Re: [meteorite-list] possible Alabama lunar meteorite fall

2018-11-18 Thread Bill Cooke via Meteorite-list
bit (most likely) or lunar ejecta (much less likely, but not impossible). Bill Cooke NASA Meteoroid Environment Office (Sent from my iPad) > On Nov 18, 2018, at 4:01 PM, Anne Black via Meteorite-list > wrote: > > Randy, Rob, > > What makes you think that it could be a Luna

Re: [meteorite-list] Maximum theoretical Earth impact velocity

2014-04-14 Thread Bill Cooke
s, good for statistical work, but individual examples should be used with care. Regards, Bill Cooke On Apr 14, 2014, at 2:54 PM, "Matson, Rob D." wrote: > Hi Chris/Shawn/All, > > There is obviously something squirrely going on in that generated orbit. > For one thing, lo

[meteorite-list] Deep penetrating fireball observed over middle Tennessee last night - June 8, 01:48:12 AM EDT

2012-06-08 Thread Bill Cooke
speed: 22.2 km/s Initial speed: 24.5 km/s Speed at loss of track: 9.5 km/s Tisserand parameter of 3.4 indicates an asteroidal origin More details, including movies and composites, can be found at http://fireballs.ndc.nasa.gov/20120608.html Bill Cooke NASA Meteoroid Environments Office Marshall Space