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IAUC 5097: 1990k

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                                                  Circular No. 5097
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


PERIODIC COMET HOLT-OLMSTEAD (1990k)
     The following precise positions have been reported:

     1990 UT             R.A. (1950) Decl.        m1    Observer
     Sept.14.34983    1 39 13.66   + 7 37 53.2   17.2   Holt
          14.38507    1 39 12.73   + 7 38 10.4            "
          16.47205    1 38 16.42   + 7 55 48.9   17.0     "
          16.50451    1 38 15.29   + 7 56 04.2            "
          18.42344    1 37 16.14   + 8 12 02.2   17.0     "
          18.45625    1 37 14.93   + 8 12 17.9            "
          19.22266    1 36 49.48   + 8 18 37.9          McCrosky
          19.24689    1 36 48.60   + 8 18 49.8            "
          20.26812    1 36 12.43   + 8 27 05.8          Balam
          20.28479    1 36 11.83   + 8 27 14.0            "
          20.40602    1 36 07.46   + 8 28 23.1   17.0   Holt
          20.48281    1 36 04.44   + 8 28 59.8            "
          20.67986    1 35 57.38   + 8 30 36.6   17     Seki
          21.20037    1 35 37.95   + 8 34 49.7          McCrosky
          21.21500    1 35 37.38   + 8 34 57.0            "

H. E. Holt, C. M. Olmstead, H. R. Holt and J. A. Brown (Palomar).  0.46-m
   Schmidt.  Measurer E. Bowell.
R. E. McCrosky, C.-Y. Shao, B. G. Marsden and G. V. Williams (Oak
   Ridge).  1.5-m reflector.  Measurer McCrosky.
D. Balam (Victoria).
T. Seki (Geisei).

     The following preliminary orbital elements, by B. G. Marsden,
Center for Astrophysics, are from 13 observations Sept. 14-21:

     T = 1990 Sept.28.105 ET          Peri. =   0.030
     e = 0.39577                      Node  =  14.609   1950.0
     q = 2.03824 AU                   Incl. =  14.723
       a =  3.37326 AU     n = 0.159085     P =   6.20 years

     1990 ET      R.A. (1950) Decl.     Delta      r       m1
     Sept.16     1 38.50    + 7 51.9
          26     1 32.26    + 9 13.3    1.076    2.038    17.3
     Oct.  6     1 23.46    +10 28.6
          16     1 13.35    +11 36.6    1.047    2.043    17.2


1990 September 21              (5097)             Daniel W. E. Green

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