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IAUC 4711: 1989a

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                                                  Circular No. 4711
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)
     Further precise positions have been reported as follows:

     1989 UT             R.A. (1950) Decl.        m1    Observer
     Jan.  4.80771   13 51 09.79   +10 19 27.8          Niijima
           4.81127   13 51 10.23   +10 19 32.0            "
           4.83212   13 51 12.78   +10 19 56.9          Shimoda
           4.83802   13 51 13.33   +10 20 04.5            "
           4.84111   13 51 13.78   +10 20 07.5          Niijima
           4.84558   13 51 14.30   +10 20 12.2            "
           5.22692   13 51 59.91   +10 27 42.4    12    Shanklin
           5.79271   13 53 07.87   +10 38 56.3          Koishikawa
           5.79670   13 53 08.22   +10 39 01.7          Yusa
           5.80556   13 53 09.34   +10 39 09.5            "
           5.80729   13 53 09.53   +10 39 14.3          Koishikawa
           5.81771   13 53 10.76   +10 39 28.4            "
           5.83108   13 53 12.13   +10 39 42.9    11    Seki
           6.84896   13 55 13.13   +11 00 06.0          Koishikawa
           6.85903   13 55 14.31   +11 00 17.1            "
          10.26294   14 01 52.05   +12 10 38.4    13    Shanklin

T. Niijima and K. Kanai (Ojima).  Measurer K. Kanai.
M. Shimoda and K. Kanai (Kamihoriguchi, Japan).  Measurers K. Kanai and
   T. Niijima.  Long. = +139 19 35, Lat. = +36 14 54.
J. D. Shanklin (University of Cambridge Observatories).
M. Koishikawa (Ayashi Station).  Measurer S. Kasahira.
T. Yusa (Sendai Observatory).  0.41-m reflector.
T. Seki (Geisei).  0.6-m reflector.  Communicated by T. Kobayashi.

     Improved parabolic orbital elements from 27 observations Jan. 2-10:

     T = 1988 Oct. 29.194 ET          Peri. = 349.701
                                      Node  = 155.895   1950.0
     q = 1.86114 AU                   Incl. =  51.911

     Total visual magnitude estimates: Jan. 10.49 UT, 10.9 (A. Hale,
Las Cruces, NM, 0.41-m reflector); 10.50, 11.2 (G. W. Kronk,
Troy, IL, 0.33-m reflector).


1989 January 12                (4711)              Brian G. Marsden

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