MPEC 1998-Y41: COMET P/1998 Y2 (LI)
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M.P.E.C. 1998-Y41 Issued 1998 Dec. 30, 16:48 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
COMET P/1998 Y2 (LI)
Observations:
PJ98Y020 C1998 09 23.35729 03 21 38.23 -14 40 10.4 703
PJ98Y020 C1998 09 23.41692 03 21 38.46 -14 40 26.1 703
PJ98Y020 C1998 10 28.33932 03 09 56.57 -15 36 59.3 703
PJ98Y020 C1998 10 28.34941 03 09 56.18 -15 36 58.3 703
PJ98Y020 C1998 10 29.32343 03 09 15.91 -15 34 45.4 703
PJ98Y020 C1998 10 29.33176 03 09 15.57 -15 34 43.5 703
PJ98Y020 C1998 12 26.23575 02 40 26.37 -05 25 56.4 16.2 T 662
PJ98Y020 C1998 12 26.26623 02 40 26.47 -05 25 27.3 16.1 T 662
PJ98Y020 C1998 12 27.31124 02 40 32.08 -05 08 39.7 15.3 T 662
PJ98Y020 C1998 12 27.31584 02 40 32.12 -05 08 34.1 15.3 T 662
PJ98Y020 C1998 12 27.32030 02 40 32.08 -05 08 29.5 15.5 T 662
PJ98Y020 C1998 12 28.00613 02 40 37.04 -04 57 25.8 15.0 T 761
PJ98Y020 C1998 12 28.00845 02 40 36.60 -04 57 23.8 958
PJ98Y020 C1998 12 28.01296 02 40 36.86 -04 57 17.9 958
PJ98Y020 C1998 12 28.02951 02 40 37.28 -04 57 02.8 761
PJ98Y020 C1998 12 28.04815 02 40 37.20 -04 56 43.1 761
PJ98Y020 C1998 12 28.13387 02 40 37.85 -04 55 23.0 15.5 T 734
PJ98Y020 C1998 12 28.14006 02 40 37.87 -04 55 17.3 734
PJ98Y020 C1998 12 28.16014 02 40 37.99 -04 54 57.8 734
PJ98Y020 C1998 12 28.59207 02 40 41.13 -04 47 56.2 900
PJ98Y020 C1998 12 28.59581 02 40 41.17 -04 47 56.0 17.1 T 900
PJ98Y020 C1998 12 28.60942 02 40 41.39 -04 47 41.5 16.0 T 402
PJ98Y020 C1998 12 28.61081 02 40 41.39 -04 47 40.9 402
PJ98Y020 C1998 12 28.61220 02 40 41.41 -04 47 39.1 402
PJ98Y020 C1998 12 28.61359 02 40 41.45 -04 47 37.6 402
PJ98Y020 C1998 12 28.69056 02 40 42.38 -04 46 22.7 046
PJ98Y020 C1998 12 28.69215 02 40 42.40 -04 46 21.9 046
PJ98Y020 C1998 12 28.69293 02 40 42.35 -04 46 20.9 046
PJ98Y020 C1998 12 28.69608 02 40 42.45 -04 46 18.8 046
PJ98Y020 C1998 12 29.49545 02 40 49.46 -04 33 19.1 15.5 T 327
PJ98Y020 C1998 12 29.51586 02 40 49.59 -04 32 59.9 327
PJ98Y020 C1998 12 29.54622 02 40 49.86 -04 32 26.5 327
PJ98Y020 C1998 12 29.83900 02 40 52.86 -04 27 44.0 611
PJ98Y020 C1998 12 29.86157 02 40 52.95 -04 27 23.9 611
Observer details:
046 Klet. Observers J. Ticha, M. Tichy. Measurer M. Tichy. 0.57-m f/5.2
reflector + CCD.
327 Peking Observatory, Xinglong Station. Observers Y. Qiu, Q. Qiao.
0.6-m Schmidt + CCD.
402 Dynic Astronomical Observatory. Observer A. Sugie. 0.60-m f/3.7 reflector
+ CCD.
611 Starkenburg. Observers M. Busch, R. Stoss. Measurer M. Busch.
0.45-m f/4.4 reflector + CCD.
662 Lick Observatory. Observer W.-d. Li. 0.8-m KAIT.
703 Catalina Sky Survey. Observer T. B. Spahr. 0.41-m f/3 Schmidt + CCD.
734 Farpoint Observatory. Observers G. Hug, G. Bell. 0.30-m
Schmidt-Cassegrain + CCD.
761 Zephyrhills. Observer R. A. Kowalski. 0.18-m f/9 reflector + CCD.
900 Moriyama. Observer Y. Ikari. 0.25-m f/6.3 reflector + CCD.
958 Dax. Observers P. Dupouy, P. Marechal. Measurer P. Marechal.
0.32-m f/5.7 reflector + CCD.
Orbital elements:
P/1998 Y2 (Li)
Epoch 1998 Dec. 13.0 TT = JDT 2451160.5
T 1998 Dec. 17.8922 TT Marsden
q 2.518843 (2000.0) P Q
n 0.0650340 Peri. 319.0104 +0.5732985 -0.7083947
a 6.124103 Node 91.8286 +0.8171618 +0.4576726
e 0.588700 Incl. 24.3255 +0.0597948 +0.5373200
P 15.2
From 30 observations 1998 Sept. 23-Dec. 29, mean residual 0".7.
Ephemeris:
P/1998 Y2 (Li)
Date TT R. A. (2000) Decl. Delta r Elong. Phase m1 m2
1998 12 23 02 40.33 -06 17.4 1.855 2.519 122.1 19.3 14.9
1998 12 28 02 40.61 -04 57.5 1.903 2.520 118.1 20.1 14.9
1999 01 02 02 41.53 -03 36.1 1.953 2.522 114.2 20.8 15.0
1999 01 07 02 43.06 -02 13.8 2.008 2.524 110.4 21.4 15.0
1999 01 12 02 45.18 -00 51.3 2.065 2.527 106.6 21.9 15.1
1999 01 17 02 47.87 +00 31.1 2.124 2.531 102.8 22.3 15.2
1999 01 22 02 51.10 +01 53.0 2.186 2.536 99.1 22.5 15.2
1999 01 27 02 54.83 +03 13.9 2.250 2.541 95.5 22.7 15.3
1999 02 01 02 59.04 +04 33.6 2.315 2.547 91.9 22.7 15.4
1999 02 06 03 03.69 +05 51.9 2.382 2.553 88.5 22.7 15.5
1999 02 11 03 08.76 +07 08.5 2.449 2.560 85.0 22.6 15.5
1999 02 16 03 14.21 +08 23.3 2.517 2.568 81.7 22.4 15.6
1999 02 21 03 20.03 +09 36.1 2.586 2.576 78.4 22.1 15.7
1999 02 26 03 26.18 +10 46.8 2.655 2.585 75.1 21.7 15.7
1999 03 03 03 32.64 +11 55.3 2.725 2.594 71.9 21.3 15.8
1999 03 08 03 39.38 +13 01.6 2.794 2.605 68.8 20.8 15.9
1999 03 13 03 46.40 +14 05.4 2.862 2.615 65.7 20.3 16.0
1999 03 18 03 53.66 +15 06.9 2.931 2.627 62.6 19.7 16.0
1999 03 23 04 01.16 +16 05.9 2.998 2.638 59.6 19.0 16.1
1999 03 28 04 08.86 +17 02.4 3.065 2.651 56.7 18.3 16.2
1999 04 02 04 16.76 +17 56.3 3.130 2.664 53.7 17.6 16.2
1999 04 07 04 24.84 +18 47.6 3.195 2.677 50.8 16.8 16.3
1999 04 12 04 33.08 +19 36.3 3.258 2.691 47.9 16.1 16.4
1999 04 17 04 41.47 +20 22.3 3.319 2.706 45.1 15.2 16.4
1999 04 22 04 50.00 +21 05.7 3.379 2.721 42.3 14.4 16.5
1999 04 27 04 58.65 +21 46.5 3.437 2.736 39.5 13.5 16.6
1999 05 02 05 07.39 +22 24.6 3.493 2.752 36.7 12.6 16.6
1999 05 07 05 16.23 +23 00.1 3.548 2.768 33.9 11.7 16.7
1999 05 12 05 25.15 +23 33.0 3.600 2.785 31.2 10.8 16.7
Brian G. Marsden (C) Copyright 1998 MPC M.P.E.C. 1998-Y41
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