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IAUC 4697: 1989a; 1988r; (724)

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IAUC number 

                                                  Circular No. 4697
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)
     H. Kosai, Japanese National Astronomical Observatory, reports
that Tetsuo Yanaka has discovered another comet.  Available
observations follow:

     1989 UT             R.A. (1950) Decl.       m1     Observer
     Jan.  1.743     13 45.3       + 9 45        11     Yanaka
           2.738     13 46.9       + 9 40        11       "
           2.80208   13 47 07.64   + 9 40 46.1   11     Koishikawa
           2.81250   13 47 08.90   + 9 40 56.2            "
           3.567     13 48.7       + 9 54        10.7   Morris

T. Yanaka (Motegi, Tochigi).  25 x 150 binoculars.  Object diffuse
   with condensation, coma diameter about 2'.
M. Koishikawa (Sendai Astronomical Observatory, Ayashi Station).
C. S. Morris (near Mt. Wilson, CA).  0.26-m reflector.  Very diffuse,
   little condensation.


COMET YANAKA (1988r)
     No precise positions have yet been received, but A. Hale has
provided the following approximate data, obtained with a 0.41-m
reflector at Las Cruces, NM, adding that the coma, of diameter 1'.5,
was quite condensed, and there was a tail at least 3' long in p.a. 295 deg.

     1988 UT           R.A. (1950) Decl.        m1
     Dec. 31.493      16 27.39     - 0 04.3     9.4
          31.543      16 27.14     - 0 06.9


(724) HAPAG
     Continuation to the ephemeris on IAUC 4676:

     1988/89      R.A. (1950) Decl.     Delta      r        V
     Dec. 25     3 23.49    + 2 35.5    1.053    1.876    16.0
     Jan.  4     3 26.19    + 2 56.2
          14     3 32.05    + 3 39.9    1.238    1.901    16.5
          24     3 40.74    + 4 39.4
     Feb.  3     3 51.84    + 5 48.5    1.456    1.934    17.0
          13     4 04.99    + 7 02.0
          23     4 19.85    + 8 15.5    1.694    1.973    17.4


1989 January 3                 (4697)              Brian G. Marsden

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