Circular No. 5679

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})

The following precise positions have been reported:

1992 UT α_{2000} δ_{2000} m_{1} Observer
Nov. 21.82049 13^{h}01^{m}47.^{s}7 − 9^{o}00′21′′ 12  Horiguchi
21.82616 13 01 48.6 − 9 00 00  _{”}
Dec. 5.80748 13 23 16.35 + 8 40 34.5  Kobayashi
5.81903 13 23 17.79 + 8 41 36.0  _{”}
8.84917 13 29 45.24 +13 28 17.3 13.2 Ito
8.85598 13 29 46.16 +13 28 55.1  _{”}
11.78808 13 36 46.23 +18 27 34.9  Ikari
19.51416 13 59 39.33 +33 00 16.3  Rogers
19.52832 13 59 42.19 +33 01 56.2  _{”}
21.38025 14 06 24.64 +36 43 11.3  McCrosky
21.45208 14 06 40.76 +36 51 50.4  _{”}

S. Horiguchi (Chuchibu). 0.10-m f/4 refractor. Measured by T. Kojima.

Prediscovery observations. T. Kobayashi (Oizumi). 0.16-m f/6.3 reflector + CCD. K. Ito (Sengamine). 0.20-m f/4.8 reflector + CCD. Y. Ikari (Kiryuu Observatory, Ohtsu). 0.26-m f/2.9 reflector. J. E. Rogers (Camarillo). 0.25-m Schmidt-Cassegrain + CCD. R. E. McCrosky and C.-Y. Shao (Oak Ridge). 1.5-m reflector + CCD.

Elliptical orbital elements by B. G. Marsden from 15 observations Nov. 21-Dec. 21:

T = 1992 Nov. 1.562 TT  ω = 309.^{o}979
e = 0.99054  Ω = 138.352 }2000.0
q = 0.66357 AU  i = 115.114
1992/93 α_{2000}  δ_{2000}  Δ  r  ϵ  β  m_{1}
Dec. 20 14^{h}01.^{m}35 +33^{o}58.^{′}0 0.822 1.162 79.^{o}6 56.^{o}4 12.2
22 14 08.78 +37 57.6 0.818 1.192 82.2 54.9 12.3
24 14 16.95 +41 57.8 0.818 1.221 84.8 53.3 12.4
26 14 25.98 +45 56.1 0.822 1.251 87.2 51.8 12.5
28 14 36.03 +49 49.5 0.830 1.280 89.4 50.2 12.7
30 14 47.28 +53 35.5 0.842 1.310 91.4 48.6 12.8
Jan. 1 14 59.97 +57 11.6 0.858 1.340 93.1 47.1 12.9

1992 December 21 Daniel W. E. Green