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IAUC 5811: 1993l

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                                                  Circular No. 5811
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)


PERIODIC COMET HELIN-LAWRENCE (1993l)
     The following additional precise positions have been reported:

     1993 UT             R.A. (2000) Decl.        m1    Observer
     Apr. 21.48906   16 55 53.10   -15 47 10.3   17.0   Helin
          22.48906   16 55 42.75   -15 47 40.0            "
     May  27.64063   16 38 30.50   -16 17 37.7   17.0   Otomo
          27.65382   16 38 29.89   -16 17 39.0            "
     June  4.54489   16 32 59.18   -16 29 13.8   16     McNaught

E. Helin, K. Lawrence, and M. Nassir (Palomar).  0.46-m Schmidt
   telescope pre-discovery films.  Measurer J. Alu.
S. Otomo (Otomo Observatory, Kiyosato).  0.25-m f/3.4 reflector.
   Communicated by S. Nakano.
R. H. McNaught (Siding Spring).  Uppsala Southern Schmidt telescope.
   Observation made during total lunar eclipse.

     Orbital elements by B. G. Marsden, Center for Astrophysics,
from 9 observations, Apr. 21-June 4:

     T = 1993 June 18.0634 TT         Peri. = 161.0330
     e = 0.310126                     Node  =  92.2084  2000.0
     q = 3.081447 AU                  Incl. =   9.7937
       a =  4.466683 AU    n = 0.1044062    P =   9.440 years

1993 TT     R. A. (2000) Decl.   Delta     r    Elong. Phase    m1
June  2    16 34.76   -16 25.2   2.072   3.083  174.1    1.9   16.5
     12    16 27.92   -16 42.5   2.087   3.082  165.9    4.6   16.5
     22    16 21.88   -17 03.8   2.128   3.082  155.5    7.9   16.5
July  2    16 17.30   -17 29.5   2.193   3.082  145.1   10.9   16.6
     12    16 14.61   -17 59.6   2.279   3.084  135.1   13.4   16.7
     22    16 14.03   -18 33.6   2.383   3.087  125.6   15.5   16.8
Aug.  1    16 15.63   -19 11.1   2.501   3.091  116.6   17.1   16.9
     11    16 19.34   -19 51.2   2.629   3.095  108.0   18.1   17.0
     21    16 25.02   -20 32.8   2.764   3.101   99.8   18.8   17.1
     31    16 32.51   -21 14.9   2.904   3.108   92.0   18.9   17.2
Sept.10    16 41.60   -21 56.2   3.046   3.115   84.5   18.8   17.4


1993 June 4                    (5811)            Daniel W. E. Green

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