[IAUC] IAUC 8791: P/2007 A1 [25139-2007/05-R1]
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Circular No. 8791
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
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Phone 617-495-7440/7244/7444 (for emergency use only)
COMET P/2007 A1 (LOVAS)
Comet P/1986 W1 (= 1986 XIII = 1986p; cf. IAUC 4276) has been
accidentally rediscovered on Catalina Sky Survey images taken with
the 0.68-m Schmidt telescope on Jan. 9 by R. A. Kowalski, the comet
appearing diffuse with a slightly condensed core approximately 1'
in diameter, and a more intense core approximately 20" in diameter.
Confirming CCD frames in good seeing by E. J. Christensen with the
Mt. Lemmon 1.5-m reflector on the same night show a moderately
condensed 10" coma with a diffuse tail extending 30" toward p.a.
about 75 deg, while his images on Jan. 10 display a moderately
condensed 10" inner coma surrounded by a faint 30" outer coma (the
latter being elongated toward p.a. 60 deg). Following posting on
the Minor Planet Center's 'NEOCP' website, additional astrometry
below was reported by G. Hug, B. Twarog, and D. Tibbets (Eskridge,
KS, 0.7-m reflector; object diffuse) and by J. E. McGaha (Tucson,
AZ, 0.30-m reflector). The indicated correction to the prediction
by S. Nakano in the 2006 Comet Handbook (and NK 946) is Delta(T) =
+18.6 days.
2007 UT R.A. (2000) Decl. Mag. Observer
Jan. 9.07080 22 53 11.96 - 5 45 10.9 16.8 Kowalski
9.07407 22 53 12.66 - 5 45 07.5 16.4 "
9.07734 22 53 13.28 - 5 45 04.2 16.8 "
9.08061 22 53 13.78 - 5 45 01.2 18.3 "
9.09382 22 53 16.28 - 5 44 45.3 17.0 Christensen
9.09470 22 53 16.42 - 5 44 44.3 "
9.09558 22 53 16.60 - 5 44 43.5 "
9.09647 22 53 16.74 - 5 44 42.0 "
10.07002 22 56 24.14 - 5 25 43.1 17.3 "
10.07782 22 56 25.67 - 5 25 34.3 "
10.08178 22 56 26.46 - 5 25 29.2 "
10.10260 22 56 30.40 - 5 25 05.4 18.6 Hug
10.10699 22 56 31.20 - 5 25 00.8 18.7 "
10.11151 22 56 32.06 - 5 24 56.5 19.1 "
10.12584 22 56 34.79 - 5 24 37.4 18.8 McGaha
10.13161 22 56 35.92 - 5 24 30.3 19.1 "
10.13738 22 56 37.10 - 5 24 23.9 18.8 "
(C) Copyright 2006 CBAT
2007 January 10 (8791) Daniel W. E. Green
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