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IAUC 4723: 1988r

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                                                  Circular No. 4723
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 (1988r)
     Only four precise positions have been reported since Jan. 5:

     1989 UT             R.A. (1950) Decl.       Observer
     Jan. 11.24921   15 18 14.06   -14 07 48.7   Shanklin
          13.25164   14 59 34.94   -18 00 27.7     "
          16.86493   14 18 04.58   -25 46 10.7   Kojima
          16.86927   14 18 01.31   -25 46 50.0     "

J. D. Shanklin (University of Cambridge Observatories).
T. Kojima (YGCO Chiyoda Observatory).

     Improved parabolic elements from 31 observations Jan. 1-16:

     T = 1988 Dec. 11.653 ET          Peri. =  88.125
                                      Node  = 314.824   1950.0
     q = 0.42780 AU                   Incl. =  71.010

     1989 ET      R.A. (1950) Decl.     Delta      r       m1
     Jan. 26    11 42.82    -41 52.9    0.348    1.125    10.7
          28    11 05.34    -43 09.0
          30    10 30.47    -43 33.7    0.387    1.197    11.2
     Feb.  1     9 59.41    -43 18.4
           3     9 32.57    -42 35.5    0.443    1.268    11.8
           5     9 09.83    -41 35.5
           7     8 50.76    -40 26.3    0.510    1.338    12.3
           9     8 34.82    -39 13.2
          11     8 21.52    -37 59.7    0.586    1.407    12.8
          13     8 10.39    -36 47.7
          15     8 01.07    -35 38.5    0.668    1.475    13.3
          17     7 53.23    -34 32.5
          19     7 46.63    -33 30.1    0.754    1.542    13.8
          21     7 41.06    -32 31.2
          23     7 36.37    -31 35.7    0.844    1.608    14.2

     Total visual magnitude estimates: Jan. 10.53 UT, 9.9 (A. Hale, Las
Cruces, NM, 0.41-m reflector); 11.26, 11.2 (J. D. Shanklin, Cambridge,
England, 0.3-m refractor); 13.49, 9.8 (G. W. Kronk, Troy, IL, 0.33-m
reflector); 14.86, 9.8 (J. Kobayashi, Kumamoto, Japan, 0.31-m
reflector); 15.54, 10.1 (Hale); 16.52, 9.7 (C. S. Morris, near Mt.
Wilson, CA, 0.26-m reflector); 19.47, 10.3 (Kronk).


1989 January 26                 (4723)             Brian G. Marsden

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