Electronic Telegram No. 4025
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/2014 TG_64 (CATALINA)
     An apparently asteroidal object discovered in the course of the Catalina
Sky Survey last month (observer J. A. Johnson; discovery observations
tabulated below, as first published on MPEC 2014-U18, when it was given the
minor-planet designation 2014 TG_64) has been found by L. Denneau and R.
Wainscoat to show a non-stellar appearance with a poorly resolved nuclear
condensation (of mag 21.3-21.5) on three w-band exposures taken with the
Pan-STARRS1 telescope on Nov. 22.4 UT.  Follow-up r-band exposures taken by
Wainscoat, M. Micheli, and B. Bolin (queue observer was D. Woodworth) with
the Canada-France-Hawaii telescope on Nov. 23.2, tracked for the motion of
2014 TG_64 in variable weather conditions, show a slightly diffuse
appearance; the coma has a full-width at half-maximum of about 1".1,
compared to nearby stars with FWHM of about 0".75, with the magnitude given
as 20.9-21.5.

     2014 UT             R.A. (2000) Decl.       Mag.   Observer
     Oct. 14.29802    1 27 18.07   - 9 37 19.2   19.1   Johnson
          14.30592    1 27 17.66   - 9 37 19.3   19.2     "
          14.31382    1 27 17.46   - 9 37 17.1   19.2     "
          14.32173    1 27 17.11   - 9 37 16.9   19.3     "

Additional astrometry (including pre-discovery Pan-STARRS1 observations from
Oct. 3.5, with the magnitude given as 20.4-20.5), the following elliptical
orbital elements by G. V. Williams, and an ephemeris appear on MPEC 2014-W93.

                    Epoch = 2014 May  23.0 TT
     T = 2014 May  25.9880 TT         Peri. = 294.7675
     e = 0.782699                     Node  =  50.2926  2000.0
     q = 3.238940 AU                  Incl. =  22.2821
       a = 14.905304 AU    n = 0.0171275    P =  57.5 years


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2014 CBAT
2014 November 25                 (CBET 4025)              Daniel W. E. Green