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IAUC 8791: P/2007 A1

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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.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT@CFA.HARVARD.EDU (science)
URL http://cfa-www.harvard.edu/iau/cbat.html  ISSN 0081-0304
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 2007 CBAT
2007 January 10                (8791)            Daniel W. E. Green

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