MPEC 2009-H56 : COMET C/2001 D1 = 2004 X7 = 2008 S2 = 1997 J6 (SOHO)
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M.P.E.C. 2009-H56 Issued 2009 Apr. 26, 16:41 UT
The Minor Planet Electronic Circulars contain information on unusual
minor planets and routine data on comets. They are published
on behalf of Commission 20 of the International Astronomical Union by the
Minor Planet Center, Smithsonian Astrophysical Observatory,
Cambridge, MA 02138, U.S.A.
Prepared using the Tamkin Foundation Computer Network
MPC@CFA.HARVARD.EDU
URL http://www.cfa.harvard.edu/iau/mpc.html ISSN 1523-6714
COMET C/2001 D1 = 2004 X7 = 2008 S2 = 1997 J6 (SOHO)
Observations:
CJ97J060 2S1997 05 01.91714 02 29 41.5 +14 25 15 EH056249
CJ97J060 2s1997 05 01.91714 2 +0.00509069 +0.00910385 +0.00338636 EH056249
CJ97J060 2S1997 05 01.94901 02 30 21.4 +14 24 43 EH056249
CJ97J060 2s1997 05 01.94901 2 +0.00508838 +0.00910637 +0.00338662 EH056249
CJ97J060 2S1997 05 01.98204 02 31 02.6 +14 24 25 EH056249
CJ97J060 2s1997 05 01.98204 2 +0.00508598 +0.00910897 +0.00338688 EH056249
Observer details:
249 SOHO. SOHO-LASCO coronagraph C2. Comet precovery by R. Kracht (following
his 2001-2004-2008 identification on MPEC 2008-S82), measurements by
K. Battams, reductions by B. G. Marsden.
Orbital elements:
Epoch 1997 Apr. 22.0 TT = JDT 2450560.5
T 1997 May 1.66417 TT MPC
q 0.0493993 (2000.0) P Q
n 0.25936030 Peri. 172.09884 +0.92664261 +0.36722066
a 2.4351949 Node 165.54076 -0.36014730 +0.92853859
e 0.9797144 Incl. 18.81136 -0.10783041 +0.05445256
P 3.80
Epoch 2001 Feb. 20.0 TT = JDT 2451960.5
T 2001 Feb. 18.76966 TT MPC
q 0.0498142 (2000.0) P Q
n 0.25917515 Peri. 172.09340 +0.92660154 +0.36737270
a 2.4363545 Node 165.54137 -0.36021490 +0.92842538
e 0.9795538 Incl. 18.75855 -0.10795748 +0.05535001
P 3.80
Epoch 2004 Dec. 21.0 TT = JDT 2453360.5
T 2004 Dec. 7.82367 TT MPC
q 0.0469340 (2000.0) P Q
n 0.26072193 Peri. 172.44783 +0.92705533 +0.36490711
a 2.4267088 Node 165.23360 -0.35922487 +0.93025307
e 0.9806594 Incl. 19.74060 -0.10735877 +0.03836705
P 3.78
Epoch 2008 Sept. 11.0 TT = JDT 2454720.5
T 2008 Sept. 17.95601 TT MPC
q 0.0466897 (2000.0) P Q
n 0.26080569 Peri. 172.47655 +0.92716759 +0.36453259
a 2.4261893 Node 165.22054 -0.35896467 +0.93044942
e 0.9807559 Incl. 19.81280 -0.10725963 +0.03714659
P 3.78
Residuals in seconds of arc
970501 249 4.1+ 3.3+ Y 010218 249 0.8- 1.2+ Y 041207 249 4.4+ 4.5- Y
970501 249 2.0+ 3.0- Y 010218 249 0.1- 2.4+ Y 041207 249 13.3- 3.2- Y
970501 249 9.1- 0.1- Y 010218 249 2.5- 4.9+ Y 041207 249 0.5+ 7.8- Y
010218 249 (0.6- 32.8+)Y 010218 249 11.4- 6.0- Y 041207 249 2.3- 5.2+ Y
010218 249 16.3+ 1.8+ Y 010218 249 16.8- 10.1- Y 041207 249 7.4+ 10.4- Y
010218 249 17.0+ 19.7+ Y 010218 249 3.2- 4.2- Y 041207 249 17.4- 6.3- Y
010218 249(10.2+ 21.3-)Y 010218 249 13.0- 0.2- Y 041207 249 0.7+ 13.0- Y
010218 249 9.0+ 17.4- Y 010218 249 5.0- 1.8+ Y 041207 249 9.0- 1.3- Y
010218 249 8.8+ 10.4- Y 010218 249 3.7+ 4.1- Y 041207 249 5.7- 5.6- Y
010218 249 1.3+ 3.4- Y 010218 249(26.0- 1.0-)Y 080917 249(25.6+ 3.8-)Y
010218 249 4.0+ 7.7+ Y 010218 249 6.1- 9.8- Y 080917 249 3.4- 2.8+ Y
010218 249 1.1- 3.3- Y 010218 249 1.9- 10.7- Y 080917 249(27.1+ 34.3+)Y
010218 249 11.5+ 16.8+ Y 010218 249 3.7- 5.6+ Y 080917 249(31.3+ 2.1-)Y
010218 249 2.6+ 4.9+ Y 010218 249 12.7- 8.8+ Y 080917 249(31.8+ 5.3+)Y
010218 249 0.3+ 2.9+ Y 010218 249 4.3+ 9.8- Y 080917 249 10.2+ 1.4+ Y
010218 249 11.5+ 10.1+ Y 010218 249(23.0- 2.8-)Y 080917 249 3.0+ 10.6+ Y
010218 249 (8.6+ 21.1+)Y 010218 249 6.4+ 3.8+ Y 080917 249(32.4+ 19.5+)Y
010218 249 1.5- 7.3+ Y 010219 249 13.3- 5.0- Y 080918 249(22.5- 9.0+)Y
010218 249 0.2+ 6.5+ Y 041207 249(77.0- 45.4-)Y 080918 249 0.3- 2.2- Y
010218 249 13.4- 2.3- Y 041207 249 5.7- 1.5+ Y 080918 249 1.3+ 4.9+ Y
010218 249 9.3- 7.8+ Y 041207 249(29.1- 13.4-)Y 080918 249 7.1- 9.4+ Y
010218 249 7.4+ 13.1+ Y 041207 249 1.9- 11.2- Y 080918 249 7.3- 11.0- Y
010218 249 2.2+ 5.2+ Y 041207 249 9.0- 9.1- Y 080918 249 3.0+ 5.9- Y
010218 249 13.9+ 7.6+ Y 041207 249 4.7+ 1.8+ Y 080918 249 4.3+ 2.2+ Y
010218 249 4.6- 3.8+ Y 041207 249 0.9- 2.2+ Y 080918 249 8.9- 6.6+ Y
The above computation, using nongravitational parameters A1 = +0.0002,
A2 = -0.0002, is based on work by R. Kracht. Despite the poor quality of the
SOHO observations, a purely gravitational computation from the four
apparitions appears to leave significantly systematic residuals.
Brian G. Marsden (C) Copyright 2009 MPC M.P.E.C. 2009-H56
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