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IAUC 5382: 1991b1; 1991be; 1991n

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                                                  Circular No. 5382
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

COMET 1991b1
     Carolyn and Eugene Shoemaker and David H. Levy report their
discovery, on 0.46-m Schmidt films taken at Palomar, of a fast-
moving comet.  Approximate positions follow:

     1991 UT           R.A. (1950) Decl.        m1
     Nov.  7.190       0 07.0      - 1 35      13
           9.193       0 11.5      + 1 50
          10.156       0 14.3      + 3 33

The comet is strongly condensed on the films, with a coma of diameter
about 30".  On Nov. 10.16, there was a tail about 1' long toward
the east; at about this same time, Levy estimated m1 = 12.7 visually
in a 0.15-m reflector.

     R. H. McNaught, Anglo-Australian Observatory, reports his
discovery of a supernova (mag about 18.5) on a J plate taken by M. J.
Drinkwater with the U.K. Schmidt Telescope on Nov. 7.4 UT.  The
supernova is situated towards the edge of the galaxy, offset from the
center by 7" west and 1" south.  Coordinates for the supernova are
R.A. = 21h30m03s.90, Decl. = -42 26'05".3 (equinox 1950.0, uncertainty
0".5 in each coordinate).  Images appear on U.K. Schmidt J
plates taken by S. M. Hughes on Oct. 31.4 and Nov. 1.4 when it was
somewhat fainter at mag about 19.  A nearby star of mag about 17.5
is at R.A. = 21h30m08s.27, Decl. = -42 25'48".8.

     Total visual magnitude estimates (cf. IAUC 5362):  Oct. 12.25
UT, 9.8 (R. Keen, Mt. Thorodin, CO, 0.32-m reflector; 4' tail);
14.11, 9.0 (V. F. de Assis Neto, Sao Francisco de Oliveira, Brazil,
10x70 binoculars); 15.99, 9.5 (A. Pereira, Cabo da Roca, Portugal,
0.15-m reflector); 20.06, 9.9 (B. H. Granslo, Fjellhamar, Norway,
0.20-m reflector); 29.83, 9.7 (H. Mikuz, Ljubljana, Yugoslavia,
20x60 binoculars); Nov. 1.89, 9.3 (M. Cavagna, Passo San Marco,
Italy, 20x80 binoculars); 3.26, 9.2 (C. S. Morris, Pine Mountain
Club, CA, 20x80 binoculars; 20' tail in p.a. 270 deg); 7.98, 9.6 (J.
Carvajal, Madrid, Spain, 0.30-m reflector); 9.17, 9.3 (C. Spratt,
Victoria, BC, 0.20-m reflector).

1991 November 10               (5382)             Daniel W. E. Green

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