[IAUC] CBET 3255: 20121016 : COMET P/2012 T3 (PANSTARRS)
quai en eps.harvard.edu
quai en eps.harvard.edu
Mar Oct 16 08:14:50 ART 2012
Electronic Telegram No. 3255
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
CBAT Director: Daniel W. E. Green; Hoffman Lab 209; Harvard University;
20 Oxford St.; Cambridge, MA 02138; U.S.A.
e-mail: cbatiau en eps.harvard.edu (alternate cbat en iau.org)
URL http://www.cbat.eps.harvard.edu/index.html
Prepared using the Tamkin Foundation Computer Network
COMET P/2012 T3 (PANSTARRS)
Richard Wainscoat, Larry Denneau, and Henry Hsieh report the discovery
of a comet in four w-band exposures taken with the 1.8-m Pan-STARRS 1
telescope at Haleakala (discovery observations tabulated below); the object is
faint but has a diffuse, non-stellar appearance. Hsieh writes that follow-up
images obtained by Heather Kaluna with the University of Hawaii 2.2-m
telescope at Mauna Kea on Oct. 12 UT, and by Scott Sheppard and Chad
Trujillo with the 6.5-m Magellan Baade telescope at Las Campanas on Oct. 15,
confirm that the object is clearly cometary; measurements by Hsieh show that
the object's point-spread function has a FWHM of 2".4 compared to a typical
FWHM of 2".2 for nearby field stars in the 2.2-m telescope data, while the
object's PSF has a FWHM of 1".6 compared to a typical FWHM of 1".2 for
nearby field stars in the Magellan data.
2012 UT R.A. (2000) Decl. Mag.
Oct. 10.35159 23 54 35.68 -15 02 31.3 21.3
10.36553 23 54 35.32 -15 02 32.0 21.4
10.37946 23 54 34.94 -15 02 32.8 21.5
10.39339 23 54 34.61 -15 02 33.3 21.4
The available astrometry, the following preliminary elliptical orbital
elements by G. V. Williams, and an ephemeris appear on MPEC 2012-U4.
T = 2012 Apr. 30.3931 TT Peri. = 198.4921
e = 0.596998 Node = 113.8604 2000.0
q = 2.407888 AU Incl. = 9.4895
a = 5.974880 AU n = 0.0674855 P = 14.6 years
NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
superseded by text appearing later in the printed IAU Circulars.
(C) Copyright 2012 CBAT
2012 October 16 (CBET 3255) Daniel W. E. Green
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