[IAUC] CBET 3603: 20130727 : COMET P/2013 O1 = P/1998 Y1 (LI)
quai en eps.harvard.edu
quai en eps.harvard.edu
Sab Jul 27 12:10:34 ART 2013
Electronic Telegram No. 3603
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 O1 = P/1998 Y1 (LI)
R. H. McNaught has suggested the identity with P/1998 Y2 (cf. IAUC 7075)
of a comet displaying a slightly diffuse circular coma of diamter about 12"
that he found on images taken with the 0.5-m Uppsala Schmidt telescope at
Siding Spring on July 24 and 26 -- an identification confirmed by G. V.
Williams, Minor Planet Center. H. Sato (Tokyo, Japan) has identified nearly
stellar pre-recovery images of the comet on ten stacked 60-s exposures taken
on May 9.8 UT with a 0.51-m f/6.8 astrograph at Siding Spring (iTelescope.net).
T. Spahr identified apparently asteroidal observations reported by M. Masek
(Liberec, Czech Republic) on July 16.4 from exposures taken with a 0.3-m f/10
reflector located at Malargue,Mendoza, Argentina, and reported to the MPC.
2013 UT R.A. (2000) Decl. Mag. Observer
May 9.79570 0 16 15.46 -20 01 16.5 Sato
9.79866 0 16 15.66 -20 01 15.8 20.4 "
July 16.38706 1 41 32.53 -18 36 54.6 19.7 Masek
16.39420 1 41 32.88 -18 36 55.4 19.6 "
16.40064 1 41 33.19 -18 36 56.2 20.1 "
24.75334 1 49 43.09 -19 01 34.3 18.6 McNaught
24.77779 1 49 44.49 -19 01 39.9 19.4 "
26.73367 1 51 31.73 -19 08 43.2 18.7 "
26.74206 1 51 32.22 -19 08 45.0 19.1 "
26.75040 1 51 32.62 -19 08 46.9 19.1 "
The indicated correction to the prediction by S. Nakano on MPC 75730 is
Delta(T) = +0.85 day. The following linked orbital elements by Williams are
from 49 observations spanning 1998 Sept. 23-2013 July 26 (mean residual 0".7):
Epoch = 2014 Jan. 23.0 TT
T = 2014 Feb. 4.82821 TT Peri. = 319.05802
e = 0.5879150 Node = 91.86356 2000.0
q = 2.5223583 AU Incl. = 24.35756
a = 6.1209662 AU n = 0.06508398 P = 15.14 years
NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
superseded by text appearing later in the printed IAU Circulars.
(C) Copyright 2013 CBAT
2013 July 27 (CBET 3603) Daniel W. E. Green
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