MPEC 2000-D30 : 1998 XZ4
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M.P.E.C. 2000-D30 Issued 2000 Feb. 27, 17:39 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
BMARSDEN@CFA.HARVARD.EDU or GWILLIAMS@CFA.HARVARD.EDU
URL http://cfa-www.harvard.edu/iau/mpc.html ISSN 1523-6714
1998 XZ4
Revision to MPEC 1998-X39
Observations:
J98X04Z 1C2000 02 10.67215 10 46 26.64 +00 09 28.6 20.6 R 413
J98X04Z 1C2000 02 10.67573 10 46 26.39 +00 09 29.0 20.5 R 413
J98X04Z 1C2000 02 10.67930 10 46 26.16 +00 09 29.7 20.6 R 413
J98X04Z 1C2000 02 26.49895 10 27 10.73 +00 54 22.1 20.2 R 413
J98X04Z 1C2000 02 26.50202 10 27 10.48 +00 54 22.8 20.1 R 413
J98X04Z 1C2000 02 26.50538 10 27 10.23 +00 54 23.2 20.5 R 413
Observer details:
413 Siding Spring. Observer R. H. McNaught. 1.0-m f/8 reflector + CCD.
First and last observations above in comparison with prediction:
Residuals in seconds of arc, reference and Delta-T
000210 413 25.2- 8.3- 000226 413 25.8- 8.7- MPC 33767 +0.0066 day
Orbital elements:
1998 XZ4
Epoch 2000 Feb. 26.0 TT = JDT 2451600.5 Williams
M 197.14951 (2000.0) P Q
n 0.36484253 Peri. 9.40559 +0.89118999 +0.39207939
a 1.9396904 Node 324.60067 -0.43758998 +0.61046936
e 0.6383038 Incl. 23.19509 -0.11956341 +0.68818669
P 2.70 H 16.3 G 0.15 U 4
Residuals in seconds of arc
981211 704 0.5+ 1.1+ 981214 658 1.9- 1.7- 981227 402 0.2+ 0.2-
981211 704 1.7+ 0.9- 981214 658 1.5- 1.3- 981227 402 0.5- 0.0
981211 704 1.5+ 0.6- 981214 658 1.8- 1.1- 981227 402 0.3- 0.4+
981211 704 (2.8+ 0.0 ) 981214 658 1.6- 1.4- 990105 557 0.4- 0.3-
981211 704 1.4+ 0.5+ 981214 658 1.2- 1.3- 990105 557 0.3- 0.2-
981213 327 0.3+ 0.0 981214 704 0.6+ 0.4+ 990118 402 0.1- 0.4+
981213 327 0.3+ 0.2+ 981214 704 0.2- 0.2- 990118 402 0.2- 0.4+
981213 327 0.0 0.2+ 981214 704 0.0 0.9+ 990118 402 0.2- 0.1+
981213 327 0.3+ 0.1+ 981214 704 0.6- 1.2+ 990122 360 0.7+ 0.5+
981213 046 0.0 0.5+ 981214 587 1.1+ 2.0- 990122 360 0.9+ 0.3+
981213 046 0.1+ 0.5+ 981216 360 0.1- 0.1+ 990122 360 0.9+ 0.2+
981213 046 0.1+ 0.2+ 981216 360 0.1- 0.1- 000210 413 0.2- 0.3-
981213 046 0.5+ 0.1+ 981216 360 0.0 0.0 000210 413 0.2- 0.3-
981213 046 0.5+ 0.2+ 981217 540 0.7+ 0.8+ 000210 413 0.1+ 0.0
981213 046 0.3+ 0.2+ 981217 540 0.3- 1.9+ 000226 413 0.1+ 0.2+
981214 711 (2.4- 0.1-) 981217 540 0.5+ 0.5+ 000226 413 0.1- 0.2+
981214 711 0.0 0.2+ 981223 402 0.9- 0.5- 000226 413 0.1+ 0.1-
981214 711 0.1+ 0.2+ 981223 402 0.7- 0.4-
981214 704 0.5+ 0.5+ 981223 402 0.7- 0.5-
Ephemeris:
1998 XZ4 a,e,i = 1.94, 0.64, 23 q = 0.7016
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2000 02 26 10 27.81 +00 52.6 2.174 3.157 171.7 2.6 20.8
2000 03 07 10 15.30 +01 30.3 2.177 3.147 165.6 4.5 20.9
2000 03 17 10 03.72 +02 10.1 2.211 3.136 153.9 8.0 21.1
2000 03 27 09 53.91 +02 47.4 2.275 3.122 142.0 11.3 21.3
2000 04 06 09 46.41 +03 18.6 2.362 3.107 130.5 14.2 21.4
2000 04 16 09 41.47 +03 41.2 2.468 3.089 119.6 16.4 21.6
2000 04 26 09 39.08 +03 53.9 2.585 3.070 109.4 18.0 21.7
2000 05 06 09 39.06 +03 56.4 2.710 3.049 99.8 19.0 21.9
2000 05 16 09 41.18 +03 48.5 2.837 3.025 90.8 19.5 22.0
Gareth V. Williams (C) Copyright 2000 MPC M.P.E.C. 2000-D30
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