Circular No. 6995

Central Bureau for Astronomical Telegrams INTERNATIONAL ASTRONOMICAL UNION

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COMET C/1998 Q1 (LINEAR)

M. Bezpalko reports a LINEAR comet discovery. CCD astrometry:

1998 UT α_{2000} δ_{2000} m_{1} Observer
Aug. 24.29673 22^{h}09^{m}01.^{s}31 +0^{o}18′34′′.4 17.7 Blythe
24.31316 22 09 01.60 +0 17 48.9  _{”}
24.32962 22 09 01.88 +0 17 03.8  _{”}
24.34604 22 09 02.20 +0 16 18.3 18.0  _{”}
25.11678 22 09 20.19 −0 19 01.8 16.3 Griffin
25.12859 22 09 20.43 −0 19 34.0 16.2  _{”}
25.13219 22 09 20.61 −0 19 46.8  Hug
25.13554 22 09 20.60 −0 19 53.6 16.5 Griffin
25.14039 22 09 20.77 −0 20 08.0  _{”}
25.15330 22 09 20.99 −0 20 43.5  _{”}
25.32379 22 09 24.30 −0 28 29.4  Shelus
25.32828 22 09 24.38 −0 28 41.6  _{”}
25.33274 22 09 24.46 −0 28 54.0  _{”}
25.35352 22 09 25.05 −0 29 53.6  Balam
25.35571 22 09 25.09 −0 29 59.6  _{”}
25.35763 22 09 25.13 −0 30 04.9  _{”}
25.50117 22 09 28.85 −0 36 22.3 15.6 Zoltowski
25.51040 22 09 29.03 −0 36 47.7 15.5  _{”}
25.51654 22 09 29.16 −0 37 04.5 15.4  _{”}
25.52149 22 09 29.12 −0 37 18.4  Garradd
25.52257 22 09 29.12 −0 37 20.7  _{”}
25.52441 22 09 29.16 −0 37 26.9  _{”}
25.52645 22 09 29.22 −0 37 32.3  _{”}

M. Blythe, F. Shelly, and M. Bezpalko (Socorro). Measurers J. Stuart, H.

Viggh, and R. Sayer. 1.0-m f/2.15 reflector. G. Hug (Farpoint Observatory, Eskridge). 0.30-m reflector. P. J. Shelus (McDonald Observatory). 0.76-m reflector + prime-focus cor-

rector. Object diffuse with a possible slight tail extending to the west. I. P. Griffin (Cocoa). 0.3-m f/5 reflector. Circular coma ∼ 10′′. D. D. Balam (Victoria). 1.82-m Plaskett telescope. Well-condensed coma

of diameter 15′′. F. B. Zoltowski (Woomera). 0.30-m f/3.3 Schmidt-Cassegrain telescope.

Dense coma with a faint, diffuse tail ∼ 1′ long in p.a. 280^{o}. G. J. Garradd (Loomberah). 0.45-m f/5.4 reflector. Object diffuse with ∼

10′′ coma on 6-s exposures; m_{2} = 17.4-17.8.

1998 August 25  \begin{matrix}c \\ ◯ \end{matrix} Copyright 1998 CBAT  Daniel W. E. Green