Central Bureau for Astronomical Telegrams
IAUC 5158: 1991b
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Read IAUC 5159
Circular No. 5158
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 ARAI (1991b)
The following precise positions have been reported:
1991 UT R.A. (1950) Decl. m1 Observer
Jan. 7.53333 8 50 02.8 +16 17 57 10 Kushida
7.54809 8 50 01.0 +16 20 04 "
7.75989 8 49 28.51 +16 48 08.0 9.5 Seki
8.51811 8 47 34.42 +18 29 05.2 Kojima
8.52454 8 47 33.40 +18 29 58.0 10 "
8.53692 8 47 31.42 +18 31 36.5 "
Y. Kushida and R. Kushida (Yatsugatake South Base Observatory).
0.20-m f/4.8 reflector. Measurer O. Muramatsu. Communicated
by H. Kosai.
T. Seki (Geisei). Communicated by Kosai and S. Nakano.
T. Kojima (Chiyoda). 0.25-m f/3.4 Wright-Schmidt camera.
Preliminary parabolic orbital elements by S. Nakano,
Sumoto, Japan, from 9 observations Jan. 6-8:
T = 1990 Dec. 12.084 ET Peri. = 338.639
Node = 114.852 1950.0
q = 1.44128 AU Incl. = 71.354
1991 ET R.A. (1950) Decl. Delta r m1
Jan. 4 8 58.03 + 8 41.1 0.552 1.478 10.4
6 8 53.68 +12 56.5
8 8 48.88 +17 20.0 0.537 1.492 10.4
10 8 43.62 +21 47.4
12 8 37.88 +26 13.9 0.538 1.507 10.4
14 8 31.68 +30 34.6
16 8 25.02 +34 45.4 0.555 1.525 10.6
18 8 17.92 +38 42.4
20 8 10.42 +42 23.0 0.587 1.544 10.7
22 8 02.56 +45 45.6
24 7 54.40 +48 49.5 0.633 1.565 11.0
26 7 46.00 +51 34.7
28 7 37.44 +54 01.9 0.688 1.588 11.2
Total visual magnitude estimate by D. H. Levy, Tucson, AZ
(0.41-m reflector): Jan. 8.41 UT, 10.8 (comet diffuse, 8' coma).
1991 January 8 (5158) Daniel W. E. Green
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