MPEC 1998-X20: 1998 XB
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M.P.E.C. 1998-X20 Issued 1998 Dec. 5, 17:17 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.
BMARSDEN@CFA.HARVARD.EDU or GWILLIAMS@CFA.HARVARD.EDU
URL http://cfa-www.harvard.edu/iau/mpc.html
1998 XB
Observations:
J98X00B C1998 11 25.45604 10 33 19.18 +18 58 15.0 18.9 704
J98X00B C1998 11 25.46656 10 33 20.79 +18 58 19.3 18.7 704
J98X00B C1998 11 25.47715 10 33 22.64 +18 58 20.3 18.7 704
J98X00B C1998 11 25.48772 10 33 24.22 +18 58 23.5 18.7 704
J98X00B* C1998 12 01.87403 10 51 10.23 +19 29 00.7 327
J98X00B C1998 12 01.88475 10 51 12.00 +19 29 04.3 16.4 327
J98X00B C1998 12 01.89575 10 51 13.83 +19 29 08.1 327
J98X00B C1998 12 02.80773 10 53 49.48 +19 34 13.5 16.5 327
J98X00B C1998 12 02.81219 10 53 50.22 +19 34 14.8 327
J98X00B C1998 12 02.81639 10 53 50.92 +19 34 16.3 327
J98X00B C1998 12 02.89715 10 54 04.38 +19 34 44.7 16.5 327
J98X00B C1998 12 02.90591 10 54 05.83 +19 34 47.8 327
J98X00B C1998 12 02.91478 10 54 07.32 +19 34 51.0 327
J98X00B C1998 12 03.36964 10 55 25.63 +19 37 30.3 15.3 R 758
J98X00B C1998 12 03.37277 10 55 26.19 +19 37 32.1 15.1 R 758
J98X00B C1998 12 03.38338 10 55 27.95 +19 37 36.0 15.1 R 758
J98X00B C1998 12 03.38649 10 55 28.47 +19 37 37.2 15.0 R 758
J98X00B C1998 12 03.39707 10 55 30.15 +19 37 40.1 15.4 R 758
J98X00B C1998 12 04.03368 10 57 19.71 +19 41 20.9 046
J98X00B C1998 12 04.03506 10 57 19.92 +19 41 21.8 046
J98X00B C1998 12 04.03610 10 57 20.06 +19 41 22.3 046
J98X00B C1998 12 04.03745 10 57 20.32 +19 41 22.4 046
J98X00B C1998 12 04.13532 10 57 36.73 +19 42 02.8 097
J98X00B C1998 12 04.14534 10 57 38.42 +19 42 06.7 097
J98X00B C1998 12 04.37163 10 58 17.89 +19 43 28.6 15.8 R 758
J98X00B C1998 12 04.38105 10 58 19.47 +19 43 32.2 15.8 R 758
J98X00B C1998 12 04.38413 10 58 19.92 +19 43 33.4 16.2 R 758
J98X00B C1998 12 04.38727 10 58 20.45 +19 43 34.9 16.2 R 758
J98X00B C1998 12 04.39042 10 58 21.03 +19 43 35.7 15.8 R 758
J98X00B C1998 12 04.45280 10 58 31.73 +19 43 55.4 16.3 R 713
J98X00B C1998 12 04.46571 10 58 33.93 +19 44 00.0 16.4 R 713
J98X00B C1998 12 04.47843 10 58 36.02 +19 44 04.9 16.6 R 713
J98X00B C1998 12 04.49293 10 58 38.53 +19 44 09.6 16.9 R 713
J98X00B C1998 12 04.79603 10 59 31.22 +19 46 01.3 16.5 327
J98X00B C1998 12 04.79988 10 59 31.88 +19 46 02.6 327
J98X00B C1998 12 04.80380 10 59 32.55 +19 46 03.8 327
J98X00B C1998 12 04.88939 10 59 47.04 +19 46 36.5 16.5 327
J98X00B C1998 12 04.89332 10 59 47.69 +19 46 38.4 327
J98X00B C1998 12 04.89734 10 59 48.35 +19 46 39.8 327
J98X00B C1998 12 05.09543 11 00 22.79 +19 47 55.7 097
J98X00B C1998 12 05.09868 11 00 23.34 +19 47 57.0 097
Observer details:
046 Klet. Observers M. Tichy, Z. Moravec. Measurer M. Tichy. 0.57-m f/5.2
reflector + CCD.
097 Wise Observatory, Mitzpeh Ramon. Observers E. O. Ofek, I. Manulis.
Measurer E. O. Ofek. 1.0-m f/7 reflector + CCD.
327 Peking Observatory, Xinglong Station. Observers X. M. Teng, J. Zhu,
X. S. Liu. Measurers X. Y. Li, X. M. Teng, J. Zhu. 0.6-m Schmidt + CCD.
704 Lincoln Laboratory ETS, New Mexico. Observers M. Blythe, F. Shelly,
M. Bezpalko. Measurers J. Stuart, H. Viggh, R. Sayer. 1.0-m f/2.15
reflector + CCD.
713 Thornton. Observer R. A. Koff. 0.20-m f/10 Schmidt-Cassegrain + CCD.
758 BCC Observatory, Cocoa. Observer I. P. Griffin. 0.30-m f/5 Maksutov
+ CCD.
Orbital elements:
1998 XB
Epoch 1998 Nov. 23.0 TT = JDT 2451140.5 Williams
M 202.14882 (2000.0) P Q
n 0.95560103 Peri. 187.75743 +0.03308517 +0.95488364
a 1.0208258 Node 84.48495 -0.90032448 +0.15669025
e 0.3223428 Incl. 17.24775 -0.43395991 -0.25228040
P 1.03 H 14.2 G 0.15
From 41 observations 1998 Nov. 25-Dec. 5.
Ephemeris:
1998 XB a,e,i = 1.02, 0.32, 17 q = 0.6918
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
1998 12 03 10 54.36 +19 35.4 0.826 1.321 93.2 48.2 16.2
1998 12 13 11 23.85 +20 45.7 0.737 1.301 97.1 48.7 15.9
1998 12 23 11 55.83 +22 25.7 0.653 1.276 100.5 49.3 15.6
1999 01 02 12 31.37 +24 39.3 0.575 1.246 103.0 50.3 15.3
1999 01 12 13 11.97 +27 25.5 0.506 1.210 104.1 52.0 15.1
1999 01 22 13 59.29 +30 33.4 0.447 1.170 103.2 55.0 14.8
1999 02 01 14 54.96 +33 33.1 0.401 1.125 99.8 59.7 14.6
1999 02 11 15 59.41 +35 34.9 0.369 1.076 93.7 66.3 14.5
1999 02 21 17 10.08 +35 41.5 0.349 1.023 85.5 74.6 14.6
1999 03 03 18 21.62 +33 13.5 0.343 0.967 75.9 84.0 14.7
1999 03 13 19 28.94 +28 15.0 0.351 0.909 65.9 93.5 15.0
1999 03 23 20 29.84 +21 31.6 0.374 0.851 56.8 101.7 15.4
1999 04 02 21 24.95 +14 13.3 0.415 0.797 49.8 106.8 15.8
1999 04 12 22 16.08 +07 37.4 0.477 0.750 45.5 107.5 16.0
Gareth V. Williams (C) Copyright 1998 MPC M.P.E.C. 1998-X20
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