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What kind of object is 656 Beagle (1908BU)?

I know it's a minor planet, but that includes a large array of different stuff. Specifically, I am looking at the general chemistry/geology of the object.

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    $\begingroup$ This is really an astronomy question, not a physics question. $\endgroup$
    – David Z
    May 3, 2011 at 21:48
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    $\begingroup$ I nominate for reopening based on astronomy being on-topic now. (And besides, astronomy has been physics since before physics was physics by several millennia ;) But if people think it is still too localized, then don't bother reopening. $\endgroup$
    – user10851
    Jun 17, 2013 at 4:59
  • $\begingroup$ @ChrisWhite: Could be too localized, but meh. Reopened. $\endgroup$ Jun 17, 2013 at 8:19

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656 Beagle is a small (~53 km diameter) asteroid with a 3.15 AU semimajor axis. It's luminosity is very faint, with H = 9.92. Nothing seems to be known about its geologic basis, but it certainly does not possess a measurable atmosphere. See http://occsec.wellington.net.nz/planet/2008/updates/080912_656_19331_u.htm for more information.

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