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IAUC 4141: 1985 WA; 1985R

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                                                  Circular No. 4141
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 617-495-7244/7440/7444


1985 WA
     E. and C. Shoemaker report their discovery of a fast-moving
object with the 0.46-m Schmidt telescope at Palomar Mountain.

       1985 UT            R.A.   (1950.0)   Decl.      Mag.

       Nov. 16.26198     1 34 21.44    +17 40 32.6      17
            18.30868     1 40 27.95    +20 23 37.0
            19.38333     1 43 41.81    +21 44 44.8

     Preliminary orbital elements by C. M. Bardwell (with a = 2.6
AU, assumed) indicate this to be likely an Amor-type minor planet:
T = 1985 Nov. 1.138 ET, Peri. = 351.12, Node = 43.33, Incl. = 9.35 (equinox
1950.0), e = 0.5665 (a and e are very uncertain).

     1985 ET     R.A. (1950.0) Decl.      p        r      Mag.

     Nov. 19     1 42.57    +21 16.4    0.175    1.148    17.0
          21     1 48.66    +23 41.1
          23     1 54.81    +25 54.6    0.189    1.158    17.2
          25     2 00.99    +27 57.0
          27     2 07.19    +29 48.4    0.204    1.170    17.4
          29     2 13.39    +31 29.2
     Dec.  1     2 19.57    +32 59.8    0.222    1.184    17.7
           3     2 25.71    +34 21.0
           5     2 31.82    +35 33.3    0.243    1.199    17.9


SUPERNOVA 1985R IN IC 1809
     R. Kirshner, Center for Astrophysics, writes:  "J. Peters,
using the Whipple Observatory 1.5-m telescope, has discovered a
supernova on Nov. 16.4 UT in the interacting pair of galaxies
catalogued as IC 1809 (= UGC 01996 = III Zwicky 48).  The supernova is
located 21" west and 8" north of IC 1809, which is the south preceeding
of the pair of galaxies at R.A. = 2h28m8, Decl. = +22P42' (equinox
1950.0).  Spectra show a broad P-Cyg profile at H-alpha, with a half-
width from the blue edge of the absorption to the red edge of the
emission of 9000 km/s, characteristic of a type-II supernova a few
weeks after maximum light.  I. R. G. Wilson has obtained photometry
with the 0.60-m telescope (+ CCD) that show V ~ 17.4 on Nov. 16.4.
Since the redshift for IC 1809 is ~ 5870 km/s, the magnitude is
consistent with an absolute magnitude near -18 (for H = 50) and
with the type-II classification."


1985 November 22               (4141)            Daniel W. E. Green

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