[IAUC] CBET 3248: 20121008 : COMET P/2012 S5 = P/1997 C1 (GEHRELS)
quai en eps.harvard.edu
quai en eps.harvard.edu
Lun Oct 8 09:02:40 ART 2012
Electronic Telegram No. 3248
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/2012 S5 = P/1997 C1 (GEHRELS)
G. V. Williams, Minor Planet Center, has identified observations of
comet P/1997 C1 (cf. IAUCs 6549, 6550, 6562) in incidental astrometry
submitted to the MPC (observations tabulated below); the Sept. 25 CCD
observations were obtained by A. D. Grauer with the Mount Lemmon 1.5-m
reflector, and the Oct. 8 observations were obtained by R. S. McMillan with
the Spacewatch 0.9-m f/3 reflector (+ CCD mosaic).
2012 UT R.A. (2000) Decl. Mag. Observer
Sept.25.37706 2 21 47.77 +15 08 44.1 19.2 Grauer
25.38277 2 21 47.66 +15 08 43.8 19.3 "
25.39530 2 21 47.44 +15 08 42.5 19.5 "
25.40104 2 21 47.34 +15 08 41.8 19.2 "
Oct. 8.25460 2 17 12.80 +14 40 20.6 19.7 McMillan
8.27226 2 17 12.32 +14 40 17.8 19.7 "
8.28992 2 17 11.84 +14 40 14.9 19.7 "
The indicated correction to the prediction by B. G. Marsden on MPC 69910 is
Delta(T) = -0.26 day. The following orbital elements by Williams are from
162 observations spanning 1997 Feb. 1-2012 Oct. 8 (mean residual 0".7).
An ephemeris and revised 1996 orbital elements appear on MPEC 2012-T24.
Epoch = 2013 July 7.0 TT
T = 2013 July 7.99372 TT Peri. = 210.93931
e = 0.4749514 Node = 225.28500 2000.0
q = 3.6016592 AU Incl. = 2.85500
a = 6.8596682 AU n = 0.05485919 P = 17.97 years
NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
superseded by text appearing later in the printed IAU Circulars.
(C) Copyright 2012 CBAT
2012 October 8 (CBET 3248) Daniel W. E. Green
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