Central Bureau for Astronomical Telegrams
IAUC 3172: 1978c
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Read IAUC 3173
Circular No. 3172
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Cable Address: SATELLITES, NEWYORK Telex: 921428
Telephone: (617) 864-5758
COMET BRADFIELD (1978c)
The following precise positions were obtained by J. Johnson
and M. P. Candy with the 33-cm astrograph at the Perth Observatory,
Bickley. Measurers: Candy and P. Jekabsons.
1978 UT R. A. (1950) Decl.
Feb. 6.84340 18 35 14.33 -48 36 49.0
6.86111 18 35 21.56 -48 36 06.9
7.85486 18 42 03.88 -47 55 21.5
7.86161 18 42 06.66 -47 55 03.1
8.86215 18 48 49.02 -47 11 39.4
The following sets of elements have been determined by Candy
and by D. Herald, Kambah, near Canberra:
M. P. Candy D. Herald
(5 obs. Feb. 6-8) (5 obs. Feb. 5-8)
T = 1978 Mar. 17.964 1978 Mar. 18.109 ET
Peri. = 44.740 42.31
Node = 261.254 262.07 1950.0
i = 50.214 49.76
q = 0.46486 0.4976 AU
The following ephemeris has been calculated by J. Ashbrook,
and Telescope, from Herald's elements. Differences in the
sense Herald minus Candy are: Feb. 21, dR.A. = -0m.4, dDecl. = -5'; Mar. 3,
-1m.3, -20'; 13, -2m.7, -40'; 23, -5m.3, -46'.
1978 ET R. A. (1950) Decl. Delta r Elong. m1
Feb. 6 18 29.52 -49 09.6
11 19 02.90 -45 31.2 1.329 0.936 44.7 6.8
16 19 34.62 -40 55.4
21 20 04.56 -35 21.3 1.232 0.764 38.3 5.8
26 20 32.97 -28 51.7
Mar. 3 21 00.41 -21 33.9 1.189 0.606 30.6 4.7
8 21 27.69 -13 41.2
13 21 55.73 - 5 35.2 1.216 0.499 23.5 3.9
18 22 25.29 + 2 14.9
23 22 56.43 + 9 18.9 1.312 0.498 19.3 4.1
m1 = 6.5 + 5 log Delta + 10 log r
1978 February 10 (3172) Brian G. Marsden
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