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IAUC 2933: 1976a

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                                                  Circular No. 2933
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
Western Union: RAPID SATELLITE CAMBMASS


COMET BRADFIELD (1976a)
     The following precise positions have been reported:

     1976 UT             R. A. (1950) Decl.        Observer
     Feb. 21.40035     2 03 08.65   -32 09 11.6    Austin
          21.40922     2 03 11.64   -32 08 50.9      "
          22.36369     2 07 20.32   -31 31 41.0    Gilmore
          22.39566     2 07 28.78   -31 30 26.0    Austin
          29.49792     2 41 00.32   -25 31 13.2    Candy
     Mar.  2.54688     2 51 37.85   -23 14 01.6    Jekabsons
           4.54514     3 02 29.19   -20 42 37.6    Harwood
           4.55833     3 02 32.91   -20 41 36.3      "
           8.51806     3 25 38.11   -14 41 59.6    Candy

R. R. D. Austin (Mount John University Observatory) and A. C.
   Gilmore (Owhiro Bay, Wellington).  Measurer: P. M. Kilmartin.
M. P. Candy, P. Jekabsons and D. Harwood (Perth Observatory).

     V. Guth, Ondrejov Observatory, notes that the earth was in the
vicinity of the ascending node of the comet's orbit on Feb. 29.9 UT
(r_c - r_e = +0.017 AU).  The apparent radiant of associated meteors
would have been at R.A. = 12o, Decl. = -64o; geocentric velocity 33 km/s.

     Extension of the ephemeris on IAUC 2921:

     1976 ET     R. A. (1950) Decl.     Delta     r      m1
     Apr.  2     6 43.16    +37 59.0    0.486   1.087    9.3
           7     7 29.00    +43 56.9
          12     8 11.71    +47 34.4    0.628   1.203   10.3
          17     8 49.75    +49 31.7
          22     9 22.70    +50 21.8    0.803   1.327   11.3
          27     9 50.90    +50 28.3
     May   2    10 15.03    +50 06.7    0.993   1.456   12.1

     Selected total visual magnitude estimates: Feb. 25.04 UT, 9.5
(J. Armstrong, Powder Springs, Georgia, 20-cm reflector); Mar. 2.42,
10 (B. Sumner, Pallarenda, Queensland, 15-cm reflector); 5.12, 9.5
(A. Hale, Alamogordo, New Mexico, 32-cm reflector); 13.15, 8.5 (J.
Mikolas, Chico, California, 20-cm reflector); 18.0, 10.1 (J. Bortle,
Brooks Observatory, 32-cm reflector); 20.1, 10.9 (K. Simmons,
Switzerland, Florida, 20-cm reflector); 24.03, 9.9 (Bortle).


1976 March 26                  (2933)              Brian G. Marsden

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