Central Bureau for Astronomical Telegrams
IAUC 5419: 1991g1
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Read IAUC 5420
Circular No. 5419
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
COMET ZANOTTA-BREWINGTON (1991g1)
Further precise positions have been reported as follows:
1991 UT R.A. (2000) Decl. Observer
Dec. 26.38681 20 53 53.82 +18 06 31.2 Sugie
26.39306 20 53 55.18 +18 06 22.7 "
26.77569 20 55 18.67 +17 57 11.7 Vagnozzi
26.78993 20 55 21.63 +17 56 50.9 "
28.37589 21 01 13.02 +17 17 35.7 Kobayashi
28.38878 21 01 15.80 +17 17 15.0 "
A. Sugie (Dynic). 0.25-m Schmidt. Communicated by S. Nakano.
A. Vagnozzi (Stroncone). 0.5-m Ritchey-Chretien. Comet very diffuse.
T. Kobayashi (Oizumi). 0.16-m reflector + CCD. Communicated by Nakano.
Parabolic orbital elements from 9 observations Dec. 24-28:
T = 1992 Jan. 31.887 TT Peri. = 197.719
Node = 255.100 2000.0
q = 0.64426 AU Incl. = 49.964
1991/92 R. A. (2000) Decl. Delta r Elong. Phase m1
Dec. 20 20 32.25 +20 24.0 1.182 1.081 59.0 51.3 9.7
25 20 48.97 +18 38.8 1.118 1.007 56.9 54.9 9.3
30 21 07.41 +16 35.0 1.052 0.936 54.6 59.0 8.8
Jan. 4 21 27.67 +14 04.9 0.986 0.867 52.3 63.7 8.3
9 21 49.76 +10 58.9 0.921 0.804 49.8 69.1 7.9
14 22 13.55 + 7 05.7 0.859 0.747 47.2 75.1 7.4
19 22 38.69 + 2 14.5 0.804 0.700 44.7 81.4 7.0
24 23 04.60 - 3 40.7 0.758 0.666 42.5 87.2 6.6
29 23 30.47 -10 34.6 0.725 0.647 41.1 91.6 6.4
Feb. 3 23 55.49 -18 06.9 0.707 0.646 40.9 93.4 6.3
8 0 19.09 -25 46.6 0.704 0.662 42.1 92.4 6.4
Total visual magnitude estimates: Dec. 24.71 UT, 9: (M. V.
Zanotta, Laino, Italy, 0.15-m reflector); 24.74, 10.0 (H. Mikuz,
Ljubljana, Slovenia, Yugoslavia, 0.20-m reflector); 25.12, 9.2 (C. S.
Morris, Whitaker Peak, CA, 0.26-m reflector); 25.75, 9.5 (C. Gualdoni
and M. Cavagna, Sormano, Italy, 20 x 80 binoculars; with 0.5-m
reflector a faint, diffuse tail extending 0.1 deg in p.a. 41 deg);
26.80, 10.0 (D. Rodriguez, Madrid, Spain, 0.20-m reflector).
1991 December 28 (5419) Brian G. Marsden
Read IAUC 5420
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