Central Bureau for Astronomical Telegrams
IAUC 3933: 1984a; R CrB; OJ 287
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Read IAUC 3934
Circular No. 3933
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
elliptical elements, derived form 24 observations Jan. 9-Mar. 13:
T = 1983 Dec. 27.8562 ET
Peri. = 219.2160 e = 0.954814
Node = 356.1820 1950.0 a = 30.059560 AU
Incl. = 51.7918 n = 0.0059804
q = 1.358271 AU P = 164.8 years
1984 ET R.A. (1950.0) Decl. p r m1
Mar. 21 22 35.89 -52 58.1 2.158 1.799 14.2
31 23 05.12 -50 38.7
Apr. 10 23 28.93 -48 33.0 2.266 1.981 14.7
20 23 48.46 -46 46.1
30 0 04.51 -45 20.9 2.336 2.173 15.2
May 10 0 17.53 -44 18.8
20 0 27.76 -43 40.2 2.364 2.372 15.6
30 0 35.26 -43 24.8
June 9 0 39.94 -43 32.0 2.358 2.572 16.0
19 0 41.61 -43 59.7
29 0 40.01 -44 44.6 2.339 2.774 16.3
July 9 0 34.83 -45 41.7
19 0 25.91 -46 43.5 2.337 2.975 16.6
29 0 13.29 -47 40.8
Aug. 8 23 57.45 -48 23.0 2.392 3.174 16.9
18 23 39.43 -48 40.6
28 23 20.67 -48 27.9 2.538 3.372 17.3
R CORONAE BOREALIS
Visual magnitude estimates: Mar. 5.9 UT, 11.5 (M. Verdenet,
Bourbon-Lancy, France); 7.9, 11.6 (Verdenet); 12.2, 10.7 (E. Mayer,
Barberton, OH); 12.9, 10.5 (Verdenet); 25.2, 9.8 (C. Stephan,
Solon, OH); 28.2, 9.6 (K. Medway, Southampton, England).
OJ 287
Visual magnitude estimates by M. Verdenet, Bourbon-Lancy,
France: Feb. 23.8 UT, 14.4; Mar. 4.8, 13.4; 5.8, 13.3; 6.8, 13.3;
7.8, 13.2; 9.8, 13.3.
1984 March 30 (3933) Brian G. Marsden
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