Central Bureau for Astronomical Telegrams
IAUC 4738: 1989a; 1989B
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Circular No. 4738
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)
Improved parabolic orbital elements from MPC 14154:
T = 1988 Oct. 31.923 ET Peri. = 351.634
Node = 156.419 1950.0
q = 1.89616 AU Incl. = 52.440
1989 ET R.A. (1950) Decl. Delta r m1
Feb. 3 14 42.85 +21 40.2 1.813 2.222 11.8
13 14 56.46 +26 08.7
23 15 07.32 +30 40.5 1.807 2.355 12.0
Mar. 5 15 15.06 +35 04.5
15 15 19.38 +39 09.1 1.877 2.501 12.3
25 15 20.24 +42 43.6
Apr. 4 15 17.84 +45 39.9 2.020 2.656 12.8
14 15 12.71 +47 52.2
24 15 05.78 +49 18.4 2.221 2.819 13.2
May 4 14 58.14 +49 59.8
14 14 50.89 +49 59.9 2.469 2.987 13.7
24 14 44.93 +49 24.9
June 3 14 40.80 +48 21.4 2.749 3.159 14.2
13 14 38.77 +46 56.0
23 14 38.82 +45 14.8 3.054 3.333 14.7
Total visual magnitude estimates (cf. IAUC 4711): Jan. 13.52
UT, 10.3 (R. Keen, Mt. Thorodin, CO, 0.32-m reflector); 14.84, 10.9
(J. Kobayashi, Kumamoto, Japan, 0.31-m reflector); 16.49, 11.0 (C. S.
Morris, near Mt. Wilson, CA, 0.26-m reflector); 19.49, 11.3 (G. Kronk,
Troy, IL, 0.33-m reflector); Feb. 3.39, 11.5 (A. Hale, Las Cruces, NM,
0.41-m reflector).
SUPERNOVA 1989B IN NGC 3627
Further magnitude estimates, visual unless otherwise noted (cf.
IAUC 4735): Jan. 29.95 UT, 13: (F. Tulipani and S. Cristini, Bologna,
Italy; pre-discovery photograph); 30.35, 12: (C. Gonzales, Brawley,
CA; independent discovery, report delayed); Feb. 9.93, 12.1 (G. M.
Hurst, Basingstoke, England); 10.95, 12.2 (J. D. Shanklin, Cambridge,
England); 11.91, 12.0 (P. Schmeer, Bischmisheim, West Germany);
12.95, 12.0 (Schmeer).
1989 February 13 (4738) Daniel W. E. Green
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