[IAUC] CBET 3368: 20130105 : COMET C/2013 A1 (SIDING SPRING)
quai en eps.harvard.edu
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Vie Ene 4 18:28:46 ART 2013
Electronic Telegram No. 3368
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 A1 (SIDING SPRING)
R. H. McNaught reported the discovery of an apparently asteroidal object
on CCD images obtained with the 0.5-m Uppsala Schmidt telescope on Jan. 3
(discovery observations tabulated below); after posting at the Minor Planet
Center's NEOCP webpage, McNaught reported that five stacked follow-up 40-s
images taken on Jan. 4.5 UT in good seeing showed a slightly diffuse object
with a strongly condensed 10" coma of total mag 18.3-18.4 -- noting that, on
the discovery night, the seeing was poor and there was a collimation problem
that was fixed in the intervening 24 hours. H. Sato (Tokyo, Japan; remotely
using a 0.51-m f/6.8 astrograph at the iTelescope Observatory, Siding Spring;
Jan. 4.4-4.6) reports a 10" round coma with a hint of tail northwards in his
stacked images.
2013 UT R.A. (2000) Decl. Mag. Observer
Jan. 3.53978 5 12 10.63 -21 29 57.1 18.6 McNaught
3.55185 5 12 10.10 -21 29 57.1 18.6 "
3.56300 5 12 09.58 -21 29 57.1 18.4 "
The available astrometry (including prediscovery observations on 2012
Dec. 8 from the Catalina Sky Survey), the following nearly-parabolic
orbital elements by G. V. Williams, and an ephemeris appear on MPEC
2013-A14.
T = 2014 Oct. 25.08285 TT Peri. = 2.54133
e = 0.9995246 Node = 300.85326 2000.0
q = 1.3921432 AU Incl. = 128.96230
NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
superseded by text appearing later in the printed IAU Circulars.
(C) Copyright 2013 CBAT
2013 January 5 (CBET 3368) Daniel W. E. Green
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