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IAUC 3460: 1980a

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                                                  Circular No. 3460
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
TWX 710-320-6842 ASTROGRAM CAM     Telephone 617-864-5758


PERIODIC COMET FORBES (1980a)
     H.-E. Schuster, European Southern Observatory, reports the
recovery of this comet.  Available positions are:

     1980 UT             R. A. (1950) Decl.        m1    Observer
     Mar. 12.26875    13 37.09      - 8 36.0     19-20   Schuster
          13.26042    13 36.8       - 8 37      19.5-20  Schwartz
          13.32389    13 36.7       - 8 36                 "
          14.21770    13 36.40      - 8 35.0             Schuster

H.-E. Schuster (European Southern Observatory).  Image somewhat
   diffuse, particularly on Mar. 14.
G. Schwartz and C.-Y. Shao (Harvard College Observatory, Agassiz
   Station).  Diffuse with possible condensation.

     The recovery indicates that the predicted ephemeris on MPC
5041 (elements on MPC 4773) requires correction by Delta-T = -0.58 day.
A corrected ephemeris follows:

     1980 ET     R. A. (1950) Decl.     Delta     r      m2
     Mar.  2    13 39.04    - 8 33.7    1.658   2.461   20.0
          12    13 37.20    - 8 36.6
          22    13 32.49    - 8 27.0    1.385   2.334   19.4
     Apr.  1    13 25.09    - 8 05.9
          11    13 15.59    - 7 36.1    1.204   2.206   18.8
          21    13 05.05    - 7 02.7
     May   1    12 54.92    - 6 32.7    1.123   2.080   18.4
          11    12 46.58    - 6 13.5
          21    12 41.17    - 6 10.8    1.127   1.956   18.2
          31    12 39.36    - 6 28.4
     June 10    12 41.33    - 7 07.3    1.182   1.839   18.0
          20    12 47.07    - 8 07.0
          30    12 56.35    - 9 25.9    1.256   1.731   17.9
     July 10    13 08.91    -11 01.4
          20    13 24.56    -12 51.0    1.330   1.636   17.8
          30    13 43.12    -14 51.2
     Aug.  9    14 04.46    -16 58.1    1.399   1.559   17.7
          19    14 28.52    -19 07.2
          29    14 55.19    -21 13.2    1.467   1.506   17.6
     Sept. 8    15 24.37    -23 10.0
          18    15 55.87    -24 51.6    1.543   1.481   17.6


1980 March 14                  (3460)              Brian G. Marsden

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