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IAUC 5185: 1991f; 1991E; 1991D; 1990c

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                                                  Circular No. 5185
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

     C. S. Shoemaker, E. M. Shoemaker, and D. H. Levy report their
discovery on Palomar 0.46-m Schmidt films of yet another comet, as
given below.  The object is diffuse with a faint tail in p.a. about
280 deg.

     1991 UT           R.A. (1950) Decl.        m1
     Feb.  9.455      12 09.5      + 2 31      17
          11.272      12 08.8      + 2 43

     R. H. McNaught, University of Adelaide, reports his discovery
on a U.K. Schmidt Telescope plate taken Feb. 7.47 UT by M. Hartley
of an apparent supernova of magnitude R about 19 in an anonymous
galaxy.  The position of the supernova is R.A. = 6h34m14s.89, Decl.
-65 30'39".1 (equinox 1950.0), or 6".3 east and 5".0 north of the
galaxy's center.  No image appears in this position on the ESO B, R,
SERC I, J, and several other J plates.  A nearby star of mag about
16 is at R.A. = 6h34m10s.63, Decl. = -65 30'09".8.

     R. Kirshner, Center for Astrophysics, communicates:  "Spectra
of SN 1991D obtained on Feb. 10 and 11 by J. Huchra and J. McAfee at
the Multiple Mirror Telescope indicate that this appears to be a
type-Ib or -Ic supernova.  Although the maxima at 390, 415, 440, and
490 nm are like those seen in type-Ia supernovae, no absorption at
615 nm is detected.  The supernova is offset 13".1 east and 8".5
south of the galaxy nucleus at R.A. = 13h38m32s.5, Decl. = -14 23'39"
(equinox 1950.0).  The galaxy redshift is about 12 300 km/s.  When
combined with the apparent magnitude reported on IAUC 5182, this
implies that SN 1991D is as luminous as a type-Ia supernova."

COMET LEVY (1990c)
     Total visual magnitude estimates (cf. IAUC 5172):  Jan. 24.50
UT, 7.6 (A. Hale, Las Cruces, NM, 10x50 binoculars); Feb. 6.35, 7.6
(Hale); 9.62, 7.9 (M. Ohkuma, Mt. Fuji, Japan, 10x70 binoculars).

1991 February 11               (5185)             Daniel W. E. Green

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