Circular No. 6769

Central Bureau for Astronomical Telegrams INTERNATIONAL ASTRONOMICAL UNION

Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.

IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions) BMARSDEN@CFA.HARVARD.EDU or DGREEN@CFA.HARVARD.EDU (science)

     URL http://cfa-www.harvard.edu/iau/cbat.html

Phone 617-495-7244/7440/7444 (for emergency use only)

COMET 1997 V1

Selected precise CCD positions (Japanese data via S. Nakano):

1997 UT α_{2000} δ_{2000} m_{1} Observer
Nov. 3.98091 0^{h}14^{m}02.^{s}88 +12^{o}24′15′′.6 16.3 Pravec
3.99981 0 14 02.65 +12 24 08.7  _{”}
4.04208 0 14 02.08 +12 23 54.1  Kidger
4.07030 0 14 01.76 +12 23 44.0  _{”}
4.42198 0 13 58.04 +12 21 32.7  Sugie
4.42545 0 13 58.00 +12 21 31.7  _{”}
4.50839 0 13 56.95 +12 21 01.0 15.8 Asami
4.52171 0 13 56.80 +12 20 55.9  _{”}
4.57911 0 13 56.18 +12 20 33.8 16.9 Zhou
4.58692 0 13 56.05 +12 20 31.3 16.9  _{”}
4.69663 0 13 55.04 +12 19 50.6 16.2 Moravec
4.91946 0 13 52.45 +12 18 28.4  _{”}
4.95806 0 13 52.03 +12 18 14.0  Pravec
4.99853 0 13 51.56 +12 17 58.9  _{”}
5.18395 0 13 49.74 +12 16 51.7 16.3 Offutt
5.19736 0 13 49.58 +12 16 46.8 16.4  _{”}
5.43271 0 13 47.30 +12 15 20.7 16.3 Sugie
5.43965 0 13 47.21 +12 15 18.3  _{”}
5.44459 0 13 47.09 +12 15 15.1  Kojima
5.47552 0 13 46.82 +12 15 05.6 16.6 Nakamura
5.48802 0 13 46.69 +12 15 00.9  _{”}
5.50706 0 13 46.31 +12 14 52.9 16.5 Kojima

P. Pravec and L. Šarounová (Ondřejov). 0.65-m f/3.6 reflector. On Nov.

3.98, nearly-stellar appearance, faint 15′′ tail in p.a. 260^{o}, m_{2} = 17.1. M. Kidger (Teide). Measurer R. Casas. 0.8-m f/11 reflector. A. Sugie (Dynic Astronomical Obs.). 0.60-m reflector. Short westward tail. A. Asami (Hadano). 0.28-m f/5.0 reflector. X. Zhou, J. Zhu, and X. Y. Li (Xinglong). 0.60-m Schmidt telescope. Z. Moravec and M. Tichý (Kleť). 0.57-m f/5.2 reflector. Measurer Tichý. W. Offutt (Cloudcroft). 0.60-m f/7 Ritchey-Chrétien reflector. Broad, not-

well-defined tail extending 20′′ in p.a. 245^{o}. T. Kojima (Chiyoda). 0.25-m f/6.0 reflector. A. Nakamura (Kuma). 0.60-m f/6.0 Ritchey-Chrétien reflector.

1997 November 5  \begin{matrix}c \\ ◯ \end{matrix} Copyright 1997 CBAT  Daniel W. E. Green