MPEC 2000-Y39: 1998 HH49
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M.P.E.C. 2000-Y39 Issued 2000 Dec. 24, 20:31 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://cfa-www.harvard.edu/iau/mpc.html ISSN 1523-6714
1998 HH49
Revision to MPEC 1998-J08
Observations:
J98H49H 3C2000 12 23.47197 06 19 29.75 +39 22 14.8 568
J98H49H 3C2000 12 23.47832 06 19 28.77 +39 22 14.9 568
J98H49H 3C2000 12 24.44073 06 17 07.12 +39 22 39.7 23.1 R 568
J98H49H 3C2000 12 24.44816 06 17 05.99 +39 22 39.8 568
Observer details:
568 Mauna Kea. Observers C. Veillet, A. Shapiro. 3.6-m CFHT + CCD.
First and last observations above in comparison with prediction:
Residuals in seconds of arc, reference and Delta-T
001223 568 5.1- 0.6+ 001224 568 5.4- 0.6+ MPO 7465 +0.0025 day
Orbital elements:
1998 HH49 PHA 0.002
Epoch 2001 Apr. 1.0 TT = JDT 2452000.5 Williams
M 142.79143 (2000.0) P Q
n 0.51013909 Peri. 287.53680 +0.65551178 +0.75288533
a 1.5512328 Node 23.73575 -0.62545306 +0.58495081
e 0.5025308 Incl. 8.41273 -0.42321718 +0.30165582
P 1.93 H 21.3 G 0.15 U 3
Residuals in seconds of arc
980428 691 0.1- 0.3- 980430 691 0.2+ 1.3- 981016 568 0.1- 0.4-
980428 691 0.6- 1.9- 980503 691 0.6- 1.0+ 981016 568 0.1- 0.1-
980428 691 0.0 1.3+ 980503 691 0.5+ 0.1+ 981016 568 0.0 0.2+
980429 691 0.3- 0.0 980503 691 0.9- 0.3+ 001223 568 0.2+ 0.2+
980429 691 1.0- 0.4+ 980529 568 0.4+ 0.1- 001223 568 0.1+ 0.1+
980429 691 0.6- 0.3+ 980529 568 0.2+ 0.0 001224 568 0.1- 0.2+
980430 691 (3.4+ 0.5-) 980530 568 0.6- 0.6+ 001224 568 0.1- 0.2+
Ephemeris:
1998 HH49 a,e,i = 1.55, 0.50, 8 q = 0.7717
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2000 12 22 06 23.15 +39 20.7 0.946 1.909 163.5 8.4 23.2
2001 01 01 05 59.57 +39 11.9 1.002 1.958 161.0 9.4 23.4
2001 01 11 05 40.63 +38 28.1 1.084 2.003 151.3 13.7 23.8
Gareth V. Williams (C) Copyright 2000 MPC M.P.E.C. 2000-Y39
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