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IAUC 4823: 1989 OB; 1989N

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IAUC number 

                                                  Circular No. 4823
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


1989 OB
     A fast-moving asteroidal object has been discovered by Carolyn
Shoemaker with the 0.46-m Schmidt at Palomar.  Available observations:

     1989 UT             R.A. (1950) Decl.       Mag.   Observer
     July 29.37829   21 25 08.26   - 4 28 36.6   16.5   Shoemaker
          29.40938   21 25 08.72   - 4 27 34.2            "
          31.34583   21 25 30.05   - 3 28 59.5            "
     Aug.  1.11440   21 25 38.01   - 3 05 07.5          McCrosky
           2.09995   21 25 46.96   - 2 34 01.1            "

C. S. Shoemaker, E. M. Shoemaker and H. E. Holt (Palomar).  The
   first position is uncertain.
R. E. McCrosky and C.-Y. Shao (Oak Ridge Observatory).

     Orbital elements from four observations July 29-Aug. 2:

     T = 1989 Sept.27.63 ET           Peri. =  71.33
     e = 0.6002                       Node  = 290.01    1950.0
     q = 1.2122 AU                    Incl. =   8.39
       a =  3.0320 AU      n = 0.18669      P =   5.28 years

     1989 ET      R.A. (1950) Decl.     Delta      r        V
     July 23    21 23.51    - 7 26.7    0.452    1.444    15.8
          28    21 24.85    - 5 08.9
     Aug.  2    21 25.75    - 2 37.0    0.385    1.386    15.3
           7    21 26.34    + 0 09.0
          12    21 26.79    + 3 08.1    0.333    1.334    14.9
          17    21 27.30    + 6 18.6
          22    21 28.07    + 9 37.4    0.297    1.289    14.7
          27    21 29.37    +13 00.0
     Sept. 1    21 31.47    +16 21.7    0.274    1.254    14.7


SUPERNOVA 1989N IN NGC 3646
     Celina Mikolajczak reports her discovery of a possible supernova
on a pair of exposures obtained on June 30.2 UT by E. Helin, B. Roman,
A. Mejia and herself with the 0.46-m Palomar Schmidt.  The object,
of mag 14-15, is located at R.A. = 11h19m03s.36, Decl. = +20d25'57".3
(equinox 1950.0), at the southern tip of NGC 3646.  The object is not
present on similar films obtained in March or on the Palomar Sky Survey.


1989 August 2                  (4823)              Brian G. Marsden

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