Electronic Telegram No. 4289
Central Bureau for Astronomical Telegrams
Mailing address:  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/2016 N2 = P/2008 T1 (BOATTINI)
     R. Weryk, Institute for Astronomy, University of Hawaii, has reported the
discovery of a possible comet in four w-band exposures taken with the 1.8-m
Pan-STARRS1 telescope at Haleakala on July 4 UT (discovery observations
tabulated below), noting that the object appears slightly larger than images
of nearby stars (FWHM approximately 1".4, vs. 1".2), with no clear evidence
of a tail, in stacked images.

     2016 UT             R.A. (2000) Decl.       Mag.
     July  4.49550   20 38 10.32   -18 04 19.0   20.4
           4.50619   20 38 09.99   -18 04 19.7   20.4
           4.51690   20 38 09.66   -18 04 20.5   20.3
           4.52762   20 38 09.33   -18 04 21.1   20.6

Weryk added that he thought it might possibly be an accidental recovery of
comet P/2008 T1 (cf. IAUC 8988).  Three 60-s follow-up CCD w-band exposures
were acquired by R. J. Wainscoat and C. Wipper with the 3.6-m Canada-France-
Hawaii Telescope (measured by M. Micheli and Wainscoat) on July 5.48 UT, which
showed a coma with FWHM about 0".9 in 0".7 seeing with a possible faint
very-low-surface-brightness tail to the west.  After the object was posted to
the MPC's NEOCP and PCCP webpages, A. C. Gilmore and P. M. Kilmartin
obtained CCD images with the Mount John 1.0-m f/7.7 reflector that yielded
total magnitude 19.3-19.8 on July 5.6.
     Williams has confirmed the identity of P/2016 N2 with P/2008 T1.  The
indicated correction to the prediction by Williams on MPEC 2013-C52 is
Delta(T) = +0.29 day.  The indicated correction to the prediction by S.
Nakano in the ICQ's 2015 Comet Handbook is +0.22 day.  The following linked
orbital elements by Williams (from 226 observations spanning 2006 May 25-2016
July 5; mean residual 0".7) and an ephemeris appear on MPEC 2016-N27.

                    Epoch = 2016 Nov. 28.0 TT
     T = 2016 Nov. 18.48449 TT        Peri. =  35.75982
     e = 0.2794390                    Node  = 291.76896 2000.0
     q = 3.0630400 AU                 Incl. =   2.07857
       a =  4.2509101 AU   n = 0.11245563   P =   8.76 years


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2016 CBAT
2016 July 6                      (CBET 4289)              Daniel W. E. Green