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IAUC 2721: 1974h

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                                                  Circular No. 2721
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 BENNETT (1974h)
     Further approximate observations, reported by W. A. Bradfield
(Adelaide) and by J. Hers and R. Smith (Pretoria), give m1 = 8 during
Nov. 14.7-15.1 UT.  The following precise positions have been
reported:

     1974 UT             R. A. (1950) Decl.        m1    Observer
     Nov. 14.85382    11 17 08.43   -35 05 34.4    8     Seki
          14.85868    11 17 10.03   -35 05 51.2            "
          17.65486    11 18 11.19   -37 24 01.5    8     Lewis
          19.64025    11 19 17.41   -39 22 51.9    8     Gibb

T. Seki (Kochi Observatory, Geisei Station).  Comet diffuse with
   condensation.  Communicated by K. Osawa.
B. M. Lewis, Gibb and Pamela M. Kilmartin (Carter Observatory).
   Astrograph plates.

     The following parabolic elements, by the undersigned, should
be reasonably satisfactory, but the ephemeris is necessarily
uncertain for the time when the comet is closest to the earth:

       T = 1974 Nov. 30.488 ET   Peri. = 324.669
                                 Node  =  51.324   1950. 0
       q = 0.86421 AU            Incl. = 134.579

     1974 ET     R. A. (1950) Decl.     Delta     r      m1
     Nov. 19    11 18.87    -38 42.4    0.824   0.890    8.1
          24    11 23.63    -45 13.7
          29    11 37.63    -56 22.3    0.482   0.865    6.8
          30    11 43.60    -59 31.7
     Dec.  1    11 52.10    -63 06.1    0.422   0.864    6.5
           2    12 04.96    -67 07.7
           3    12 26.2     -71 35.9    0.371   0.865    6.2
           4    13 06.4     -76 21.6
           5    14 36.8     -80 41.4    0.330   0.868    6.3
           6    17 38.8     -81 56.5
           7    20 05.2     -77 58.7    0.307   0.873    5.3
           8    21 08.9     -71 31.0
           9    21 39.33    -64 20.2    0.304   0.878    5.9

                m1 = 9.0 + 5 log Delta + 10 log r


1974 November 21               (2721)              Brian G. Marsden

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