Hello Rob, Thanks for the very interesting link. I always enjoy your posts to The List. Please keep 'em coming!
Best wishes, Robert Woolard --- On Fri, 8/27/10, Matson, Robert D. <[email protected]> wrote: > From: Matson, Robert D. <[email protected]> > Subject: [meteorite-list] Beautiful time-lapse movie showing the growth in > discovered minor planets since 1980 > To: "Meteorite Central" <[email protected]> > Date: Friday, August 27, 2010, 12:34 PM > Hi All, > > Here is a fascinating video graphically showing the > exponential growth > in > discovered minor planets over the last 30 years. At the > beginning of > 1980, > the count stood at 8954. It's now over half a million! > > http://www.youtube.com/watch?v=S_d-gs0WoUw > > In this time-lapse video, as new minor planets are > discovered, they are > highlighted in white. You'll notice that the majority of > the discoveries > follow the earth around in its orbit (since most > discoveries are made at > opposition). > > In the 1990s, the big surveys start to come online, and the > discovery > rates skyrocket. In 2010, a new pattern of discoveries > starts to show up > in a line perpendicular to the earth-sun line. This shows > the dramatic > increase in minor planet discoveries by WISE (the Widefield > Infrared > Survey Explorer), which only images near 90-degree > elongation. > > The final color-coding of minor planets differentiates the > NEOs from the > mainbelters. Earth-crossing NEOs are colored red; > earth-approaching NEOs > (perihelion distance less than 1.3 a.u.) are in yellow; all > others are > green. > > Cheers, > Rob > ______________________________________________ > Visit the Archives at > http://www.meteoritecentral.com/mailing-list-archives.html > Meteorite-list mailing list > [email protected] > http://six.pairlist.net/mailman/listinfo/meteorite-list > ______________________________________________ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list [email protected] http://six.pairlist.net/mailman/listinfo/meteorite-list
