue specific observing campaigns, please contact the individual observatories mentioned below. To apply for research funding support, please contact the NASA PATM and PAST and NEO programs, or the NSF AAG program. We would like the entire cometary and solar community to have access to all available observing data. At the very least, there is a great benefit in collecting and posting representative nightly results from the different observing teams. This should help observers plan their next runs and quickly understand any important changes for the comet. Thus it is the desire of the CIOC that all data and observations are made immediately and publicly available online for use by the scientific community. However, this is at the discretion of the individuals and missions involved, and is not controlled by the CIOC Team. Which missions and observatories are involved? We are still in the process of talking to programs, but as of right now there are several that are accepting proposals for observations. Specifically, proposals are being accepted by the Keck Observatory, InfraRed Telescope Facility, National Solar Obervatory, Big Bear Solar Observatory, Hubble Space Telescope. The National Science Foundation is also enthusiastic about observers proposing to study ISON. For space-based mission, observing campaigns are planned by the SOHO, STEREO and SDO solar missions; by Spitzer, Chandra and Hubble space telescopes; and by the Deep Impact, JUNO, Mercury MESSENGER, Mars Odyssey and Mars Reconnaisance Orbiter missions. Other missions at or on Mars are looking into observing ISON, as are a handful of other NASA Planetary missions. We welcome and encourage our international partners to contact us and join in the fun! Where can I get more information about Comet ISON? And about the Campaign? We will soon be posting a comprehensive guide to ISON, so please keep checking back for that. There are several useful websites you can follow to keep up with the latest brightness estimates for Comet ISON. In particular we recommend Seiichi Yoshida's ISON page http://www.aerith.net/comet/catalog/2012S1/2012S1.html, the Minor Planet Center's (MPC) Ephemerides page http://scully.cfa.harvard.edu/cgi-bin/returnprepeph.cgi?d=co=CK12S010, the MPC's Comet ISON page, and the Comets-ml Mailing List http://tech.groups.yahoo.com/group/comets-ml/ (which is about comets in general, not just ISON). For other ISON updates, and for the latest updates about the ISON Observing Campaign, you can follow the @SungrazerComets http://twitter.com/SungrazerComets Twitter Feed. Once we establish a dedicated website for the ISON Campaign, we will point to it from this page. We also plan to establish a mailing list for
[meteorite-list] Chelyabinsk Main Mass Guess
My guess is that the largest piece will weigh 21 kilograms. I will go further and guess over 1,200 kilograms will be recovered this Spring when the snow melts. Happy Hunting, Adam __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] NEO types
But the diagram does not show the Aten group's orbit intersecting the asteroid belt?. Graham On Mon, Feb 25, 2013 at 5:48 PM, Michael Mulgrew mikest...@gmail.com wrote: Graham, The Atens and the Apollos both have their aphelions within the asteroid belt where they originated. http://www.daviddarling.info/images/Apollos_Atens_Amors.jpg Michael in so. Cal. On Mon, Feb 25, 2013 at 9:42 AM, Graham Ensor graham.en...@gmail.com wrote: Hi Rob...thanks for that information.although I am confused now as I had always thought that most meteorites that had their orbits tracked had shown that they originated from the Asteroid belt...how does that fit with them being Aten or Apollo asteroids which orbit in a different zoneor am I just being thick? Graham On Mon, Feb 25, 2013 at 5:20 PM, Rob Matson mojave_meteori...@cox.net wrote: Hi Graham, By definition, all observed falls were either Apollo or Aten asteroids. Most are Apollos. You can see the break-down of the various NEO groups here: http://neo.jpl.nasa.gov/neo/groups.html Cheers! --Rob -Original Message- From: meteorite-list-boun...@meteoritecentral.com [mailto:meteorite-list-boun...@meteoritecentral.com] On Behalf Of Graham Ensor Sent: Monday, February 25, 2013 6:02 AM To: Tom Randall Cc: Meteorite list Subject: Re: [meteorite-list] Astronomers Calculate Orbit of Chelyabinsk Meteorite Are there any other observed falls that have had orbits calculated and originate from Apollo asteroids? On Mon, Feb 25, 2013 at 12:08 PM, Tom Randall tommy2...@hvc.rr.com wrote: An Apollo! http://bit.ly/XAFr9v Regards! Tom __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] 'Vulcan' and 'Cerberus' Win Pluto Moon Naming Poll
http://www.space.com/19943-pluto-moons-name-poll-vulcan.html 'Vulcan' and 'Cerberus' Win Pluto Moon Naming Poll by Miria Kramer space.com 25 February 2013 The votes are in, and it looks like 'Vulcan' could be the new name for one of Pluto's smallest moons. After weeks of online ballot casting by people around the world, the poll asking the public to name two of Pluto's moons - currently called P4 and P5 - ended today (Feb. 25). As of 12 p.m. (1700 GMT), the polls closed with a total of 450,324 total votes cast since Feb. 11 with 'Vulcan,' a Pluto moon name proposed by Star Trek's William Shatner, is the clear winner. 174,062 votes and Vulcan came out on top of the voting for the naming of Pluto's moons. Thank you to all who voted! MBB, wrote Shatner via Twitter. Cerberus came in a clear second with nearly 100,000 votes. Vulcan was a late addition to the Pluto moon name contenders, and pulled into the lead after Shatner, building on his Capt. James T. Kirk persona, plugged the name on Twitter. Vulcan, the home planet of Kirk's alien-human hybrid first officer Spock, is not just a fictional world in the Star Trek universe. It is also the name of the god of fire in Roman mythology, and officials at SETI added the sci-fi favorite to the ballot for that reason. Vulcan is the Roman god of lava and smoke, and the nephew of Pluto. (Any connection to the Star Trek TV series is purely coincidental, although we can be sure that Gene Roddenberry read the classics.), wrote SETI scientist Mark Showalter in a blog officially adding the name to the list on Feb. 12. Thanks to William Shatner for the suggestion! These votes don't necessarily mean that P4 and P5 will end up being called Vulcan and Cerberus, however. SETI is going to recommend the winning names to the International Astronomical Union - the organization responsible for naming the moons. The IAU will take the results into consideration, but ultimately they have final say over what the tiny moons are called. Pluto has five moons that astronomers currently know of. Scientists first caught sight of Pluto's largest moon Charon in 1978, but it was not until 2005 that astronomers discovered two other moons (Nix and Hydra) using the Hubble Space Telescope. The moon P5 was discovered in 2012, also using the Hubble telescope . The moon P4 was discovered in 2011. Both P4 and P5 are only 15 to 20 miles (20 to 30 km) in diameter. __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] NEO orbits
Hi Graham, Keep in mind that asteroid orbits are dynamic, and that most of the Apollos, Amors and Atens of today once had their aphelia between Mars and Jupiter. Planetary perturbations and resonances over the millenia caused those orbits to evolve into earth-crossing (or in the case of Amors, earth-approaching) orbits. --Rob -Original Message- From: meteorite-list-boun...@meteoritecentral.com [mailto:meteorite-list-boun...@meteoritecentral.com] On Behalf Of Graham Ensor Sent: Monday, February 25, 2013 11:05 AM To: Michael Mulgrew Cc: Meteorite list Subject: Re: [meteorite-list] NEO types But the diagram does not show the Aten group's orbit intersecting the asteroid belt?. Graham __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] NEO orbits
Thanks Robso the named groups at the moment just represent similar orbiting asteroids which over time have settled into that orbit over time after they were nudged from the asteroid belt and over time will likely migrate further for reasons similar to the recent near miss which has changed it's orbit and caused it to move groups? Graham On Mon, Feb 25, 2013 at 7:13 PM, Matson, Robert D. robert.d.mat...@saic.com wrote: Hi Graham, Keep in mind that asteroid orbits are dynamic, and that most of the Apollos, Amors and Atens of today once had their aphelia between Mars and Jupiter. Planetary perturbations and resonances over the millenia caused those orbits to evolve into earth-crossing (or in the case of Amors, earth-approaching) orbits. --Rob -Original Message- From: meteorite-list-boun...@meteoritecentral.com [mailto:meteorite-list-boun...@meteoritecentral.com] On Behalf Of Graham Ensor Sent: Monday, February 25, 2013 11:05 AM To: Michael Mulgrew Cc: Meteorite list Subject: Re: [meteorite-list] NEO types But the diagram does not show the Aten group's orbit intersecting the asteroid belt?. Graham __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] NEOSSat Successfully Launched
http://www.spaceflightnow.com/news/n1302/25pslv/ Ocean monitor, smartphone satellite launched from India BY STEPHEN CLARK SPACEFLIGHT NOW February 25, 2013 India's workhorse Polar Satellite Launch Vehicle lifted seven satellites into orbit Monday, bolstering global ocean research, space surveillance, and taking miniature technology to new heights. The 145-foot-tall rocket blasted off at 1231 GMT (7:31 a.m. EST) from the Satish Dhawan Space Center on India's east coast, where it was 6:01 p.m. local time. The expendable four-stage launcher climbed into a sun-splashed evening sky, initially flying southeast over the Bay of Bengal, and then turning south to bypass Sri Lanka and ascend into space over the Indian Ocean. The four-stage PSLV launched in a core-alone configuration without the assistance of strap-on boosters. The mission's seven payloads were deployed in orbit 490 miles above Earth in less than 22 minutes, wrapping up the PSLV's 23rd mission and its 19th success in a row. Indian President Pranab Mukherjee was in the launch control center, observing the launch and congratulating the Indian Space Research Organization on the success. The PSLV has become a household name in our country, and this mission will only reaffirm this position with its accuracy [and] reliability, Mukherjee said. Our launch capabilities have been widely recognized all over the world with ISRO increasingly launching satellites from other countries. Among the rocket's passengers: The first asteroid-hunting satellite, a French-Indian ocean research craft, a small spacecraft built around a smartphone, a Canadian space surveillance satellite, two Austrian mini-telescopes, and a CubeSat built by students in Denmark. The 900-pound SARAL satellite, equipped with a Ka-band altimeter to measure the height of ocean waves, separated first from the Indian booster and unfurled its solar panels moments later. Jointly developed by France and India, the SARAL mission will bounce radar waves off ocean and ice surfaces to measure topography, pulling back the curtain on ocean circulation and giving scientists insights into its role in global climate. The radar signal will measure the height of waves with an accuracy of just a few inches, a feat similar to measuring the thickness of paper lying on the ground from the top of a skyscraper, according to scientists. SARAL's Ka-band antenna, built by Thales Alenia Space and funded by France, will be activated Tuesday and immediately begin collecting data, but the system will not be fully operational until spring, when SARAL reaches its final orbit and engineers declare the instrument healthy, according to Pierre Sengenes, the mission's project manager at CNES, the French space agency. France's investment in SARAL was about $126 million, Sengenes told Spaceflight Now. India's budget for SARAL, which covered the satellite bus and launcher, was not disclosed. SARAL joins the U.S.-French Jason 2 satellite, which also measures ocean topography from orbit. But SARAL flies in a different orbit than Jason 2, which launched in 2008. And SARAL's high-frequency Ka-band radar offers twice the spatial resolution of Jason 2's altimeter, giving researchers better data in coastal zones. The type of data collected by SARAL will be exactly the same as Jason 2, said Amandine Guillot, SARAL project scientist at CNES. But we can mention that thanks to its inclination, SARAL will collect data over ice sheets. Sea-surface terrain can be used to chart currents, water temperatures, tides, and ocean eddies, scientists say. Forecasters use ocean topography data in computer models predicting weather and climate on time scales ranging from a few days to more than a year. SARAL also carries a communications package named ARGOS to collect observations from a network of ocean buoys and ground stations providing in situ data on wave height, period, water and air temperature, and other conditions. Six smaller satellites rode the Polar Satellite Launch Vehicle as secondary payloads. Canada's NEOSSat satellite is the first space telescope designed to search for hazardous Earth-crossing asteroids. The $24 million NEOSSat mission will scan the sky for asteroids lurking near Earth, including objects orbiting close to the sun, making their discoveries challenging for traditional ground-based telescopes. Engineers outfitted the suitcase-sized satellite with a baffle to allow the telescope to point closer to the sun than other observatories. Astronomers will try to pick out asteroids as they streak through a matrix of stars, potentially detecting up to a dozen 500-meter, or 1,640-foot, asteroids each month, plus scores of smaller objects. You can find more details on NEOSSat in our complete story http://www.spaceflightnow.com/news/n1302/23neossat/ on the mission. Canada's $65 million Sapphire satellite was also aboard the PSLV for Monday's launch. Sapphire is Canada's first operational military satellite, and its
[meteorite-list] Large Meteorite Fragments Found in Russia (including a 1.8 kg fragment)
http://www.telegraph.co.uk/science/space/9893534/Large-meteorite-fragments-found-in-Russia.html Large meteorite fragments found in Russia The Telegraph (United Kingdom) February 25, 2013 Russian scientists on Monday hailed the finding of what they said was the largest yet fragment of a meteorite that came crashing through the skies over Siberia and exploded over Russia's Ural Mountains last week. The find was among a large number of fragments brought back from the Federal University of the Urals by a ski expedition team. We haven't been able count [the fragments], but we believe it's more than 100, said Victor Grokhovsky, member of the meteorite committee at the university. But the most significant among them was a fragment, which Masha PInkova found yesterday evening, not even 24 hours ago, that weighs 1.8 kilograms, he explained. It's the largest fragment of this meteor that we have found to this day. The meteorite hurtled above the Siberian city of Chelyabinsk on February 15, leaving behind a *plume of smoke as it tore through the atmosphere frightening residents with terrifyingly loud sonic booms. Locals said they saw a big meteorite fall into ice-covered Chebarkul Lake leaving a 20ft-wide hole in the ice. __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Casa Grande fireball meteorite classification (name pending)
Fantastic job to all of you - pretty cool achievement!! Can you share the current total of pieces/weights found? Would be a nice addition to an Arizona collection... Happy hunting, Mark From: wahlpe...@aol.com wahlpe...@aol.com To: meteorite-list@meteoritecentral.com Sent: Monday, February 25, 2013 11:13 AM Subject: [meteorite-list] Casa Grande fireball meteorite classification (name pending) Hi All, Here is the classification for the meteorite that was recovered from the June 1998 Casa Grande fireball. I just want to say thanks to several people. Rob Matson and Marc Fries for the Doppler radar work. Rob Ward who provided eyewitness information to aid in the radar work. Alan Rubin for doing the classification. Here are Alan's results. H5, S1, W0 olivine Fa 17.9±0.3 (n=16) low-Ca pyroxene Fs16.0±0.2 Wo1.5±0.2 (n=19) Ca-pyx Fs5.2 Wo47.0 (n=1) The chondrite has a few plagioclase grains up to 25 µm across. I hope to post a few more pictures on my webpage soon. Sonny __ Visit the Archives at http://www.meteorite-list-archives.com/ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Lab Instruments Inside Curiosity Eat Mars Rock Powder
http://www.jpl.nasa.gov/news/news.php?release=2013-072 Lab Instruments Inside Curiosity Eat Mars Rock Powder Jet Propulsion Laboratory February 25, 2013 PASADENA, Calif. - Two compact laboratories inside NASA's Mars rover Curiosity have ingested portions of the first sample of rock powder ever collected from the interior of a rock on Mars. Curiosity science team members will use the laboratories to analyze the rock powder in the coming days and weeks. The rover's Chemistry and Mineralogy (CheMin) and Sample Analysis at Mars (SAM) instruments received portions of the sample on Friday and Saturday, Feb. 22 and 23, respectively, and began inspecting the powder. Data from the instruments have confirmed the deliveries, said Curiosity Mission Manager Jennifer Trosper of NASA's Jet Propulsion Laboratory, Pasadena, Calif. The powder comes from Curiosity drilling into rock target John Klein on Feb. 8. One or more additional portions from the same initial sample may be delivered to the instruments as analysis proceeds. During a two-year prime mission, researchers are using Curiosity's 10 science instruments to assess whether the study area in Gale Crater on Mars ever has offered environmental conditions favorable for microbial life. More information about Curiosity is online at: http://www.jpl.nasa.gov/msl , http://www.nasa.gov/msl and http://mars.jpl.nasa.gov/msl/ . You can follow the mission on Facebook at: http://www.facebook.com/marscuriosity and on Twitter at http://www.twitter.com/marscuriosity . Guy Webster 818-354-6278 Jet Propulsion Laboratory, Pasadena, Calif. guy.webs...@jpl.nasa.gov 2013-072 __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] two fireballs
http://www.youtube.com/watch?feature=endscreenv=dBvotWfR3j4NR=1 26 seconds in on this video you clearly see two fireballs with the second one catching up to and impacting the first one. The first one makes a shockwave and area behind it with less air pressure. the shock wave at over 10k mph is like a brick wall and acts like a funnel. Like following an 18 wheel semi truck too close to save gas. when the truck hits its brakes the suv behind it impacts. and kaboom. Meteors donT HAVE BRAKES AND CANT CHANGE VECTORS. So when the first piece is slowed down the following ones catch up. Cheers Steve Dunklee __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Chelyabinsk 1.8 kg mass found - 105 year period?
Hi Martin, Thanks for this link: source: http://rt.com/news/meteorite-rush-biggest-fragment-404/ in which someone commented: Every 105 years? 1803 L'Aigle, 1908 Tungusta, 2013 Chelyabinsk, 2118? Being a meteorite newbie I didn't recognise the first reference, but found: http://en.wikipedia.org/wiki/L%27Aigle_%28meteorite%29 In the early afternoon of 26 April 1803 a meteorite shower of more than 3000 fragments fell upon the town of L'Aigle in Normandy (France). . . . The L'Aigle event was a real milestone in the understanding of meteorites and their origins because at that time the mere existence of meteorites was harshly debated, if they were recognised their origin was controversial, with most commentators agreeing with Aristotle that they were terrestrial, and witnessed meteorite falls were treated with great skepticism. It is a L6 type ordinary chondrite. - Robin __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] two fireballs
Hi Steve, A clearer view of the two main fireballs can be found at: http://www.youtube.com/watch?v=gQ6Pa5Pv_io I suggest switching to full-screen and starting the player at 4:30. This is an animated GIF which goes back and forwards continually over that part of the video, making the two fireballs and I think three trailing objects much easier to see. http://postimage.org/image/zdzm79g95/ - Robin __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] two fireballs
You are confusing optical aberrations for what is happening physically. Not only are there no components of the fireball colliding with other components, but no shock wave structures are apparent, either. Analyzing very bright point sources in video is difficult, as there are lens reflections, lens distortion, and various sensor artifacts. It's hard to actually locate the center of the meteor from such data. Chris *** Chris L Peterson Cloudbait Observatory http://www.cloudbait.com On 2/25/2013 5:56 PM, Steve Dunklee wrote: http://www.youtube.com/watch?feature=endscreenv=dBvotWfR3j4NR=1 26 seconds in on this video you clearly see two fireballs with the second one catching up to and impacting the first one. The first one makes a shockwave and area behind it with less air pressure. the shock wave at over 10k mph is like a brick wall and acts like a funnel. Like following an 18 wheel semi truck too close to save gas. when the truck hits its brakes the suv behind it impacts. and kaboom. Meteors donT HAVE BRAKES AND CANT CHANGE VECTORS. So when the first piece is slowed down the following ones catch up. Cheers Steve Dunklee __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Chelyabinsk 1.8 kg mass found - 105 year period?
2118? Did you have to mention Aphophis? Cheers Steve Dunklee --- On Tue, 2/26/13, Robin Whittle r...@firstpr.com.au wrote: From: Robin Whittle r...@firstpr.com.au Subject: Re: [meteorite-list] Chelyabinsk 1.8 kg mass found - 105 year period? To: karmaka karmaka-meteori...@t-online.de Cc: meteorite-list@meteoritecentral.com Date: Tuesday, February 26, 2013, 12:58 AM Hi Martin, Thanks for this link: source: http://rt.com/news/meteorite-rush-biggest-fragment-404/ in which someone commented: Every 105 years? 1803 L'Aigle, 1908 Tungusta, 2013 Chelyabinsk, 2118? Being a meteorite newbie I didn't recognise the first reference, but found: http://en.wikipedia.org/wiki/L%27Aigle_%28meteorite%29 In the early afternoon of 26 April 1803 a meteorite shower of more than 3000 fragments fell upon the town of L'Aigle in Normandy (France). . . . The L'Aigle event was a real milestone in the understanding of meteorites and their origins because at that time the mere existence of meteorites was harshly debated, if they were recognised their origin was controversial, with most commentators agreeing with Aristotle that they were terrestrial, and witnessed meteorite falls were treated with great skepticism. It is a L6 type ordinary chondrite. - Robin __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] two fireballs
[Note: frame references refer to my attached disassembly] Hello Chris and all, I agree: I don't see any impact event, certainly no shockwave is visible in the bright frames. I see the object of interest traveling away from the camera on a steep angle and, between blooming and DCT errors, obscuring itself. The digital iris tries its darndest to figure out what to do with itself, and actually makes some pretty good decisions around frame 63 giving us some pretty nice images. There certainly does appear, however, to be more than one parallel path suggesting more than one component of the mass by frame 65/66. There's also some pretty good sized component being shed earlier. Chris, have a look at frames 64-80 in this disassembly to see if you concur. The following is my disassembly of that video with strictly the relevant frames. No post-processing has been done, simply brought the original MP4 container down, decompressed the 1920x1080p/20fps transport into raw 8bit 4:2:0 YUV frames [the native frames], and mapped them into lossless 24bit PNGs. The video as I pulled it is an MPEG 4.2 container with AVC, High L4.0 Profile, VBR @ 4.714-9.011Mbps, 20fps constant, progressive 4:2:0 YUV 16:9 encoding. One reframe, GOP M=1,N=40. The original timecode is branded: UTC 2013-02-14 04:06:50, but there's no way of knowing how accurately the DVRs clock was maintained. 105 frames contained, ~102MB here: http://www.spaceballoon.org/chelyabinsk-meteor-frames-from-dash.zip Fair Use is assumed, and all rights are retained by their original holder. Best Regards, --- Jodie Monday, February 25, 2013, 5:05:46 PM, you wrote: You are confusing optical aberrations for what is happening physically. Not only are there no components of the fireball colliding with other components, but no shock wave structures are apparent, either. Analyzing very bright point sources in video is difficult, as there are lens reflections, lens distortion, and various sensor artifacts. It's hard to actually locate the center of the meteor from such data. Chris *** Chris L Peterson Cloudbait Observatory http://www.cloudbait.com On 2/25/2013 5:56 PM, Steve Dunklee wrote: http://www.youtube.com/watch?feature=endscreenv=dBvotWfR3j4NR=1 26 seconds in on this video you clearly see two fireballs with the second one catching up to and impacting the first one. The first one makes a shockwave and area behind it with less air pressure. the shock wave at over 10k mph is like a brick wall and acts like a funnel. Like following an 18 wheel semi truck too close to save gas. when the truck hits its brakes the suv behind it impacts. and kaboom. Meteors donT HAVE BRAKES AND CANT CHANGE VECTORS. So when the first piece is slowed down the following ones catch up. Cheers Steve Dunklee __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list -- Best regards, Jodiemailto:spacero...@spaceballoon.org __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] two fireballs
HI Yall I have a problem with this paragraph. The following is my disassembly of that video with strictly the relevant frames. No post-processing has been done, simply brought the original MP4 container down, decompressed the 1920x1080p/20fps transport into raw 8bit 4:2:0 YUV frames [the native frames], and mapped them into lossless 24bit PNGs. Most dash cams are 15fps and 640x280 not 1080p hd high resolution. especially considering the highest resolution youtube uses is 720p. Nice snow job. was pmg not mp4 Cheers Steve --- On Tue, 2/26/13, Jodie Reynolds spacero...@spaceballoon.org wrote: From: Jodie Reynolds spacero...@spaceballoon.org Subject: Re: [meteorite-list] two fireballs To: Chris Peterson c...@alumni.caltech.edu Cc: meteorite-list@meteoritecentral.com Date: Tuesday, February 26, 2013, 1:51 AM [Note: frame references refer to my attached disassembly] Hello Chris and all, I agree: I don't see any impact event, certainly no shockwave is visible in the bright frames. I see the object of interest traveling away from the camera on a steep angle and, between blooming and DCT errors, obscuring itself. The digital iris tries its darndest to figure out what to do with itself, and actually makes some pretty good decisions around frame 63 giving us some pretty nice images. There certainly does appear, however, to be more than one parallel path suggesting more than one component of the mass by frame 65/66. There's also some pretty good sized component being shed earlier. Chris, have a look at frames 64-80 in this disassembly to see if you concur. The following is my disassembly of that video with strictly the relevant frames. No post-processing has been done, simply brought the original MP4 container down, decompressed the 1920x1080p/20fps transport into raw 8bit 4:2:0 YUV frames [the native frames], and mapped them into lossless 24bit PNGs. The video as I pulled it is an MPEG 4.2 container with AVC, High L4.0 Profile, VBR @ 4.714-9.011Mbps, 20fps constant, progressive 4:2:0 YUV 16:9 encoding. One reframe, GOP M=1,N=40. The original timecode is branded: UTC 2013-02-14 04:06:50, but there's no way of knowing how accurately the DVRs clock was maintained. 105 frames contained, ~102MB here: http://www.spaceballoon.org/chelyabinsk-meteor-frames-from-dash.zip Fair Use is assumed, and all rights are retained by their original holder. Best Regards, --- Jodie Monday, February 25, 2013, 5:05:46 PM, you wrote: You are confusing optical aberrations for what is happening physically. Not only are there no components of the fireball colliding with other components, but no shock wave structures are apparent, either. Analyzing very bright point sources in video is difficult, as there are lens reflections, lens distortion, and various sensor artifacts. It's hard to actually locate the center of the meteor from such data. Chris *** Chris L Peterson Cloudbait Observatory http://www.cloudbait.com On 2/25/2013 5:56 PM, Steve Dunklee wrote: http://www.youtube.com/watch?feature=endscreenv=dBvotWfR3j4NR=1 26 seconds in on this video you clearly see two fireballs with the second one catching up to and impacting the first one. The first one makes a shockwave and area behind it with less air pressure. the shock wave at over 10k mph is like a brick wall and acts like a funnel. Like following an 18 wheel semi truck too close to save gas. when the truck hits its brakes the suv behind it impacts. and kaboom. Meteors donT HAVE BRAKES AND CANT CHANGE VECTORS. So when the first piece is slowed down the following ones catch up. Cheers Steve Dunklee __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list -- Best regards, Jodie mailto:spacero...@spaceballoon.org __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] BC NS Canada Meteors 25FEB2013 (AD)
Dear List, BC NS Canada Meteors 25FEB2013 Post link: http://lunarmeteoritehunters.blogspot.jp/2013/02/canada-meteor-events-25feb2013.html Sites for bookmarking: http://thelatestworldwidemeteorreports.blogspot.jp/ http://mbiq.blogspot.jp/ http://lunarmeteoritehunters.blogspot.jp/ http://meteoritestick.blogspot.jp/ http://theepistlesofpaul.blogspot.jp/ http://asteroidneosreportsworldwide.blogspot.jp/ http://tomphillipsrockart.blogspot.jp/ http://blaine-reed-meteorites.blogspot.jp/ http://fallenstarhunters.blogspot.jp/ http://inseki-japan.blogspot.jp/ Thank you for your kind support. If you find any of the above sites useful please do bookmark the sites. Dirk Ross...Tokyo __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] two fireballs
Hello Steve, I have more than 70 patents in the space in nineteen countries. I'm the Chief Technology Officer for a company that designs and sells digital video surveillance equipment -- I sell close to 30,000 systems a year. My masters degrees are in mathematics and electrical engineering with an emphasis on optical physics, and I've been in the digital video space inventing compression algorithms for more than two dozen years. So, yeah, let's go ahead and investigate my snow job, shall we? Most cheap dash cameras being imported now are 1080p/30. 1080p/20 is a favored option to maximize SD card usage. They differ from ATSC in that they don't generally support 1080p/60. For Example: http://www.amazon.com/1080P-Dashboard-Camera-Accident-Vision/dp/B0099KGDQ2 http://www.rakuten.com/prod/new-real-hd-1080p-h264-5m-car-dashboard-camera-recorder-accident-dvr/225640553.html?listingId=174887992 http://www.espow.com/product_info.php?products_id=50672currency=USDgsc=googleshoppinggclid=CMfrtJmH07UCFYKDQgodMSoAAQ http://www.ebay.com/itm/Full-Car-DVR-HD-1080P-Cam-Recorder-Camcorder-Vehicle-Dashboard-Camera-F900LHD-/251182177426?pt=US_Surveillance_Digital_Video_Recorders_Cardshash=item3a7b9fdc92 http://www.ebay.com/itm/Car-DVR-HD-1080P-Cam-Recorder-Camcorder-Vehicle-Dashboard-Camera-Hot-Sale-/330840799556?pt=US_Surveillance_Digital_Video_Recorders_Cardshash=item4d07a5f944 http://www.ebay.com/itm/GPS-FULL-HD-1080P-Car-Camera-DVR-GPS-Logger-Vehicle-Black-Box-Video-Recorder-/320741840995?pt=US_Surveillance_Digital_Video_Recorders_Cardshash=item4aadb41863 No dash cameras have been produced for public consumption at sub-D1 in at least five years. Mobile DVRs will often offer CIF for multiple channel recording however (a limitation of the NTSC or PAL scan converter). 640x280 is a non-existent format, as that would be 0.4375, not ending on a byte boundary. You're thinking of 240 lines. And it wouldn't be 640 (square pixels), it would be 704. Or perhaps you're thinking of SIF in a 525 line domain, which would be 352x240, or CIF in the 625 line domain (352x288). The container format was, in fact, MP4. The codec used for compression was AVC. AVC is aka MPEG4 AVC (Advanced Video Codec), which is also known as h.264 **see below. The original submitted video was 1080p. Youtube has offered 1080p since 2009. http://youtube-global.blogspot.com/2009/11/1080p-hd-comes-to-youtube.html We can see the offered streams from youtube as/per: http://www.spaceballoon.org/available-streams.jpg There is no such video container or codec as pmg that I'm aware of - Would you provide the FOURCC for that? My stills are in PNG (Portable Network Graphics) as I noted originally. __MPG__ is the Motion Pictures expert Group [of which I've been a member off-and-on as well as on several working groups over the years), and MPEG1, MPEG2, MPEG4, MPEG AVC (aka h.264, aka MPEG7 aka MPEG4 Layer 7, etc.) are all possible with additional qualifications of things such as differing levels of motion prediction, different transport layers, and different containers. Now, would you like to say anything else incredibly stupid, or would you like to apologize for attacking me in your blind ignorance and we can just let it go? **Format : MPEG-4 Format profile : Base Media / Version 2 Codec ID : mp42 File size: 348 MiB Duration : 10mn 1s Overall bit rate mode: Variable Overall bit rate : 4 860 Kbps Encoded date : UTC 2013-02-14 04:06:40 Tagged date : UTC 2013-02-14 04:06:40 gsst : 0 gstd : 601210 gssd : BADC23F61HH1361841351562120 gshh : r1---sn-p5qlsn7z.c.youtube.com Video ID : 1 Format : AVC Format/Info : Advanced Video Codec Format profile : High@L4.0 Format settings, CABAC : Yes Format settings, ReFrames: 1 frame Format settings, GOP : M=1, N=40 Codec ID : avc1 Codec ID/Info: Advanced Video Coding Duration : 10mn 1s Bit rate : 4 714 Kbps Maximum bit rate : 9 011 Kbps Width: 1 920 pixels Height : 1 080 pixels Display aspect ratio : 16:9 Frame rate mode : Constant Frame rate : 20.000 fps Color space : YUV Chroma subsampling :
Re: [meteorite-list] two fireballs
Hi Jodie: Fantastic images! Thanks for the converted files. I would never have realized that there was so much there! Murray On Mon, Feb 25, 2013 at 9:01 PM, Jodie Reynolds spacero...@spaceballoon.org wrote: Hello Steve, I have more than 70 patents in the space in nineteen countries. I'm the Chief Technology Officer for a company that designs and sells digital video surveillance equipment -- I sell close to 30,000 systems a year. My masters degrees are in mathematics and electrical engineering with an emphasis on optical physics, and I've been in the digital video space inventing compression algorithms for more than two dozen years. So, yeah, let's go ahead and investigate my snow job, shall we? Most cheap dash cameras being imported now are 1080p/30. 1080p/20 is a favored option to maximize SD card usage. They differ from ATSC in that they don't generally support 1080p/60. For Example: http://www.amazon.com/1080P-Dashboard-Camera-Accident-Vision/dp/B0099KGDQ2 http://www.rakuten.com/prod/new-real-hd-1080p-h264-5m-car-dashboard-camera-recorder-accident-dvr/225640553.html?listingId=174887992 http://www.espow.com/product_info.php?products_id=50672currency=USDgsc=googleshoppinggclid=CMfrtJmH07UCFYKDQgodMSoAAQ http://www.ebay.com/itm/Full-Car-DVR-HD-1080P-Cam-Recorder-Camcorder-Vehicle-Dashboard-Camera-F900LHD-/251182177426?pt=US_Surveillance_Digital_Video_Recorders_Cardshash=item3a7b9fdc92 http://www.ebay.com/itm/Car-DVR-HD-1080P-Cam-Recorder-Camcorder-Vehicle-Dashboard-Camera-Hot-Sale-/330840799556?pt=US_Surveillance_Digital_Video_Recorders_Cardshash=item4d07a5f944 http://www.ebay.com/itm/GPS-FULL-HD-1080P-Car-Camera-DVR-GPS-Logger-Vehicle-Black-Box-Video-Recorder-/320741840995?pt=US_Surveillance_Digital_Video_Recorders_Cardshash=item4aadb41863 No dash cameras have been produced for public consumption at sub-D1 in at least five years. Mobile DVRs will often offer CIF for multiple channel recording however (a limitation of the NTSC or PAL scan converter). 640x280 is a non-existent format, as that would be 0.4375, not ending on a byte boundary. You're thinking of 240 lines. And it wouldn't be 640 (square pixels), it would be 704. Or perhaps you're thinking of SIF in a 525 line domain, which would be 352x240, or CIF in the 625 line domain (352x288). The container format was, in fact, MP4. The codec used for compression was AVC. AVC is aka MPEG4 AVC (Advanced Video Codec), which is also known as h.264 **see below. The original submitted video was 1080p. Youtube has offered 1080p since 2009. http://youtube-global.blogspot.com/2009/11/1080p-hd-comes-to-youtube.html We can see the offered streams from youtube as/per: http://www.spaceballoon.org/available-streams.jpg There is no such video container or codec as pmg that I'm aware of - Would you provide the FOURCC for that? My stills are in PNG (Portable Network Graphics) as I noted originally. __MPG__ is the Motion Pictures expert Group [of which I've been a member off-and-on as well as on several working groups over the years), and MPEG1, MPEG2, MPEG4, MPEG AVC (aka h.264, aka MPEG7 aka MPEG4 Layer 7, etc.) are all possible with additional qualifications of things such as differing levels of motion prediction, different transport layers, and different containers. Now, would you like to say anything else incredibly stupid, or would you like to apologize for attacking me in your blind ignorance and we can just let it go? **Format : MPEG-4 Format profile : Base Media / Version 2 Codec ID : mp42 File size: 348 MiB Duration : 10mn 1s Overall bit rate mode: Variable Overall bit rate : 4 860 Kbps Encoded date : UTC 2013-02-14 04:06:40 Tagged date : UTC 2013-02-14 04:06:40 gsst : 0 gstd : 601210 gssd : BADC23F61HH1361841351562120 gshh : r1---sn-p5qlsn7z.c.youtube.com Video ID : 1 Format : AVC Format/Info : Advanced Video Codec Format profile : High@L4.0 Format settings, CABAC : Yes Format settings, ReFrames: 1 frame Format settings, GOP : M=1, N=40 Codec ID : avc1 Codec ID/Info: Advanced Video Coding Duration : 10mn 1s Bit rate : 4 714 Kbps Maximum bit rate : 9 011 Kbps Width: 1 920 pixels Height
Re: [meteorite-list] two fireballs
Thanks Murray, This is definitely one of the more interesting videos I've seen. Very raw, high resolution, and the camera was just in the exact right position to show us why there were two lurking trails. I really enjoyed this video. Watching the bolide approach in the reflection of the little Sport-Cross (VW?) [Frames 15-44 inclusive] with that kind of detail just isn't something a standard-definition camera would have offered. There was enough attenuation in that reflection from the tint that the iris freaking out didn't impact the value. Anyway - my pleasure! That's got to be a once in a lifetime opportunity! --- Jodie Monday, February 25, 2013, 8:18:41 PM, you wrote: Hi Jodie: Fantastic images! Thanks for the converted files. I would never have realized that there was so much there! Murray On Mon, Feb 25, 2013 at 9:01 PM, Jodie Reynolds spacero...@spaceballoon.org wrote: Hello Steve, I have more than 70 patents in the space in nineteen countries. I'm the Chief Technology Officer for a company that designs and sells digital video surveillance equipment -- I sell close to 30,000 systems a year. My masters degrees are in mathematics and electrical engineering with an emphasis on optical physics, and I've been in the digital video space inventing compression algorithms for more than two dozen years. So, yeah, let's go ahead and investigate my snow job, shall we? Most cheap dash cameras being imported now are 1080p/30. 1080p/20 is a favored option to maximize SD card usage. They differ from ATSC in that they don't generally support 1080p/60. For Example: http://www.amazon.com/1080P-Dashboard-Camera-Accident-Vision/dp/B0099KGDQ2 http://www.rakuten.com/prod/new-real-hd-1080p-h264-5m-car-dashboard-camera-recorder-accident-dvr/225640553.html?listingId=174887992 http://www.espow.com/product_info.php?products_id=50672currency=USDgsc=googleshoppinggclid=CMfrtJmH07UCFYKDQgodMSoAAQ http://www.ebay.com/itm/Full-Car-DVR-HD-1080P-Cam-Recorder-Camcorder-Vehicle-Dashboard-Camera-F900LHD-/251182177426?pt=US_Surveillance_Digital_Video_Recorders_Cardshash=item3a7b9fdc92 http://www.ebay.com/itm/Car-DVR-HD-1080P-Cam-Recorder-Camcorder-Vehicle-Dashboard-Camera-Hot-Sale-/330840799556?pt=US_Surveillance_Digital_Video_Recorders_Cardshash=item4d07a5f944 http://www.ebay.com/itm/GPS-FULL-HD-1080P-Car-Camera-DVR-GPS-Logger-Vehicle-Black-Box-Video-Recorder-/320741840995?pt=US_Surveillance_Digital_Video_Recorders_Cardshash=item4aadb41863 No dash cameras have been produced for public consumption at sub-D1 in at least five years. Mobile DVRs will often offer CIF for multiple channel recording however (a limitation of the NTSC or PAL scan converter). 640x280 is a non-existent format, as that would be 0.4375, not ending on a byte boundary. You're thinking of 240 lines. And it wouldn't be 640 (square pixels), it would be 704. Or perhaps you're thinking of SIF in a 525 line domain, which would be 352x240, or CIF in the 625 line domain (352x288). The container format was, in fact, MP4. The codec used for compression was AVC. AVC is aka MPEG4 AVC (Advanced Video Codec), which is also known as h.264 **see below. The original submitted video was 1080p. Youtube has offered 1080p since 2009. http://youtube-global.blogspot.com/2009/11/1080p-hd-comes-to-youtube.html We can see the offered streams from youtube as/per: http://www.spaceballoon.org/available-streams.jpg There is no such video container or codec as pmg that I'm aware of - Would you provide the FOURCC for that? My stills are in PNG (Portable Network Graphics) as I noted originally. __MPG__ is the Motion Pictures expert Group [of which I've been a member off-and-on as well as on several working groups over the years), and MPEG1, MPEG2, MPEG4, MPEG AVC (aka h.264, aka MPEG7 aka MPEG4 Layer 7, etc.) are all possible with additional qualifications of things such as differing levels of motion prediction, different transport layers, and different containers. Now, would you like to say anything else incredibly stupid, or would you like to apologize for attacking me in your blind ignorance and we can just let it go? **Format : MPEG-4 Format profile : Base Media / Version 2 Codec ID : mp42 File size: 348 MiB Duration : 10mn 1s Overall bit rate mode: Variable Overall bit rate : 4 860 Kbps Encoded date : UTC 2013-02-14 04:06:40 Tagged date : UTC 2013-02-14 04:06:40 gsst : 0 gstd : 601210 gssd : BADC23F61HH1361841351562120 gshh : r1---sn-p5qlsn7z.c.youtube.com Video ID
[meteorite-list] Minor Planet families
Hi Graham, Thanks Robso the named groups at the moment just represent similar orbiting asteroids which over time have settled into that orbit over time after they were nudged from the asteroid belt ... The asteroid belt is a pretty broad term. Between the orbits of Mars and Jupiter are over a dozen major named families (e.g. Cybele, Eos, Eunomia, Flora, Hilda, Hungaria, Koronis, Maria, Nysa, Phocaea, Themis, Main Belt I, Main Belt II, Main Belt IIb, Main Belt IIIa, Main Belt IIIb). It's not unlike the naming of different meteorite groups: just as all H-chondrites share common features, each asteroid family has a particular combination of orbital elements (semi-major axis and inclination are the primary determinants of a minor planet's family) that distinguish it from its neighbors. --Rob __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Meteorite Picture of the Day
Today's Meteorite Picture of the Day: Unclassified NWA Contributed by: Bob Evans http://www.tucsonmeteorites.com/mpod.asp __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
