[IAUC] IAUC 8878: P/2007 T2; V458 Vul [25139-2008/05-R1]
IAUC mailing list
quai en cfa.harvard.edu
Jue Oct 11 14:30:23 ART 2007
Circular No. 8878
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS en CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT en CFA.HARVARD.EDU (science)
URL http://www.cfa.harvard.edu/iau/cbat.html ISSN 0081-0304
Phone 617-495-7440/7244/7444 (for emergency use only)
COMET P/2007 T2 (KOWALSKI)
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
V458 VULPECULAE
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,
Belgium).
(C) Copyright 2007 CBAT
2007 October 11 (8878) Daniel W. E. Green
Más información sobre la lista de distribución Iauc