[meteorite-list] Dawn's Re-Entry Into Asteroid Belt

From: countdeiro at earthlink.net <countdeiro_at_meteoritecentral.com>
Date: Sun, 15 Nov 2009 10:08:34 -0500 (EST)
Message-ID: <32383464.1258297714585.JavaMail.root_at_wamui-haziran.atl.sa.earthlink.net>

Now..this is what were talking about. The LIST at it's best. Dispensing relative information that many listees wouldn't have thought of...or wouldn't have had the answer to if they did. And like Melanie says " you don't always know what you'll get". The next post could require one to hit the "papers" and "publications" to comprehend. The depth of the metoritical knowledge of the individuals who post on this List is unparalleled. What a resource!

The List is a lecture, a symposium, an announcement, a discussion, an advertisement, a communication, a report, a sharing....and it's free!

Best regards and good hunting,

Count Deiro

-----Original Message-----
>From: Meteorites USA <eric at meteoritesusa.com>
>Sent: Nov 15, 2009 2:05 AM
>To: "meteorite-list at meteoritecentral.com" <meteorite-list at meteoritecentral.com>
>Subject: [meteorite-list] Dawn's Re-Entry Into Asteroid Belt
>
>
>
>On November 13, Dawn will enter the asteroid belt to stay as its silent
>flight takes it past 1.666 AU from the Sun. Dawn will remain in the belt
>for the rest of its mission and well beyond. It will become a permanent
>inhabitant of that part of the solar system, the first emissary from Earth
>to take up residence in the main asteroid belt. http://dawn.jpl.nasa.gov/
>
>Question: Is the spacecraft at risk in the asteroid belt? Since the Dawn
>mission is to fly "through" the asteroid belt, is there any concern it
>will be hit and destroyed by micrometeorites?
>
>Answer: More precisely, Dawn flies IN the asteroid belt, so it has a
>very similar speed to the material around it. So, the material is a
>little less dangerous that you might assume. But, most importantly, the
>small meteoroids are far between and the chance of hitting one if you
>are the size of Dawn is small (but not totally negligible). We,
>therefore, are concerned and will avoid any region where we think there
>might be higher than usual danger. Answer provided by Chris Russell,
>Principal Investigator for the Dawn mission
>
>http://www.jpl.nasa.gov/news/features.cfm?feature=2361
>Dawn spacecraft is to reconnoiter Vesta and Ceres, the asteroid belt's
>two most massive inhabitants -- the asteroid Vesta and dwarf planet Ceres.
>
>Enjoy...
>
>Regards,
>Eric Wichman
>Meteorites USA
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Received on Sun 15 Nov 2009 10:08:34 AM PST