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IAUC 2777: 1975e

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                                                  Circular No. 2777
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


PERIODIC COMET SMIRNOVA-CHERNYKH (1975e)
     The following precise positions have been reported:

     1975 UT             R. A. (1950) Decl.        m1    Observer
     Apr.  9.89378     9 15 05.13   +23 43 23.3   15.5   Waterfield
          15.87903     9 16 03.16   +23 29 53.5          Chernykh
          15.95392     9 16 03.66   +23 29 39.4   15.5   Rutter
          30.55972     9 21 08.19   +22 44 28.2   15     Seki

R. L. Waterfield and G. H. Rutter (Woolston Observatory).  Measurer:
   Waterfield.  Diffuse coma with only slight condensation,
   about 30" in diameter.
N. S. Chernykh (Crimean Astrophysical Observatory).  Measurer:
   T. M. Smirnova.  Reduced at I.T.A., Leningrad.
T. Seki (Kochi Observatory, Geisei Station).

     Dr. G. R. Kastel', Institute for Theoretical Astronomy, Leningrad,
provides the following continuation to the ephemeris.  The
prediscovery ephemeris for the 1973/74 opposition is derived from
her work; the comet would have been of total magnitude perhaps 16.

   1973 ET    R. A. (1950) Decl.  m2    1973/74 ET R. A. (1950) Decl.  m2
   Sept.25     5 40.5   +22 40          Dec. 14     5 20.5   +23 45
   Oct.  5     5 43.8   +22 49   19.2        24     5 13.2   +23 48   18.7
        15     5 45.4   +22 58          Jan.  3     5 06.6   +23 51
        25     5 45.3   +23 07   19.0        13     5 01.1   +23 53   18.7
   Nov.  4     5 43.3   +23 16               23     4 57.2   +23 56
        14     5 39.6   +23 24   18.8   Feb.  2     4 55.2   +24 01   18.8
        24     5 34.2   +23 32               12     4 55.2   +24 08
   Dec.  4     5 27.7   +23 39   18.7        22     4 57.0   +24 16   18.9

     1975 ET     R. A. (1950) Decl.     Delta     r      m2
     May  28     9 39.19    +20 41.4
     June  7     9 47.88    +19 46.3    3.845   3.578   18.7
          17     9 57.43    +18 46.5
          27    10 07.67    +17 42.5    4.087   3.576   18.8
     July  7    10 18.47    +16 34.7
          17    10 29.73    +15 23.5    4.289   3.575   18.9
          27    10 41.34    +14 09.4

Corrigendum: On IAUC 2772, for  S. Waaland,  read  D. Waaland.


1975 May 9                     (2777)              Brian G. Marsden

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