[IAUC] CBET 3365: 20121230 : COMET P/2012 T7 (VOROBJOV)

[quai en eps.harvard.edu]

                                                  Electronic Telegram No. 3365
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 T7 (VOROBJOV)
     Further to CBET 3260, Rob Matson (Newport Coast, CA, USA) has identified
NEAT observations of this comet obtained with the Palomar 1.2-m Schmidt
telescope in 2000 and 2001 (astrometry tabulated below), and G. V. Williams
has confirmed the identity; Williams then identified prediscovery observations
acquired by A. Boattini at Mount Lemmon on 2011 Nov. 1 in incidental
astrometry sent to the Minor Planet Center, when the object's magnitude was
measured as being 21.1-21.8.

     2000 UT             R.A. (2000) Decl.       Mag.   Observer
     Dec. 19.52829    3 44 30.75   +10 47 53.3   19.7   NEAT
          19.53862    3 44 30.48   +10 47 50.9   19.3     "
          19.54877    3 44 30.27   +10 47 48.8   19.7     "

     2001 UT             R.A. (2000) Decl.       Mag.   Observer
     Jan. 20.21779    3 39 48.51   +10 18 07.2   20.3   NEAT
          20.22791    3 39 48.58   +10 18 08.1   20.4     "
          20.23806    3 39 48.65   +10 18 08.2   20.5     "

The newly identified astrometry, the following linked orbital elements by
Williams (from 136 observations 2000 Dec. 19-2012 Dec. 18; mean residual 0".4),
and an ephemeris appear on MPEC 2012-Y39.

                    Epoch = 2001 Jan. 11.0 TT
     T = 2001 Jan. 25.95682 TT        Peri. = 213.40513
     e = 0.2664769                    Node  = 216.39069 2000.0
     q = 3.9948244 AU                 Incl. =  14.65539
       a =  5.4460788 AU   n = 0.07754935   P =  12.71 years

                    Epoch = 2013 Jan. 28.0 TT
     T = 2013 Jan. 16.13888 TT        Peri. = 205.78754
     e = 0.2728633                    Node  = 214.30738 2000.0
     q = 3.9238623 AU                 Incl. =  14.46555
       a =  5.3963197 AU   n = 0.07862444   P =  12.54 years


NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2012 CBAT
2012 December 30                 (CBET 3365)              Daniel W. E. Green