Central Bureau for Astronomical Telegrams
IAUC 3922: 1984a; AM Her
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Read IAUC 3923
Circular No. 3922
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 (1984a)
M. P. Candy, Perth Observatory, communicates the following
additional precise positions by J. Johnston and P. Jekabsons:
1984 UT R.A. (1950.0) Decl. Observer
Jan. 12.82361 16 17 03.40 -49 49 48.7 Johnston
16.83362 16 38 41.93 -52 01 43.3 Jekabsons
20.82396 17 01 48.89 -53 58 30.6 "
23.81701 17 20 08.28 -55 15 16.4 "
24.81701 17 26 25.54 -55 38 47.7 "
25.82101 17 32 49.58 -56 01 13.8 "
27.83843 17 45 53.73 -56 42 46.6 "
The following improved parabolic orbital elements have been
derived by the undersigned from 12 observations Jan. 9-27:
T = 1983 Dec. 28.6060 ET Peri. = 219.8556
Node = 356.4779 1950.0
q = 1.369419 AU Incl. = 51.7377
1984 ET R.A. (1950.0) Decl. p r m1
Mar. 1 21 14.30 -57 32.1 2.043 1.647 13.7
11 21 59.39 -55 23.2
21 22 35.56 -53 01.2 2.176 1.816 14.3
31 23 04.71 -50 43.2
Apr. 10 23 28.42 -48 39.0 2.288 2.002 14.8
20 23 47.86 -46 53.8
30 0 03.81 -45 30.2 2.362 2.200 15.3
May 10 0 16.72 -44 29.8
20 0 26.83 -43 52.7 2.395 2.404 15.7
30 0 34.22 -43 38.7
June 9 0 38.79 -43 47.0 2.395 2.611 16.1
19 0 40.36 -44 15.3
29 0 38.68 -45 00.4 2.382 2.819 16.4
AM HERCULIS
Visual magnitude estimates by M. Verdenet, Bourbon-Lancy,
France: 1983 Dec. 5.8 UT, 13.6; 9.7, 14.6; 14.7, 14.2; 20.7, 14.5;
1984 Feb. 10.2, 14.4; 13.2, 14.5; 15.2, 14.4.
1984 March 8 (3922) Brian G. Marsden
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