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Circular No. 6288
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
BMARSDEN@CFA.HARVARD.EDU or DGREEN@CFA.HARVARD.EDU (science)
Phone 617-495-7244/7440/7444 (for emergency use only)
COMET C/1996 A1 (JEDICKE)
The following precise CCD positions have been reported:
1996 UT R.A. (2000) Decl. m1 Observer
Jan. 16.01936 9 23 33.77 + 7 09 48.5 Pravec
16.03166 9 23 33.43 + 7 09 48.8 "
16.03755 9 23 33.29 + 7 09 49.1 17.0 "
16.04809 9 23 33.02 + 7 09 49.8 16.0 Ticha
16.05170 9 23 32.89 + 7 09 49.9 "
16.05418 9 23 32.84 + 7 09 50.1 "
16.19571 9 23 29.36 + 7 09 55.6 16.7 Offutt
16.24265 9 23 28.14 + 7 09 57.4 "
16.29265 9 23 26.80 + 7 09 59.0 "
P. Pravec and L. Sarounova (Ondrejov). 0.65-m f/3.6 reflector.
J. Ticha, M. Tichy and Z. Moravec (Klet). 0.57-m f/5.2 reflector.
W. Offutt (Cloudcroft). 0.60-m f/7 Ritchey-Chretien. Tail > 2' long.
Further to the observations on IAUC 6287, J. V. Scotti, Lunar and
Planetary Laboratory, notes that on Jan. 15.28 there was a tail 4'.74 long
in p.a. 293 deg; the comet's nuclear magnitude was 20.3.
The following parabolic orbital elements, from 15 observations
Jan. 14-16, are extremely uncertain:
T = 1997 Apr. 17.758 TT Peri. = 324.878
Node = 264.410 2000.0
q = 2.46872 AU Incl. = 8.109
1996 TT R. A. (2000) Decl. Delta r Elong. Phase m1
Jan. 13 9 24.81 + 7 08.3 4.338 5.213 149.9 5.4 16.9
18 9 22.70 + 7 11.1 4.264 5.174 155.3 4.6 16.8
23 9 20.38 + 7 15.5 4.197 5.136 160.5 3.7 16.7
28 9 17.87 + 7 21.3 4.138 5.097 165.5 2.8 16.7
Feb. 2 9 15.24 + 7 28.4 4.086 5.058 169.7 2.0 16.6
7 9 12.51 + 7 36.7 4.041 5.019 171.8 1.6 16.5
12 9 09.74 + 7 46.1 4.005 4.981 170.4 1.9 16.5
17 9 06.97 + 7 56.2 3.976 4.942 166.4 2.7 16.4
22 9 04.26 + 8 06.9 3.955 4.903 161.5 3.7 16.4
27 9 01.67 + 8 17.9 3.942 4.865 156.3 4.7 16.3
(C) Copyright 1996 CBAT
1996 January 16 (6288) Brian G. Marsden
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