[IAUC] CBET 4032: 20141205 : COMET P/2014 W12 (GIBBS)
quai en eps.harvard.edu
quai en eps.harvard.edu
Vie Dic 5 02:11:34 ART 2014
Electronic Telegram No. 4032
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/2014 W12 (GIBBS)
A. R. Gibbs reports his discovery of a comet on CCD images taken with
the Mount Lemmon 1.5-m reflector on Nov. 30.1 UT (discovery observations
tabulated below). Four co-added 30-s exposures taken in fair seeing at
35 deg altitude on Nov. 30.07-30.09 show a slightly diffuse and circular coma
of diameter 4" with a short, broad tail 7" long in p.a. 60-90 deg; four
additional 60-s exposures taken around Nov. 30.13 show a 16" tail that is
initially broad but extending further in p.a. 80-100 deg, and a 6" coma.
2014 UT R.A. (2000) Decl. Mag. Observer
Nov. 30.06800 20 52 05.70 -11 52 08.7 18.3 Gibbs
30.07408 20 52 06.71 -11 52 03.6 18.3 "
30.08017 20 52 07.61 -11 51 59.0 18.3 "
30.08627 20 52 08.51 -11 51 54.1 18.3 "
30.12984 20 52 15.37 -11 51 20.7 18.2 "
30.13069 20 52 15.52 -11 51 20.4 18.2 "
30.13153 20 52 15.66 -11 51 19.2 18.2 "
30.13238 20 52 15.77 -11 51 18.7 18.2 "
Follow-up images taken on Dec. 1.06 UT by R. E. Hill with the Mt. Lemmon 1.5-m
reflector show a bright nuclear condensation with a tight coma about 12-15"
across (mag 17.0-17.1), and a thin tail 15" long in p.a. 190 deg in four
co-added 30-s exposures. After the object was posted on the Minor Planet
Center's PCCP webpage, H. Sato, Tokyo, Japan, obtained twelve stacked 60-s
exposures with an iTelescope 0.51-m f/6.8 astrograph (+ luminance filter) near
Mayhill, NM, USA, on Dec. 1.1 that show the comet to be strongly condensed
with a round coma 15" in diameter (w-band magnitude 17.1 as measured within a
circular aperture of radius 8".2) and a very faint fan-like tail 30" long
toward the southeastward.
The available astrometry, the following preliminary elliptical orbital
elements by G. V. Williams, and an ephemeris appear on MPEC 2014-X33.
T = 2014 Nov. 9.1194 TT Peri. = 33.5100
e = 0.533840 Node = 299.2017 2000.0
q = 1.681843 AU Incl. = 8.5443
a = 3.607868 AU n = 0.1438229 P = 6.85 years
NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
superseded by text appearing later in the printed IAU Circulars.
(C) Copyright 2014 CBAT
2014 December 5 (CBET 4032) Daniel W. E. Green
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