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IAUC 5023: 1990c

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                                                  Circular No. 5023
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


COMET LEVY (1990c)
     The following additional precise positions have been reported:

     1990 UT             R.A. (1950) Decl.        m1    Observer
     May  21.74792   23 55 08.70   +27 35 32.8    11    Seki
          21.78854   23 55 10.08   +27 35 40.2            "
          24.74774   23 56 48.63   +27 44 52.5    11      "
          26.40382   23 57 41.72   +27 50 03.9          Belmas
          26.81968   23 57 54.62   +27 51 27.4          McNaught

T. Seki (Geisei).
J. Belmas (Victoria).  Communicated by J. Tatum.
R. H. McNaught (Siding Spring).  Uppsala Schmidt telescope.  Well
condensed.

     The following parabolic orbital elements by the undersigned,
from 10 observations May 21-26, are very preliminary:

     T = 1990 Nov. 10.79 ET           Peri. = 248.18
                                      Node  = 143.36    1950.0
     q = 0.9370 AU                    Incl. = 129.28

     1990 ET      R.A. (1950) Decl.     Delta      r       m1
     May   9    23 47.28    +26 57.8    3.546    2.930    10.2
          14    23 50.50    +27 12.1
          19    23 53.55    +27 27.1    3.319    2.812    10.0
          24    23 56.40    +27 42.6
          29    23 59.02    +27 58.3    3.072    2.693     9.7
     June  3     0 01.37    +28 14.1
           8     0 03.41    +28 29.7    2.807    2.572     9.3
          13     0 05.09    +28 44.8
          18     0 06.33    +28 59.3    2.528    2.451     8.9
          23     0 07.06    +29 12.6
          28     0 07.17    +29 24.1    2.237    2.328     8.5

     Total visual magnitude estimates (cf. IAUC 5017):  May 22.89 UT,
10.3 (A. Pearce, Scarborough, W.A., 0.20-m reflector); 23.08, 11.7
(J. Shanklin, Cambridge, England, 0.3-m refractor); 23.90, 10.3
(Pearce); 24.90, 10.2 (Pearce); 26.04, 10.4 (J.-C. Merlin, Le
Creusot, France, 0.40-m reflector).


1990 May 26                    (5023)             Daniel W. E. Green

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