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IAUC 8794: C/2007 A2; C/2006 P1; 2007D, 2007E, 2007F

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                                                  Circular No. 8794
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 C/2007 A2 (CHRISTENSEN)
     E. J. Christensen reports the discovery of a comet on CCD
images taken through light cirrus clouds with the 1.5-m reflector
in the course of the Mt. Lemmon Survey, noting a moderately
condensed 5" coma and an 8" tail toward p.a. 300 deg (description
from four 30-s co-added images).

     2007 UT             R.A. (2000) Decl.       Mag.
     Jan. 10.41205    9 01 08.39   +13 28 58.1   19.4

The reported astrometry, the following very preliminary parabolic
orbital elements, and an ephemeris appear on MPEC 2007-A46.

     T = 2007 July  8.036 TT          Peri. = 226.013
                                      Node  = 304.395   2000.0
     q = 3.06166 AU                   Incl. =  40.974


COMET C/2006 P1 (McNAUGHT)
     Visual total-magnitude and tail-length estimates made in
daylight:  Jan. 12.84 UT, -3.9, short (D. W. E. Green, Cambridge,
MA, U.S.A., 20x80 binoc.); 12.91, -4.5, 0.1 deg (J. Bortle,
Stormville, NY, 10x50 binoc.); 12.91, -4.1, about 0.5 deg (C. S.
Morris, Fillmore, CA, U.S.A., 20x80 binoc.).


SUPERNOVAE 2007D, 2007E, 2007F
     Three apparent supernovae have been discovered on unfiltered
CCD frames:  2007E by N. Joubert and W. Li (LOSS/KAIT; cf. IAUC
8792); and the others by T. Puckett (2007D with T. Orff, and 2007F
with R. Gagliano; cf. IAUC 8792; 0.35-m reflector at Ellijay, GA).

SN      2007 UT      R.A.  (2000.0)  Decl.    Mag.     Offset
2007D   Jan.  9.02   3 18 38.71  +37 36 26.4  18.2  4".9 E, 2".8 S
2007E   Jan. 10.17   2 26 34.41  -15 50 36.5  15.9  15".7 E, 14".2 N
2007F   Jan. 11.40  13 03 15.08  +50 37 07.7  17.3  10".1 W, 7".4 S

Additional magnitudes for 2007D in UGC 2653:  2005 Dec. 6, [19.4;
2007 Jan. 11.07, 17.9.  Additional KAIT magnitudes for 2007E in NGC
921:  2006 Dec. 7.16, [18.2; 2007 Jan. 12.13, 16.0.  Additional
magnitudes for 2007F in UGC 8162:  2005 Dec. 16, [19.8 (Puckett);
2007 Jan. 12.27, 16.8 (A. Sehgal, Osoyoos, BC, Canada, 0.50-m
reflector).

                      (C) Copyright 2007 CBAT
2007 January 12                (8794)            Daniel W. E. Green

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