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IAUC 2942: 1976a; V616 Mon (A0620-00)

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IAUC number 

                                                  Circular No. 2942
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 positions have been reported:

     1976 UT             R. A. (1950) Decl.        m1    Observer
     Mar.  2.42367     2 50 59.2    -23 22 58      9     Seki
           6.44098     3 13 15.4    -18 01 13              "
          30.79836     6 21 59.49   +34 22 11.2          Milet
     Apr.  4.12123     7 02.12      +40 45.4             Roemer
           4.12534     7 02.15      +40 45.7               "

T. Seki (Kochi Observatory, Geisei Station).  From Orient. Astron.
   Assoc. Comet Bull. No. 123.
B. Milet (Nice Observatory).
E. Roemer and L. M. Vaughn (Steward Observatory).  229-cm reflector.

     The following elements, by the undersigned, are from observations
Feb. 21 to Apr. 4.  A parabolic solution is unsatisfactory.

       T = 1976 Feb. 24.638 ET   Peri. = 313.003
       e = 0.99375               Node  = 160.094   1950.0
       q = 0.84781 AU            Incl. =  46.840

     1976 ET     R. A. (1950) Decl.     Delta     r      m1
     Apr. 22     9 21.93    +50 21.8
     May   2    10 14.38    +50 08.2    0.991   1.453   12.1
          12    10 53.40    +48 37.6
          22    11 23.72    +46 34.1    1.390   1.715   13.6
     June  1    11 48.54    +44 16.3
          11    12 09.82    +41 53.1    1.802   1.977   14.7
          21    12 28.75    +39 29.6
     July  1    12 46.10    +37 08.3    2.219   2.234   15.7

     Further selected total visual magnitude estimates: Mar. 17.05
UT, 9.1 (J. Armstrong, Powder Springs, Georgia, 20-cm reflector);
23.15, 9.5 (D. Machholz, Los Gatos, California, 25-cm reflector);
26.06, 10.0 (J. Bortle, Brooks Observatory, 32-cm reflector); 28.10,
9.9 (Armstrong); 31.05, 9.8 (Bortle); Apr. 5.08, 10.2 (Bortle).


V616 MONOCEROTIS (A0620-00)
     J. Bortle, Brooks Observatory, provides one final visual
magnitude estimate: Mar. 31.06 UT, 14.1.


1976 April 16                  (2942)              Brian G. Marsden

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