[IAUC] CBET 3389: 20130122 : COMET P/2013 AL_76 (CATALINA)
quai en eps.harvard.edu
quai en eps.harvard.edu
Mar Ene 22 16:29:29 ART 2013
Electronic Telegram No. 3389
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/2013 AL_76 (CATALINA)
An apparently asteroidal object discovered on Catalina Sky Survey images
taken by J. A. Johnson (discovery observations tabulated below), and given
the minor-planet designation 2013 AL_76, has been found to show cometary
appearance by J. V. Scotti in images taken with the Spacewatch 1.8-m f/2.7
reflector at Kitt Peak on Jan. 20.4 UT. Scotti writes that thirty-five
co-added 44-s exposures show a coma diameter of 7" (red mag 19.5-19.6) and a
fan-shaped tail 0'.29 long spanning p.a. about 129-189 deg; the faint tail is
clearly visible in each pair of fifteen co-added images that he used to
measure for astrometry.
2013 UT R.A. (2000) Decl. Mag. Observer
Jan. 14.21289 7 51 50.83 +61 38 13.1 19.8 Johnson
14.22798 7 51 40.42 +61 38 44.1 19.5 "
14.23550 7 51 35.28 +61 38 59.0 19.2 "
14.43057 7 49 19.70 +61 45 24.8 19.4 "
14.43523 7 49 16.53 +61 45 33.0 19.6 "
14.43993 7 49 13.29 +61 45 42.0 19.4 "
14.44462 7 49 10.09 +61 45 51.5 19.6 "
The available astrometry, the following retrograde elliptical orbital
elements by G. V. Williams, and an ephemeris appear on MPEC 2013-B77.
Epoch = 2012 Dec. 19.0 TT
T = 2012 Dec. 13.4937 TT Peri. = 27.2718
e = 0.674416 Node = 145.9061 2000.0
q = 2.046879 AU Incl. = 144.8503
a = 6.286790 AU n = 0.0625260 P = 15.76 years
NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
superseded by text appearing later in the printed IAU Circulars.
(C) Copyright 2013 CBAT
2013 January 22 (CBET 3389) Daniel W. E. Green
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