Electronic Telegram No. 3396
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@eps.harvard.edu (alternate cbat@iau.org)
URL http://www.cbat.eps.harvard.edu/index.html
Prepared using the Tamkin Foundation Computer Network


COMET P/2009 QG_31 (LA SAGRA)
     Images of this comet (cf. IAUC 9078) have been identified independently
from its 2003 return to perihelion by R. Matson (Irvine, CA, U.S.A.) on
Palomar NEAT images taken by E. Helin et al. with the 1.2-m Schmidt telescope
in July 2002 and by K. Sarneczky (Szeged, Hungary) on images taken by J.
Krzesinski et al. with the Apache Point Observatory 2.5-m telescope in
December 2003 (astrometry tabulated below).

     2002 UT             R.A. (2000) Decl.       Mag.   Observer
     July 11.26358   19 35 25.81   -28 44 44.0   19.8   Helin
          12.32575   19 34 29.48   -28 45 51.0   19.8     "
          12.38869   19 34 25.96   -28 45 54.8   20.0     "
          15.25207   19 31 52.99   -28 48 23.5   19.6     "
          15.27314   19 31 51.79   -28 48 23.9   19.6     "
          15.29426   19 31 50.62   -28 48 25.3            "

     2003 UT             R.A. (2000) Decl.       Mag.   Observer
     Dec. 21.24714    5 47 41.87   +30 39 11.7   21.5   Krzesinski
          21.24797    5 47 41.81   +30 39 11.7            "
          21.25046    5 47 41.66   +30 39 11.4            "

     The following linked orbital elements by G. V. Williams (from 131
observations spanning 2002 July 11-2009 Nov. 17; mean residual 0".5)
and an ephemeris appear on MPEC 2013-C07.

                    Epoch = 2003 Jan.  1.0 TT
     T = 2003 Jan. 16.44171 TT        Peri. =   6.27485
     e = 0.4002076                    Node  = 346.31876 2000.0
     q = 2.1402132 AU                 Incl. =   5.05774
       a =  3.5682566 AU   n = 0.14622444   P =   6.74 years

                    Epoch = 2009 Oct. 16.0 TT
     T = 2009 Oct. 10.47669 TT        Peri. =   5.94681
     e = 0.3991219                    Node  = 346.25973 2000.0
     q = 2.1477627 AU                 Incl. =   5.05502
       a =  3.5743732 AU   n = 0.14584926   P =   6.76 years


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2013 CBAT
2013 February 2                  (CBET 3396)              Daniel W. E. Green