Electronic Telegram No. 3219
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/2012 R1 = P/2006 Q2 (LONEOS)
     G. V. Williams has identified two sets of single-night CCD observations
sent to the Minor Planet Center (tabulated below) as belonging to comet P/2006
Q2 (cf. IAUC 8743).

     2012 UT             R.A. (2000) Decl.       Mag.   Observer
     Sept.11.94094    0 54 54.48   +23 59 09.2   20.1   Nevski
          11.95116    0 54 55.01   +23 59 09.6   20.0     "
          11.96140    0 54 55.60   +23 59 10.2   20.2     "
          11.97162    0 54 56.13   +23 59 10.3   20.1     "
          12.31411    0 55 17.74   +23 59 32.9   19.2   Holmes
          12.31991    0 55 18.05   +23 59 33.6   19.4     "
          12.32558    0 55 18.34   +23 59 33.7   19.3     "
          12.33080    0 55 18.64   +23 59 34.0   19.4     "

V. Nevski, D. Ivanov, A. Novichonok, and I. Kondratenko (ISON-Kislovodsk
  Observatory).  0.4-m f/3 reflector.
R. Holmes (Ashmore, IL, U.S.A.).  0.61-m f/4 astrograph.  Measured by
  T. Vorobjov, L. Buzzi, and S. Foglia.

     The indicated correction to the prediction by B. G. Marsden on MPC 65939
is Delta(T) = +0.80 day, and the indicated correction to the prediction by S.
Nakano in the ICQ's 2012 Comet Handbook (p. H10) is +0.45 day.  The following
linked orbital elements by Williams are from 153 observations spanning 2006
Aug. 29-2012 Sept. 12 (mean residual 0".5):

                    Epoch = 2012 Aug. 21.0 TT
     T = 2012 Aug. 22.79025 TT        Peri. =  97.19375
     e = 0.5934750                    Node  = 245.01358 2000.0
     q = 1.3361517 AU                 Incl. =   5.37352
       a =  3.2867635 AU   n = 0.16540605   P =   5.96 years


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2012 CBAT
2012 September 12                (CBET 3219)              Daniel W. E. Green