Central Bureau for Astronomical Telegrams
IAUC 4716: 1989c
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Read IAUC 4717
Circular No. 4716
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 BRADFIELD (1989c)
Further precise positions have been reported as follows:
1989 UT R.A. (1950) Decl. Observer
Jan. 11.45625 22 01 07.57 -53 37 24.0 Herald
12.47854 22 10 16.19 -52 56 29.6 McNaught
12.47986 22 10 17.01 -52 56 24.8 "
12.48116 22 10 17.75 -52 56 23.2 "
13.45177 22 18 31.27 -52 16 09.0 Herald
13.46239 22 18 36.19 -52 15 40.7 "
13.46761 22 18 38.52 -52 15 24.8 McNaught
D. Herald (Kambah, near Canberra). Comet very faint on Jan. 11.
Inkdot measured on Jan. 13.462.
R. H. McNaught (Siding Spring). Uppsala Southern Schmidt. Weak
images on Jan. 12. Deeper exposure on Jan. 13 shows coma
extended in p.a. 110 deg.
Improved parabolic orbital elements by Herald from the 15
available observations Jan. 7-13:
T = 1988 Dec. 5.477 ET Peri. = 195.969
Node = 27.485 1950.0
q = 0.42654 AU Incl. = 82.885
1989 ET R.A. (1950) Decl. Delta r m1
Jan. 14 22 22.97 -51 53.0 1.472 1.019 11.9
19 22 57.97 -48 12.2
24 23 24.91 -44 30.0 1.670 1.201 12.9
29 23 46.22 -40 58.2
Feb. 3 0 03.60 -37 41.7 1.893 1.376 13.8
8 0 18.17 -34 41.6
13 0 30.72 -31 57.7 2.127 1.545 14.5
18 0 41.74 -29 28.7
23 0 51.62 -27 13.3 2.361 1.709 15.2
28 1 00.59 -25 09.9
Mar. 5 1 08.86 -23 17.4 2.588 1.868 15.8
10 1 16.56 -21 34.6
15 1 23.78 -20 00.4 2.804 2.022 16.3
1989 January 13 (4716) Brian G. Marsden
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