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Moons of Kleopatra |
 Sep 25 2008, 11:48 PM
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#1
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 Senior Member  Group: Moderator Posts: 3242 Joined: 11-February 04 From: Tucson, AZ Member No.: 23  |
Anyone have a details from the IAU Circular #8980? The subject headers suggest that two satellites have been discovered at 216 Kleopatra, an oddly shaped M-type main belt asteroid.
-------------------- &@^^!% Jim! I'm a geologist, not a physicist!
The Gish Bar Times - A Blog all about Jupiter's Moon Io |
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Sep 26 2008, 03:07 AM
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#2
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 Member Group: Members Posts: 903 Joined: 30-January 05 Member No.: 162 |
Introduction to Asteroids mentions a possible satellite detection via occultation in 1980. Curious if the orbits of either moon(let) are consistent with that event.
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Sep 27 2008, 04:58 AM
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#3
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Member Group: Members Posts: 544 Joined: 17-November 05 From: Oklahoma Member No.: 557 |
Did my best, but all I can come up with is the circular itself, which is password protected (you knew that already).
Searching through the MPECs from the MPC, and information on AstDys, didn't turn up anything obvious. Kleopatra is just a couple weeks past opposition, so whatever observations may be involved could have been very recent. Back in 1999, there was a lot of discussion of Kleopatra actually being two separate objects in orbit around each other, a binary asteroid. Arecibo observations seemed to indicate, by radar, that it was a single dogbone shaped object, but I'm wondering if maybe this S1 and S2 business might be taking it back the other direction. Just speculating. Mainly, I'm wondering how you get two smaller satellites into stable orbits around a "dogbone" unless they're really far out. |
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Sep 27 2008, 05:35 PM
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#4
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 Member Group: Members Posts: 809 Joined: 11-March 04 Member No.: 56 |
They ought to name one of the moons "Caesarion". And the other one, I suppose, "Marcus Antonius".
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Sep 28 2008, 01:28 AM
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#5
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Solar System Cartographer Group: Members Posts: 10265 Joined: 5-April 05 From: Canada Member No.: 227 |
There was a stellar occultation by Kleopatra on Sept. 26, visible from Australia. No word on results yet.
Phil -------------------- ... because the Solar System ain't gonna map itself.
Also to be found posting similar content on https://mastodon.social/@PhilStooke Maps for download (free PDF: https://upload.wikimedia.org/wikipedia/comm...Cartography.pdf NOTE: everything created by me which I post on UMSF is considered to be in the public domain (NOT CC, public domain) |
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Sep 28 2008, 02:15 AM
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#6
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Member Group: Members Posts: 544 Joined: 17-November 05 From: Oklahoma Member No.: 557 |
QUOTE (David @ Sep 27 2008, 11:35 AM)  They ought to name one of the moons "Caesarion". And the other one, I suppose, "Marcus Antonius". Careful. If they ever name an asteroid "Augustus" (Augusta and Augustinus are as close as they've come so far), then said asteroid might feel an obligation to collide with one or both moons. Speaking of occultations, I had forgotten that the 1991 event was well enough observed to demonstate that Kleopatra is all but proven to be a single body, so I suppose we really are talking about moons here. |
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Oct 2 2008, 04:58 PM
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#7
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 Member Group: Members Posts: 571 Joined: 20-April 05 From: Silesia Member No.: 299 |
QUOTE (volcanopele @ Sep 26 2008, 12:48 AM) The subject headers suggest that two satellites have been discovered at 216 Kleopatra, an oddly shaped M-type main belt asteroid. Composite image of (216) Kleopatra observed with the 10m-Keck II telescope and its adaptive optics system on September 19 2008 UT. The arrows indicate the position of the newly discovered satellites with temporary names S/2008 (216) 1 and S/2008 (216) 2. Kleopatra (216), S/2008(216) 1 and S/2008(216) 2 -------------------- Free software for planetary science (including Cassini Image Viewer).
http://members.tripod.com/petermasek/marinerall.html |
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