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IAUC 4700: 1989a

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                                                  Circular No. 4700
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 YANAKA (1989a)
     The following precise positions have been reported:

     1989 UT             R.A. (1950) Decl.        m1    Observer
     Jan.  3.79757   13 49 08.10   + 9 59 49.3          Otomo
           3.83021   13 49 12.17   +10 00 28.2            "
           4.25556   13 50 03.01   +10 08 40.5          Buczynski
           4.71181   13 50 58.61   +10 17 37.5   11     Arai
           4.77049   13 51 05.36   +10 18 45.5   11     Hayakawa
           4.78142   13 51 06.80   +10 18 59.9   10.5   Seki
           4.78160   13 51 06.61   +10 18 57.9          Hayakawa
           4.79238   13 51 08.04   +10 19 12.0          Yamagishi
           4.83611   13 51 13.40   +10 20 04.4          Arai
           5.24928   13 52 02.80   +10 28 09.2          Manning
           5.26165   13 52 04.14   +10 28 24.3            "

S. Otomo (Yamamoto). 0.20-m reflector.  Measurer M. Koishikawa.
D. Buczynski (Conder Brow).  0.55-m reflector.
M. Arai and H. Mori (Yorii).  0.30-m f/3.8 reflector.
S. Hayakawa (YGCO Nagano Station).  0.25-m f/4.0 reflector.
T. Seki (Geisei).  0.60-m reflector.
Y. Yamagishi (Oosato).  0.20-m f/4.8 reflector.  Measurer S. Hayakawa.
B. Manning (Stakenbridge).  Communicated by G. M. Hurst.

     Parabolic orbital elements from ten observations Jan. 2-5:

     T = 1988 Nov.  5.37 ET           Peri. = 354.51
                                      Node  = 157.13    1950.0
     q = 1.9447 AU                    Incl. =  53.17

     1988/89      R.A. (1950) Decl.     Delta      r       m1
     Dec. 25    13 28.95    + 7 04.6    2.047    2.038    10.6
          30    13 39.36    + 8 30.6
     Jan.  4    13 49.54    +10 03.8    1.972    2.078    10.7
           9    13 59.45    +11 44.3
          14    14 09.05    +13 31.9    1.909    2.123    10.7
          19    14 18.28    +15 26.2
          24    14 27.12    +17 26.7    1.859    2.174    10.7
          29    14 35.51    +19 32.7
     Feb.  3    14 43.39    +21 43.5    1.824    2.230    10.8


1989 January 5                 (4700)              Brian G. Marsden

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