Central Bureau for Astronomical Telegrams
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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