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MPEC J04: 2009 HC82 [a=2.26,e=0.82,i=154.6,H=16.2,PHA] [26220-2011/0   Message List  
Reply | Forward Message #21811 of 22725 |
Hi all,

2009 HC82 is apparently the first known Apollo object with a retrograde orbit.
Quite a big rock (2-3 km).
There was already an Amor type object in that case : 2007 VA85

JCM


----- Original Message -----
From: "MPEC mailing list" <qmpc@...>
To: <JCMerlin@...>
Sent: Friday, May 01, 2009 6:58 PM
Subject: MPEC J04: 2009 HC82 [a=2.26,e=0.82,i=154.6,H=16.2,PHA]
[26220-2011/02-R1]


>
> M.P.E.C. 2009-J04 Issued 2009 May 1, 16:39 UT
>
> 2009 HC82
>
> Orbital elements:
> 2009 HC82 PHA, Earth MOID = 0.0235
AU
> Epoch 2009 June 18.0 TT = JDT 2455000.5 MPC
> M 64.79849 (2000.0) P Q
> n 0.29099311 Peri. 291.70705 +0.91746366 +0.06497679
> a 2.2553516 Node 293.55963 +0.15508685 -0.96693369
> e 0.8222477 Incl. 154.64869 -0.36634479 -0.24661155
> P 3.39 H 16.2 G 0.15 U 9
> q = 0.4009






Fri May 1, 2009 5:56 pm

jcmerlin@...
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Hi all, 2009 HC82 is apparently the first known Apollo object with a retrograde orbit. Quite a big rock (2-3 km). There was already an Amor type object in that...
Jean-Claude MERLIN
jcmerlin@...
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May 1, 2009
5:56 pm

... Name a e i q 1999 XS35 17.9 0.95 19.4 0.95 2005 VD 6.67 0.25 172.8 0.30 2007 VA85 3.9 0.72 132.6 1.09 ...
Brian Skiff
bas@...
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May 1, 2009
9:51 pm

Hi Jean-Claude, This may yet turn out to be something more comet-like. The orbit below (and some intermediate ones) fit reasonably well. Further observations...
Bill J Gray
feliks314159
Offline Send Email
May 2, 2009
12:53 am

Hi Bill and Brian, OK, thanks. Probably "extinct" comet nuclei effectively. I didn't know that the retrograde inclination was a criterion for the Damocloid...
Jean-Claude MERLIN
jcmerlin@...
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May 2, 2009
12:29 pm
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