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IAUC 3064: 1977e

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                                                  Circular No. 3064
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     Telex: 921428
Telephone: (617) 864-5758


COMET HELIN (1977e)
     The following precise positions have been reported:

     1977 UT             R. A. (1950) Decl.        m1    Observer
     Apr. 16.39236    12 39 15.74   - 6 40 01.3          Helin
          16.40972    12 39 11.47   - 6 40 43.8            "
          17.18681    12 36 10.36   - 7 11 56.0            "
          17.47535    12 35 00.26   - 7 23 43.9            "
          18.18438    12 32 11.03   - 7 53 00.5            "
          18.47188    12 31 00.16   - 8 04 56.6            "
          18.8705     12 29 23.6    - 8 21 41     15     Clausen
          18.9268     12 29 09.7    - 8 24 02              "
          19.19688    12 28 03.59   - 8 35 29.6          Helin
          19.25243    12 27 49.50   - 8 37 52.7          Giclas
          19.27118    12 27 44.81   - 8 38 40.9            "
          19.8418     12 25 23.0    - 9 03 05     15     Clausen
          19.8536     12 25 19.9    - 9 03 31              "

E. Helin, B. Bus, P. Bormann, D. Zelinsky [incorrectly spelled on
   IAUC 3062] and T. Lauer (Palomar Mountain Observatory).  46-cm
   Schmidt telescope.  Measurers: Bus and Zelinsky.
Clausen, Augustesen, Jensen, Gjoe and Petersen (Copenhagen Observatory,
   Brorfelde Station).  50-cm Schmidt telescope.  Existence
   of tail uncertain.  Measurer: J. V. Clausen.
H. L. Giclas (Lowell Observatory).  Measurer: M. L. Kantz.

     The following parabolic elements are by the undersigned.  It
is not impossible that the comet is a short-period one.

       T = 1977 June 30.91 ET    Peri. = 249.51
                                 Node  =  19.45   1950.0
       q = 1.1143 AU             Incl. =  43.02

     1977 ET     R. A. (1950) Decl.     Delta     r      m1
     Apr. 22    12 16.22    -10 37.6
          27    11 53.88    -14 27.1    0.573   1.515   14.6
     May   2    11 30.62    -18 23.0
           7    11 07.23    -22 14.5    0.561   1.416   14.3
          12    10 44.48    -25 53.1
          17    10 22.96    -29 14.1    0.582   1.327   14.1

              m1 = 14.0 + 5 log Delta + 10 log r


1977 April 22                  (3064)              Brian G. Marsden

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