MPEC 2007-X36 : 1998 YM4
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Read MPEC 2007-X35
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M.P.E.C. 2007-X36 Issued 2007 Dec. 7, 18:34 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
1998 YM4
Revision to MPEC 1998-Y22
Additional Observations:
J98Y04M C2007 12 06.39216 09 47 50.56 +26 13 41.4 19.0 V EX036703
J98Y04M C2007 12 06.39873 09 47 47.79 +26 13 56.0 18.9 V EX036703
J98Y04M C2007 12 06.40523 09 47 44.91 +26 14 09.5 19.2 V EX036703
J98Y04M C2007 12 06.41178 09 47 42.10 +26 14 25.0 19.2 V EX036703
J98Y04M C2007 12 06.44482 09 47 27.85 +26 15 36.4 20.2 V EX036703
J98Y04M C2007 12 06.44915909 47 25.29 +26 15 43.1 20.1 V EX036H55
J98Y04M C2007 12 06.45240709 47 23.88 +26 15 50.1 20.1 V EX036H55
J98Y04M C2007 12 06.45354 09 47 23.96 +26 15 55.3 19.1 V EX036703
J98Y04M C2007 12 06.45534609 47 22.60 +26 15 56.4 20.1 V EX036H55
J98Y04M C2007 12 06.46191 09 47 20.40 +26 16 13.3 19.1 V EX036703
J98Y04M C2007 12 06.47028 09 47 16.80 +26 16 32.2 19.0 V EX036703
J98Y04M C2007 12 06.48126 09 47 12.03 +26 16 55.0 19.1 V EX036703
J98Y04M C2007 12 06.48606 09 47 09.95 +26 17 05.4 18.4 V EX036703
J98Y04M C2007 12 06.49087 09 47 07.85 +26 17 16.4 19.0 V EX036703
J98Y04M C2007 12 06.49565 09 47 05.75 +26 17 27.0 18.9 V EX036703
Observer details:
703 Catalina Sky Survey. Observer R. E. Hill. Measurers E. C. Beshore,
A. Boattini, G. J. Garradd, A. R. Gibbs, A. D. Grauer, R. E. Hill,
R. A. Kowalski, S. M. Larson, R. H. McNaught. 0.68-m Schmidt + CCD.
H55 Astronomical Research Observatory, Charleston. Observer R. Holmes.
0.61-m f/4.0 astrograph + CCD.
First and last observations above in comparison with prediction:
Residuals in seconds of arc (or two decimals in degrees), reference and Delta-T
071206 703 1.66+ 1.50+ 071206 703 1.62+ 1.51+ MPO 57683 +4.1 day
Orbital elements:
1998 YM4 PHA, Earth MOID = 0.0465 AU
Epoch 2007 Oct. 27.0 TT = JDT 2454400.5 MPC
M 10.40503 (2000.0) P Q
n 0.54942552 Peri. 344.37503 +0.83191351 +0.55459315
a 1.4763755 Node 341.90526 -0.50248063 +0.73866463
e 0.7195912 Incl. 3.43523 -0.23544241 +0.38314620
P 1.79 H 19.7 G 0.15 U 4
Residuals in seconds of arc
981219 385 1.8+ 0.2+ 981221 867 0.5- 0.3- 981227 402 0.2- 0.1-
981219 385 (4.1- 2.8-) 981221 385 0.8+ 0.5+ 981227 402 0.1- 0.1-
981219 888 0.5- 0.4- 981221 385 0.8- 0.6+ 981227 385 1.4+ 0.7+
981219 888 0.7+ 1.2- 981221 400 1.6+ 1.4+ 981227 385 1.1+ 0.7+
981219 888 0.9- 0.6- 981221 400 (1.9+ 2.1+) 981227 385 1.0+ 0.5-
981219 888 0.1- 0.3- 981221 400 1.0+ 0.8+ 981227 385 1.2- 1.2+
981219 888 0.1+ 0.5- 981221 888 0.2- 0.5+ 981228 888 0.0 0.2+
981219 587 0.3- 0.7- 981221 900 0.1+ 0.4+ 981228 888 0.1- 0.0
981219 587 0.1- 0.3+ 981221 888 0.1+ 0.9+ 981228 888 0.1- 0.1+
981219 046 0.5+ 0.4- 981221 900 0.3+ 0.5+ 981228 046 0.8+ 0.9+
981219 046 0.1- 0.1+ 981221 360 0.2+ 0.4+ 981228 046 0.1+ 0.0
981219 587 0.5- 0.2+ 981221 360 0.1+ 0.4+ 981228 046 0.1- 0.2+
981219 046 0.5+ 0.1- 981221 360 0.3+ 0.4+ 981228 046 0.2- 0.5+
981219 046 0.8- 1.3- 981221 888 0.1+ 0.3+ 990103 658 0.2- 0.3-
981219 046 0.4- 0.2- 981221 888 0.1+ 0.6+ 990103 658 0.7- 0.3-
981219 046 0.2+ 0.7- 981222 888 0.1+ 0.3+ 990103 658 0.6- 0.6-
981219 046 0.4- 0.2- 981222 888 0.1+ 0.4+ 990105 867 0.1+ 0.1-
981220 557 0.1- 0.1- 981222 385 1.0+ 0.1- 990105 867 0.0 0.2-
981220 557 0.3- 0.3- 981222 385 0.2- 0.9+ 990105 867 0.1- 0.5-
981220 557 0.4- 0.1- 981222 385 1.0+ 0.3+ 990105 402 0.9+ 0.0
981220 557 0.3- 0.4- 981223 402 1.1- 0.1+ 990105 402 0.1- 0.6-
981220 411 1.7- 0.9- 981223 402 1.1- 0.4- 990105 402 0.0 1.2-
981220 411 0.1- 0.3- 981223 402 0.5- 1.0- 990108 658 0.1- 0.2+
981220 411 1.3- 1.0- 981223 402 1.2- 0.6- 990108 658 0.1+ 0.0
981220 897 (3.8- 1.4-) 981224 888 0.2- 0.3- 990108 658 0.1+ 0.2+
981220 897 0.7+ 0.4+ 981224 888 0.3- 0.1- 990109 411 0.7- 0.3-
981220 897 1.0+ 0.4+ 981224 385 0.4+ 0.7+ 990109 411 0.8- 0.2+
981220 897 0.5- 0.1- 981224 385 0.3- 0.6+ 990109 411 0.1- 0.1-
981220 897 0.8- 1.0- 981224 385 1.6+ 1.6+ 071206 703 0.1- 0.3+
981220 897 (2.4+ 0.1+) 981224 360 0.2- 0.0 071206 703 0.8+ 0.5+
981220 355 0.0 0.2- 981224 360 0.5- 0.2- 071206 703 0.3- 0.3-
981220 355 0.5+ 0.8+ 981224 360 0.2- 0.1+ 071206 703 0.1- 0.8+
981220 908 0.0 0.2- 981225 888 0.1+ 0.6+ 071206 703 0.4+ 0.1-
981220 908 0.3+ 0.3- 981225 888 0.2- 0.4+ 071206 H55 0.4+ 0.1-
981220 908 0.3+ 0.3+ 981225 888 1.1+ 0.4+ 071206 H55 0.3+ 0.1-
981220 360 0.1- 0.2+ 981226 046 1.2+ 1.7- 071206 703 1.1- 0.2-
981220 360 0.2- 0.5+ 981226 046 1.3+ 1.4- 071206 H55 0.2+ 0.2-
981220 360 0.0 0.4+ 981226 385 0.4+ 0.0 071206 703 0.2- 0.4-
981221 557 0.2+ 0.1+ 981226 385 1.3- 0.2- 071206 703 0.2+ 0.3+
981221 557 0.2- 0.0 981226 385 0.3- 0.1- 071206 703 0.1+ 0.6-
981221 557 0.2- 0.1+ 981226 888 0.3- 0.1+ 071206 703 0.1+ 0.6-
981221 867 0.0 0.2- 981226 888 0.3- 0.2- 071206 703 0.1- 0.0
981221 867 0.2+ 0.0 981226 888 0.1- 0.1- 071206 703 0.4- 0.3+
981221 385 0.6- 0.2+ 981227 402 0.2- 0.1-
Ephemeris:
1998 YM4 a,e,i = 1.48, 0.72, 3 q = 0.4140
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2007 12 06 09 50.58 +25 59.5 0.312 1.139 111.9 53.4 19.4
2007 12 16 08 38.54 +30 42.2 0.342 1.260 138.0 31.5 19.2
2007 12 26 07 32.63 +32 20.9 0.405 1.373 160.9 13.5 19.2
2008 01 05 06 44.06 +31 52.1 0.500 1.478 170.2 6.5 19.5
2008 01 15 06 13.71 +30 38.5 0.622 1.576 157.7 13.7 20.4
2008 01 25 05 57.29 +29 24.9 0.765 1.668 144.7 19.9 21.2
2008 02 04 05 50.38 +28 24.8 0.925 1.754 133.2 24.2 21.9
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