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IAUC 2772: 1975e

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                                                  Circular No. 2772
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   m2   Observer
     Mar.  4.77955     9 23 41.01   +23 49 27.1 15-15.5     Smirnova
          14.76167     9 18 58.16   +24 02 10.5               "
          16.83757     9 18 11.12   +24 03 21.5               "
          30.80918     9 15 01.74   +23 59 00.0             Chernykh
     Apr.  3.83496     9 14 49.02   +23 53 59.0               "
           4.76546     9 14 48.85   +23 52 36.9               "
           4.82409     9 14 48.76   +23 52 31.3               "
           5.79145     9 14 49.82   +23 50 58.5               "
           6.64655     9 14 51.19   +23 49 32.6  15         Seki
           6.77053     9 14 51.69   +23 49 19.4             Chernykh
           7.79144     9 14 55.02   +23 47 31.5               "
          11.79280     9 15 19.46   +23 39 30.8 15-15.5       "
          17.19255     9 16 21.27   +23 26 34.0      ~18.0  Roemer
          17.20978     9 16 21.51   +23 26 31.1               "

T. M. Smirnova and N. S. Chernykh (Crimean Astrophysical Observatory).
   Measurer: Smirnova.  Reduced at the Institute for Theoretical
   Astronomy, Leningrad.  Communicated by G. R. Kastel'.
T. Seki (Kochi Observatory, Geisei Station).  From Orient. Astron.
   Assoc. Comet Bull. No. 103.
E. Roemer, R. A. McCallister and S. Waaland (University of Arizona).
   Steward Observatory's 229-cm reflector, Kitt Peak.  Condensation
   at apex of fanshaped coma extending 0'.1 to the southeast.
   Measurer: Carolyn McCarthy.

     Dr. Kastel' also provides the following elliptical elements,
determined by her from the 11 Crimean observations.  Perturbations
by Venus to Pluto were taken into account.  The elements (which are
the basis for the ephemeris on IAUC 2770) indicate that the comet
passed some 0.4 AU from Jupiter in 1963 and that before then a =
6.2 AU, e = 0.08.

       T = 1975 July 28.3852 ET   Epoch = 1975 Mar. 19.0 ET
   Peri. =  88.7813                   e =   0.142070
   Node  =  77.1197   1950.0          a =   4.162666 AU
   Incl. =   6.6417                   n =   0.1160504
       q =   3.571278 AU              P =   8.493 years


1975 April 30                  (2772)              Brian G. Marsden

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