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IAUC 8878: P/2007 T2; V458 Vul

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                                                  Circular No. 8878
Central Bureau for Astronomical Telegrams
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
URL http://www.cfa.harvard.edu/iau/cbat.html  ISSN 0081-0304
Phone 617-495-7440/7244/7444 (for emergency use only)

     R. A. Kowalski reports his discovery of a comet on Catalina
Sky Survey images taken with the 0.68-m Schmidt telescope
(discovery observation tabulated below), the twilight images
showing a coma 15" across.  Follow-up 30-s exposures by E. Beshore
with the Mt. Lemmon 1.5-m reflector on Oct. 10.5 UT show a bright,
elongated nuclear condensation and a tail approximately 20" long in
p.a. approximately 300 deg.  After posting on the Minor Planet
Center's 'NEOCP' webpage, G. Sostero and E. Guido (Remanzacco,
Italy, 0.45-m f/4.4 reflector) write that 70 co-added 30-s images
from Oct. 10.13-10.16 show a concentrated coma with a diameter of
nearly 18" of total mag about 16.3, elongated toward the northwest,
with a narrow tail extending nearly 15" toward p.a. 300 deg.  L.
Buzzi (Varese, Italy, 0.60-m f/4.6 reflector) reports that, on his
images from Oct. 11.2, the object is elongated 10" in p.a. 310 deg.
D. T. Durig (Sewanee, TN, U.S.A., 0.30-m f/3 Schmidt-Cassegrain
reflector) notes that twenty stacked 2-min images taken on Oct. 11.4
show a 15"-17" coma that is asymmetrical in p.a. 310 deg.  J. E.
McGaha (Tucson, AZ, U.S.A., 0.62-m f/5.1 reflector) adds that his
120-s images from Oct. 11.48 show a 6" coma that is elongated
toward a short 8" tail in p.a. 305 deg.

     2007 UT             R.A. (2000) Decl.       Mag.
     Oct.  9.50984   10 05 54.70   +22 37 06.5   16.9

The available astrometry, the following preliminary elliptical
orbital elements, and an ephemeris appear on MPEC 2007-T76.

     T = 2007 Sept.18.999 TT          Peri. = 358.436
     e = 0.78882                      Node  =   4.161   2000.0
     q = 0.69221 AU                   Incl. =   9.979
       a =  3.27775 AU     n = 0.166089     P =   5.9 years

     Visual magnitude estimates (cf. IAUC 8863), some forwarded by
E. Broens, Mol, Belgium, on behalf of the Werkgroep Veranderlijke
Sterren, Vereniging Voor Sterrenkunde:  Aug. 26.821 UT, 10.7 (K.
Hornoch, Vohancice, Czech Republic); 29.843, 11.0 (P. Cloesen,
Beringen, Belgium); Sept. 4.874, 11.2 (F. Van Loo, Genk, Belgium);
12.912, 11.3 (A. Diepvens, Balen, Belgium); 16.835, 11.6 (H.
Hautecler, Boutersem, Belgium); 20.784, 12.0 (M. Lehky, Hradec
Kralove, Czech Republic); 24.847, 11.8 (E. Muyllaert, Oostende,

                      (C) Copyright 2007 CBAT
2007 October 11                (8878)            Daniel W. E. Green

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