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IAUC 5117: 1990ad; 1990 SS

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                                                  Circular No. 5117
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
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
MARSDEN or GREEN@CFA.BITNET    MARSDEN or GREEN@CFAPS2.SPAN


SUPERNOVA 1990ad IN ANONYMOUS GALAXY
     R. H. McNaught, University of Adelaide, reports his discovery
of an apparent supernova of mag about 19.5 located at R.A. =
22h40m05s.59, Decl. = +1 02'24".2 (equinox 1950.0), or 5".2 west
and 2".6 north of the stellar nucleus of an anonymous galaxy, near
the edge of the face-on disk.  The supernova was found on a J plate
taken by M. Hartley on Oct. 9.5 UT with the 1.2-m U.K. Schmidt
Telescope of the Anglo-Australian Observatory.  Confirmation was
obtained by Q. A. Parker and H. Hartley on an R plate taken Oct.
11.5 with the same telescope.  No star appears in this position on
previous UKST J and R films.


1990 SS
     Additional observations from J. V. Scotti at Kitt Peak:

     1990 UT             R.A. (1950) Decl.        V
     Oct.  9.11619   23 26 12.79   + 4 51 25.1   19.0
           9.12289   23 26 11.65   + 4 51 29.6
           9.13639   23 26 09.28   + 4 51 37.8

     Improved orbital elements by G. V. Williams, Center for
Astrophysics, from observations Sept. 25-Oct. 9:

     T = 1991 Feb.  1.339 ET          Peri. = 115.624
     e = 0.46748                      Node  = 359.415   1950.0
     q = 0.89661 AU                   Incl. =  18.904
       a =  1.68372 AU     n = 0.451126     P =   2.18 years

     1990 ET      R.A. (1950) Decl.     Delta      r       V
     Oct. 16    23 06.76    + 6 03.1    0.538    1.476    18.4
          21    22 53.59    + 6 57.1
          26    22 41.74    + 7 53.0    0.536    1.407    18.6
          31    22 31.50    + 8 51.1
     Nov.  5    22 23.02    + 9 51.6    0.546    1.338    18.7
          10    22 16.29    +10 55.1
          15    22 11.29    +12 02.1    0.562    1.267    18.9
          20    22 07.90    +13 13.2
          25    22 05.98    +14 29.2    0.575    1.198    19.0


1990 October 13                (5117)             Daniel W. E. Green

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