Electronic Telegram No. 3387
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/2013 B1 = P/2006 K2 (McNAUGHT)
     J. V. Scotti, Lunar and Planetary Laboratory, University of Arizona,
reports his recovery of comet P/2006 K2 (cf. IAUC 8714) on images
obtained with the Spacewatch 1.8-m f/2.7 reflector at Kitt Peak (astrometry
tabulated below); the object appeared very slightly diffuse on both nights
(with a possible tail, but aligned with a faint star trail and may not be
real on the Jan. 19 image; the comet was too close to a field star on Jan. 20
to determine anything about a tail).

     2013 UT             R.A. (2000) Decl.       Mag.   Observer
     Jan. 19.53190   13 54 18.15   -10 39 53.1   21.8   Scotti
          19.53935   13 54 18.62   -10 39 56.0   22.0     "
          19.54616   13 54 19.08   -10 39 59.5   21.9     "
          20.50575   13 55 23.23   -10 47 31.2   19.7     "
          20.51318   13 55 23.66   -10 47 34.2   21.0     "
          20.52061   13 55 24.18   -10 47 38.0   21.9     "

The indicated correction to the prediction by B. G. Marsden on MPC 69911
is Delta(T) = -0.17 day.  The following linked orbital elements by G. V.
Williams (from 98 observations spanning 2006 May 22-2013 Jan. 20; mean
residual 0".5) and an ephemeris appear on MPEC 2013-B58.

                    Epoch = 2013 Aug. 16.0 TT
     T = 2013 Aug.  2.49291 TT        Peri. = 237.99202
     e = 0.4332735                    Node  =  15.50186 2000.0
     q = 2.0977230 AU                 Incl. =   6.68168
       a =  3.7014734 AU   n = 0.13840192   P =   7.12 years


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2013 CBAT
2013 January 21                  (CBET 3387)              Daniel W. E. Green