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IAUC 4890: 1989 UQ; P/SCHWASSMANN-WACHMANN 1

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                                                Circular No. 4890
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 UQ
     C. Pollas, Observatoire de la Cote d'Azur, reports his discovery
with the 0.9-m Schmidt telescope of a fast-moving asteroidal object:

     1989 UT             R.A. (1950) Decl.       Mag.
     Oct. 26.94097    1 30 52.71   + 3 34 04.6    14
          26.97685    1 30 41.68   + 3 32 47.0
          26.98659    1 30 38.65   + 3 32 26.1
          31.02257    1 11 04.83   + 1 09 21.7
          31.03646    1 11 00.76   + 1 08 53.4
          31.04271    1 10 58.92   + 1 08 40.7
          31.04965    1 10 56.98   + 1 08 27.9

     Very preliminary orbital elements by B. G. Marsden, Center for
Astrophysics, from the above observations:

     T = 1990 Mar. 2.954 ET           Peri. =  13.805
     e = 0.45019                      Node  = 187.357   1950.0
     q = 0.47230 AU                   Incl. =   2.713
       a =  0.85902 AU     n = 1.237944     P =   0.80 years

     1989 ET      R.A. (1950) Decl.     Delta      r       V
     Nov.  2     1 01.97    + 0 03.6    0.247    1.220    13.8
           4     0 53.14    - 0 59.7
           6     0 44.79    - 1 58.9    0.255    1.211    14.0
           8     0 36.95    - 2 53.7
          10     0 29.67    - 3 43.9    0.265    1.200    14.3
          12     0 22.93    - 4 29.5
          14     0 16.76    - 5 10.6    0.278    1.188    14.5
          16     0 11.13    - 5 47.4
          18     0 06.04    - 6 19.9    0.292    1.175    14.7


PERIODIC COMET SCHWASSMANN-WACHMANN 1
     Total visual magnitude estimates (cf. IAUC 4877):  Oct. 20.15
UT, 13.6 (R. A. Keen, Mt. Thorodin, CO, 0.32-m reflector); 23.14,
12.3 (Keen); 28.27, 13.3 (C. S. Morris, Pine Mountain Club, CA,
0.26-m reflector); 30.13, 12.8 (Morris).


1989 November 2                (4890)             Daniel W. E. Green

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