Central Bureau for Astronomical Telegrams
IAUC 4890: 1989 UQ; P/SCHWASSMANN-WACHMANN 1
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Read IAUC 4891
Circular No. 4890
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Telephone 617-495-7244/7440/7444 (for emergency use only)
TWX 710-320-6842 ASTROGRAM CAM EASYLINK 62794505
MARSDEN or GREEN@CFA.BITNET MARSDEN or GREEN@CFAPS2.SPAN
1989 UQ
C. Pollas, Observatoire de la Cote d'Azur, reports his discovery
with the 0.9-m Schmidt telescope of a fast-moving asteroidal object:
1989 UT R.A. (1950) Decl. Mag.
Oct. 26.94097 1 30 52.71 + 3 34 04.6 14
26.97685 1 30 41.68 + 3 32 47.0
26.98659 1 30 38.65 + 3 32 26.1
31.02257 1 11 04.83 + 1 09 21.7
31.03646 1 11 00.76 + 1 08 53.4
31.04271 1 10 58.92 + 1 08 40.7
31.04965 1 10 56.98 + 1 08 27.9
Very preliminary orbital elements by B. G. Marsden, Center for
Astrophysics, from the above observations:
T = 1990 Mar. 2.954 ET Peri. = 13.805
e = 0.45019 Node = 187.357 1950.0
q = 0.47230 AU Incl. = 2.713
a = 0.85902 AU n = 1.237944 P = 0.80 years
1989 ET R.A. (1950) Decl. Delta r V
Nov. 2 1 01.97 + 0 03.6 0.247 1.220 13.8
4 0 53.14 - 0 59.7
6 0 44.79 - 1 58.9 0.255 1.211 14.0
8 0 36.95 - 2 53.7
10 0 29.67 - 3 43.9 0.265 1.200 14.3
12 0 22.93 - 4 29.5
14 0 16.76 - 5 10.6 0.278 1.188 14.5
16 0 11.13 - 5 47.4
18 0 06.04 - 6 19.9 0.292 1.175 14.7
PERIODIC COMET SCHWASSMANN-WACHMANN 1
Total visual magnitude estimates (cf. IAUC 4877): Oct. 20.15
UT, 13.6 (R. A. Keen, Mt. Thorodin, CO, 0.32-m reflector); 23.14,
12.3 (Keen); 28.27, 13.3 (C. S. Morris, Pine Mountain Club, CA,
0.26-m reflector); 30.13, 12.8 (Morris).
1989 November 2 (4890) Daniel W. E. Green
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