Central Bureau for Astronomical Telegrams
IAUC 5489: 1992d; CCO 1992
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Read IAUC 5490
Circular No. 5489
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 TANAKA-MACHHOLZ (1992d)
Further precise positions have been reported as follows:
1992 UT R.A. (2000) Decl. Observer
Apr. 1.79390 22 12 14.50 +19 47 28.2 Seki
2.52431 22 13 57.63 +20 27 04.4 Tatum
2.80087 22 14 37.08 +20 42 09.0 Seki
2.80521 22 14 37.63 +20 42 23.4 "
2.81311 22 14 38.68 +20 42 48.4 Kobayashi
2.81641 22 14 39.27 +20 42 59.6 "
T. Seki (Geisei, Japan). 0.6-m reflector. Communicated by S. Nakano.
J. B. Tatum (Climenhaga Observatory). 0.25-m refractor.
T. Kobayashi (Oizumi, Japan). 0.25-m f/3.4 Wright-Schmidt.
Parabolic orbital elements from 8 observations Mar. 24-Apr. 2:
T = 1992 Apr. 22.454 TT Peri. = 65.246
Node = 300.482 2000.0
q = 1.26288 AU Incl. = 79.246
1992 TT R. A. (2000) Decl. Delta r Elong. Phase m1
Mar. 29 22 03.65 +16 27.0 1.940 1.317 38.6 28.3 9.1
Apr. 3 22 15.09 +20 53.0 1.881 1.297 40.6 30.1 9.0
8 22 27.63 +25 33.5 1.829 1.282 42.4 31.8 8.9
13 22 41.57 +30 25.9 1.785 1.271 44.0 33.2 8.8
18 22 57.30 +35 26.6 1.752 1.265 45.2 34.3 8.7
23 23 15.31 +40 30.3 1.729 1.263 46.2 35.1 8.7
28 23 36.23 +45 30.0 1.717 1.266 46.9 35.5 8.7
May 3 0 00.80 +50 17.2 1.718 1.273 47.3 35.6 8.7
8 0 29.86 +54 42.2 1.731 1.285 47.4 35.3 8.8
Total visual magnitudes: Apr. 2.80 UT, 8.7 (Seki, 0.2-m refractor);
2.81, 9 (H. Mori, Mugegawa, Gifu, Japan, 20 x 120 binoculars; independent
discovery); 3.52, 8.5 (D. Machholz, Colfax, CA, 20 x 80 binoculars).
CATALOGUE OF COMETARY ORBITS 1992
Corrigendum. Contrary to the remark on IAUC 5483, the correct value
of A2 for P/Harrington (1953-1980) should be +0.1070. The value of this
quantity is also given incorrectly (but differently) in the 1989 edition.
1992 April 3 (5489) Brian G. Marsden
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