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IAUC 5600: 1992q; CCO 1992

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                                                  Circular No. 5600
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@CFA or GREEN@CFA (.SPAN, .BITNET or .HARVARD.EDU)


COMET HELIN-LAWRENCE (1992q)
     Further precise positions have been reported as follows:

     1992 UT             R.A. (2000) Decl.       m1    Observer
     Aug. 31.34948    2 02 49.74   -13 22 08.7   15    Helin
          31.44045    2 02 46.22   -13 24 54.9           "
          31.69462    2 02 37.19   -13 32 49.2   15    Kojima
          31.70978    2 02 36.60   -13 33 17.3           "
          31.72118    2 02 36.05   -13 33 37.9   15    Seki
          31.73652    2 02 35.55   -13 34 07.3         Kojima

E. F. Helin, K. J. Lawrence, J. Alu and P. Rose (Palomar).  0.46-m
   Schmidt.  Measurer Rose.
T. Kojima (YGCO Chiyoda Station).  Communicated by S. Nakano.
T. Seki (Geisei).  Diffuse, strong condensation.  Communicated by Nakano.

     The following parabolic orbital elements, from nine observations
Aug. 29-31, are better determined than those of comet 1992p:

     T = 1993 Mar. 13.416 TT          Peri. = 270.795
                                      Node  = 194.829   2000.0
     q = 1.96951 AU                   Incl. = 107.405

1992 TT     R. A. (2000) Decl.     Delta      r    Elong. Phase      m1
Aug. 26     2 05.49    -10 43.9    2.362    3.053  124.7   15.8     15.2
     31     2 03.03    -13 11.3    2.265    3.012  129.6   15.0     15.1
Sept. 5     1 59.71    -15 51.1    2.177    2.970  134.3   14.1     14.9
     10     1 55.46    -18 42.4    2.099    2.930  138.4   13.2     14.8
     15     1 50.19    -21 43.5    2.032    2.889  141.7   12.5     14.6
     20     1 43.86    -24 52.0    1.977    2.849  143.7   12.0     14.5
     25     1 36.39    -28 04.5    1.934    2.809  144.1   12.1     14.4
     30     1 27.79    -31 16.8    1.904    2.769  142.9   12.6     14.3
Oct.  5     1 18.10    -34 24.4    1.888    2.730  140.0   13.6     14.2


CATALOGUE OF COMETARY ORBITS 1992
     Further to IAUC 5598, checks for the MS-DOS diskette should be
made out to "Central Bureau for Astronomical Telegrams".  Either 5.25-inch
and 3.5-inch diskettes are available for the same amount of $100.00.


1992 September 1               (5600)              Brian G. Marsden

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