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IAUC 4907: 1989a1; beta Pic; CH Cyg

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                                               Circular No. 4907
Central Bureau for Astronomical Telegrams
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Telephone 617-495-7244/7440/7444 (for emergency use only)
TWX 710-320-6842 ASTROGRAM CAM     EASYLINK 62794505

     Knut Aarseth and Howard J. Brewington report their independent
discoveries of a new comet, with the following positions available:

     1989 UT           R.A. (1950) Decl.        m1       Observer
     Nov. 16.73       16 20        +29          8.5      Aarseth
          16.99       16 20        +27.6        9        Brewington
          17.70       16 18        +27.6                 Dale
          17.722      16 18.7      +27 25       8.2      Granslo
          17.74       16 17        +27.9        8        Lunde
          17.95       16 17.9      +27 37       8        Caruso
          17.97       16 17.5      +27 42                di Cicco
          17.98       16 17.5      +27 36       8.6      Green

K. Aarseth (Volde, Norway).  Communicated by R. Lunde.
H. J. Brewington (Newberry, SC).  0.40-m reflector.
H. Dale (Oslo, Norway).
B. H. Granslo and B. Pettersen (Institute of Theoretical
  Astrophysics, Blindern).  Coma diameter 1'-2'.
R. Lunde (Ulsteinvik, Norway).  Definite motion over 1 hr.
J. Caruso (Oak Ridge Observatory).  0.4-m reflector.  Comet diffuse.
D. di Cicco (Sudbury, MA).  0.28-m reflector.  Diffuse with
D. W. E. Green (Cambridge, MA).  0.20-m reflector.  Coma diameter
  about 1'.5.

     A. M. Lagrange-Henri, European Southern Observatory, reports:
"Observations of beta Pictoris at La Silla on Oct. 20 have revealed
the presence of strong, variable absorption components in the
Ca II (K) line.  Such components have not been observed in this
line since 1986.  This indicates that intense activity is occuring
in the surrounding disk.  Further observations are encouraged."

     Visual magnitude estimates:  Sept. 2.92 UT, 7.5 (J. D. Shanklin,
Cambridge, England); 26.99, 7.9 (A. Pereira, Cabo da Roca, Portugal);
Oct. 18.85, 8.2 (A. Mizser, Budapest, Hungary); Nov. 16.76, 9.2 (E.
Schweitzer, Strasbourg, France).

1989 November 17               (4907)             Daniel W. E. Green

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