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IAUC 4875: 1989v

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IAUC number 

                                                Circular No. 4875
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 HELIN-ROMAN-ALU (1989v)
     The following precise positions have been reported:

     1989 UT             R.A. (1950) Decl.        m1    Observer
     Oct.  3.56269    0 05 40.90   - 5 17 04.2          McNaught
           4.22437    0 02 47.54   - 4 49 21.9          Balam
           4.27160    0 02 34.81   - 4 47 15.9            "
           4.60243    0 01 06.61   - 4 33 00.1    14    Endate
           4.61979    0 01 01.71   - 4 32 11.3            "
           4.70541    0 00 38.16   - 4 28 08.1          McNaught
           5.69977   23 56 07.85   - 3 43 45.0            "
           6.24444   23 53 37.76   - 3 19 02.3          Helin
           6.26736   23 53 31.33   - 3 18 01.7            "
           9.36319   23 38 36.89   - 0 46 42.4          Tatum

R. H. McNaught (Siding Spring).  Uppsala Southern Schmidt telescope.
D. Balam and J. Tatum (Victoria).
K. Endate (Kitami).  Measured by K. Watanabe.
E. Helin, B. Roman, J. Alu, and R. Bambery (Palomar).  0.46-m
  Schmidt telescope.  Measured by Roman.

     Parabolic orbital elements from 12 observations, Oct. 1-9:

     T = 1989 Dec. 15.820 ET          Peri. =  67.917
                                      Node  =   7.794   1950.0
     q = 1.05005 AU                   Incl. =  46.331

     1989 ET      R.A. (1950) Decl.     Delta      r       m1
     Oct. 11    23 30.38    + 0 39.3    0.528    1.496    11.4
          16    23 04.03    + 5 21.1
          21    22 36.81    +10 19.0    0.496    1.391    10.9
          26    22 09.96    +15 13.7
          31    21 44.55    +19 49.4    0.513    1.293    10.7
     Nov.  5    21 21.26    +23 57.6
          10    21 00.36    +27 36.7    0.562    1.206    10.6
          15    20 41.75    +30 49.2
          20    20 25.16    +33 39.3    0.625    1.135    10.5
          25    20 10.26    +36 11.3
          30    19 56.68    +38 29.0    0.689    1.083    10.5


1989 October 12                (4875)             Daniel W. E. Green

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