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IAUC 3563: 1980s; 1980h

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                                                  Circular No. 3563
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


COMET LOVAS (1980s)
     The following precise positions have been reported:

     1981 UT             R. A. (1950) Decl.        m1    Observer
     Jan.  6.44722     8 58 18.45   +33 42 25.1   17     Bus
           9.27706     8 55 16.55   +33 39 23.9   17     Schwartz

S. J. Bus (Palomar Mountain Observatory).  0.46-m Schmidt telescope.
   Measurer: E. Howell.   Communicated by E. Helin.
G. Schwartz and C.-Y. Shao (Harvard College Observatory, Agassiz
   Station).  1.5-m reflector.  Measurer: Shao.

     The following parabolic orbital elements, by the undersigned,
satisfy the observations (excluding that of 1980 Dec. 15) within 2":

       T = 1980 Sept. 23.5481 ET  Peri. =  59.0329
                                  Node  = 352.8579   1950.0
       q = 1.467000 AU            Incl. =  10.3930

     1980/81 ET  R. A. (1950) Decl.     Delta     r      m1
     Nov.  7     8 38.90    +34 27.0
          17     8 55.69    +34 02.6    1.070   1.654   16.3
          27     9 06.83    +33 46.3
     Dec.  7     9 12.28    +33 40.2    1.062   1.797   16.7
          17     9 12.21    +33 41.8
          27     9 07.29    +33 45.2    1.089   1.962   17.1
     Jan.  6     8 58.64    +33 42.8
          16     8 47.98    +33 27.3    1.186   2.144   17.7
          26     8 37.23    +32 55.6
     Feb.  5     8 27.97    +32 08.7    1.380   2.334   18.4
          15     8 21.28    +31 10.7
          25     8 17.57    +30 06.2    1.671   2.531   19.1
     Mar.  7     8 16.76    +28 58.9
          17     8 18.55    +27 50.9    2.043   2.730   19.9
          27     8 22.52    +26 43.4
     Apr.  6     8 28.24    +25 36.6    2.472   2.931   20.6


PERIODIC COMET TUTTLE (1980h)
     Total visual magnitude estimates: 1980 Dec. 15.53 UT, 7.4 (D.
Machholz, San Jose, CA, 0.25-m reflector); 27.26, 7.5 (V. F. de
Assis Neto, Sao Francisco de Oliveira, Brazil, 0.10-m reflector).


1981 January 12                (3563)              Brian G. Marsden

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