Central Bureau for Astronomical Telegrams
IAUC 4460: 1987s
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Read IAUC 4461
Circular No. 4460
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
TWX 710-320-6842 ASTROGRAM CAM Telephone 617-495-7244/7440/7444
COMET BRADFIELD (1987s)
The parabolic orbital elements on MPC 12309 (from observations
extending to Sept. 20; ephemeris on MPC 12326) should be
replaced by the elliptical result below, based on 50 observations
extending to Oct. 1, the most recent of them being the following,
by D. Herald, Kambah, near Canberra:
1987 UT R.A. (1950) Decl.
Sept.29.43845 15 45 07.41 -11 48 26.9
Oct. 1.40740 15 50 22.04 -11 16 15.2
Epoch 1987 Nov. 21.0 ET
T = 1987 Nov. 7.2638 ET W = 73.8901
e = 0.995299 O = 267.3792 1950.0
q = 0.869152 AU i = 34.0895
1987 ET R.A. (1950) Decl. Delta r m1
Oct. 2 15 51.97 -11 06.4
4 15 57.45 -10 32.4 1.375 1.067 6.5
6 16 03.05 - 9 57.4
8 16 08.76 - 9 21.3 1.345 1.028 6.3
10 16 14.60 - 8 43.9
12 16 20.56 - 8 05.4 1.314 0.992 6.1
14 16 26.65 - 7 25.5
16 16 32.87 - 6 44.3 1.280 0.959 5.9
18 16 39.23 - 6 01.7
20 16 45.71 - 5 17.7 1.245 0.931 5.7
22 16 52.34 - 4 32.2
24 16 59.12 - 3 45.2 1.208 0.908 5.5
26 17 06.04 - 2 56.6
28 17 13.13 - 2 06.5 1.169 0.889 5.3
30 17 20.37 - 1 14.8
Nov. 1 17 27.80 - 0 21.5 1.130 0.877 5.2
3 17 35.40 + 0 33.3
5 17 43.21 + 1 29.6 1.090 0.870 5.1
7 17 51.22 + 2 27.3
9 17 59.46 + 3 26.5 1.050 0.870 5.0
11 18 07.95 + 4 27.1
13 18 16.71 + 5 29.0 1.011 0.876 4.9
15 18 25.75 + 6 32.1
17 18 35.09 + 7 36.3 0.973 0.887 4.9
1987 October 3 (4460) Brian G. Marsden
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