Central Bureau for Astronomical Telegrams

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IAUC 5063: 1990U; 1990 OL; 1990f

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                                                  Circular No. 5063
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 1990U IN NGC 7479
     C. Pennypacker, S. Perlmutter and H. Marvin communicate: "The
Berkeley Automated Supernova Search reports the discovery of a
supernova 22" west and 54" south of the nucleus of NGC 7479 (R.A. =
23h02m26s, Decl. = +12d03'.1 (equinox 1950.0) and lying on a possible
H II region.  Images obtained on July 27.364, 27.365 and 27.408 UT
show the object at mag 16 +/-0.5.  The supernova was not present to
limiting mag 17.5 (90-percent-confidence limit) on an image obtained
on June 28."


1990 OL
     E. Helin reports her discovery of a minor planet with near-
opposition direct motion.  The following positions were measured by B.
Roman from exposures by Helin, Roman, K. Lawrence and J. Michaud
with the 0.46-m Schmidt telescope at Palomar:

     1990 UT             R.A. (1950) Decl.       Mag.
     July 22.42882   21 28 23.85   + 3 30 06.1   16.0
          22.45764   21 28 24.84   + 3 29 33.3
          23.36840   21 29 02.80   + 3 11 08.8
          23.39219   21 29 03.61   + 3 10 39.0

     The orbit is understandably extremely uncertain:

     T = 1990 Oct. 16.83 ET           Peri. = 247.72
     e = 0.5009                       Node  = 140.65    1950.0
     q = 0.9831 AU                    Incl. =  20.13
       a =  1.9696 AU      n = 0.35657      P =   2.76 years

     1990 ET      R.A. (1950) Decl.     Delta      r       V
     July 28    21 32.26    + 1 15.4    0.363    1.351    14.8
     Aug.  2    21 35.98    - 1 41.2
           7    21 40.27    - 5 48.4    0.275    1.282    13.8
          12    21 45.60    -11 29.6
          17    21 52.72    -19 11.4    0.205    1.216    12.8


PERIODIC COMET HONDA-MRKOS-PAJDUSAKOVA (1990f)
     Further total visual magnitude estimates by A. Pearce, Scarborough,
W.A. (0.41-m reflector): July 25.88 UT, 12.4, 27.88, 12.2.


1990 July 28                   (5063)              Brian G. Marsden

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