Circular No. 5668

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@CFA or GREEN@CFA (.SPAN, .BITNET or .HARVARD.EDU)

COMET OHSHITA (1992a_{1}) H. Kosai, National Astronomical Observatory, Tokyo, reports the vi-

sual discovery of a comet by Nobuo Ohshita. The following observations have been reported:

1992 UT  α_{2000}  δ_{2000}  m_{1} Observer
Nov. 24.8458 13^{h}05.^{m}3  −5^{o}46′  11  Ohshita
28.84063 13 10 58.^{s}9 −0 56 50′′ 11  _{”}
29.82986 13 12 32.0 +0 18 44  11  _{”}
30.8104 13 14 10  +1 36  _{”}
Dec. 3.803  13 19 20  +5 43  11  Kushida
3.83194 13 19 26.66 +5 45 40.3 11.4 Seki
3.834 13 19 25 +5 47 11 Kushida
3.85313 13 19 29.13 +5 47 30.7  Seki
3.85885 13 19 29.60 +5 48 00.0  _{”}

N. Ohshita (Furukawa-machi, Gifu). 25×150 binoculars on Nov. 24. T-Max

film on Nov. 28-30 (with telephoto lenses), measured by G. Sasaki. Y. Kushida (Yatsugatake South Base Observatory). 0.10-m f/4 lens. T. Seki (Geisei). 0.60-m f/3.5 reflector. Visual m_{1} estimate.

Very preliminary parabolic orbital elements from 5 observations, Nov. 28-Dec. 3:

T = 1992 Nov. 1.63 TT  ω = 310.^{o}03
Ω = 138.42 }2000.0
q = 0.6639 AU  i = 114.72
1992TT α_{2000}  δ_{2000}  Δ  r  ϵ  β  m_{1}
Dec. 4 13^{h}19.^{m}75 + 6^{o}00.^{′}2 0.972 0.936 57.^{o}1 62.^{o}2 11.7
6 13 23.65 + 8 57.9 0.945 0.963 59.8 62.1 11.7
8 13 27.84 +12 05.0 0.921 0.991 62.6 61.9 11.8
10 13 32.36 +15 21.7 0.898 1.020 65.4 61.4 11.9
12 13 37.23 +18 47.8 0.878 1.048 68.2 60.7 11.9
14 13 42.48 +22 22.7 0.861 1.077 71.1 59.8 12.0
16 13 48.16 +26 05.6 0.847 1.106 73.9 58.7 12.1
18 13 54.32 +29 55.3 0.836 1.136 76.8 57.5 12.2
20 14 01.02 +33 50.0 0.828 1.165 79.5 56.1 12.3
22 14 08.33 +37 47.6 0.824 1.195 82.2 54.7 12.4
24 14 16.36 +41 45.9 0.825 1.225 84.8 53.1 12.5

1992 December 4 Daniel W. E. Green