Electronic Telegram No. 3535
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 C/2013 K1 (CHRISTENSEN)
     Eric J. Christensen reports his discovery of a comet on CCD images
taken with the Mt. Lemmon 1.5-m reflector (discovery observations tabulated
below), noting a 10" coma with a tail about 20" long toward p.a. 250 deg in
four 30-s survey images; four co-added 60-s follow-up images taken in
encroaching twilight on May 18.47 UT show a 30" tail toward p.a. 250 deg.

     2013 UT             R.A. (2000) Decl.       Mag.   Observer
     May  18.45513   23 17 53.95   +16 57 00.1   17.4   Christensen
          18.45865   23 17 55.09   +16 56 52.6   17.4     "
          18.46216   23 17 56.24   +16 56 45.0   17.6     "
          18.46568   23 17 57.38   +16 56 37.2   17.5     "
          18.46831   23 17 58.18   +16 56 31.8   17.5     "
          18.46924   23 17 58.47   +16 56 29.6   17.5     "
          18.47017   23 17 58.81   +16 56 27.6   17.6     "
          18.47108   23 17 59.08   +16 56 25.8   17.5     "
          18.47442   23 18 00.15   +16 56 18.7   17.3     "
          18.47499   23 18 00.35   +16 56 17.2   17.6     "
          18.47554   23 18 00.49   +16 56 16.0   17.5     "
          18.47610   23 18 00.69   +16 56 15.0   17.5     "

The available astrometry, the following preliminary parabolic orbital
elements by G. V. Williams, and an ephemeris appear on MPEC 2013-K26.

     T = 2013 May  29.9845 TT         Peri. = 171.0138
                                      Node  = 126.0814  2000.0
     q = 0.949349 AU                  Incl. =  42.2641


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2013 CBAT
2013 May 20                      (CBET 3535)              Daniel W. E. Green