[IAUC] CBET 3736: 20131206 : COMET C/2013 X1 (PANSTARRS)
quai en eps.harvard.edu
quai en eps.harvard.edu
Vie Dic 6 08:32:17 ART 2013
Electronic Telegram No. 3736
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 C/2013 X1 (PANSTARRS)
Bryce Bolin, Larry Denneau, Peter Veres, and Richard Wainscoat report
their discovery of a comet with a diffuse, non-stellar appearance in four
45s w-band exposures from the Pan-STARRS1 telescope on Haleakala (discovery
observations tabulated below). A stacked image showed no sign of a tail.
2013 UT R.A. (2000) Decl. Mag.
Dec. 4.43435 7 13 41.74 +31 30 34.0 20.2
4.44831 7 13 41.27 +31 30 35.6 20.3
4.46232 7 13 40.79 +31 30 37.5 20.2
4.47630 7 13 40.31 +31 30 39.1 20.2
Marco Micheli writes that follow-up images were obtained by R. J. Wainscoat on
Dec. 5.5 UT with the 3.6-m Canada-France-Hawaii Telescope (queue observer David
Woodworth); an analysis of these images by Wainscoat and Micheli confirms the
cometary activity of this object, with three 180-s r-band exposures showing a
non-stellar point-spread function (FWHM about 1".3 in 0".9 seeing conditions)
and a short tail about 2" long in p.a. 30 deg. After the object was posted on
the Minor Planet Center's PCCP webpage, H. Sato (Tokyo, Japan; remotely with
an iTelescope 0.51-m f/6.8 astrograph at Siding Spring; Dec. 5.7) found a
moderately condensed coma 6" in diameter.
The available astrometry (including pre-discovery observations from Nov.
29 at Mount Lemmon giving magnitude 19.9-20.0), the following preliminary
parabolic orbital elements by G. V. Williams, and an ephemeris appear on MPEC
2013-X28.
T = 2016 Apr. 18.8438 TT Peri. = 164.7787
Node = 130.9630 2000.0
q = 1.298993 AU Incl. = 163.2416
NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
superseded by text appearing later in the printed IAU Circulars.
(C) Copyright 2013 CBAT
2013 December 6 (CBET 3736) Daniel W. E. Green
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