Electronic Telegram No. 3116
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 H1 (PANSTARRS)
     G. V. Williams, Minor Planet Center, has linked single-night sets of
astrometry from 2002 (found by Rob Matson, Newport Coast, CA, USA, in online
NEAT data) and 2003 (found by Williams from CCD mosaic observations obtained
by M. T. Read with the Kitt Peak 0.9-m f/3 Spacewatch reflector) to comet
P/2012 H1 (cf. CBET 3097).

     2002 UT             R.A. (2000) Decl.       Mag.   Observer
     Mar. 11.33716   10 51 09.12   +13 18 12.0   20.7   NEAT
          11.34758   10 51 08.72   +13 18 14.6   20.7     "
          11.35818   10 51 08.36   +13 18 17.5   21.0     "

     2003 UT             R.A. (2000) Decl.       Mag.   Observer
     May  27.26077   14 54 08.46   - 7 34 37.9   20.5   Read
          27.28887   14 54 07.49   - 7 34 36.7   20.7     "
          27.31795   14 54 06.51   - 7 34 35.5   21.1     "

The following orbital elements by Williams are from 32 observations spanning
2002 Mar. 11-2012 May 2 (mean residual 0".45).  An ephemeris appears on
MPEC 2012-K42.

                    Epoch = 2002 Jan.  6.0 TT
     T = 2002 Jan.  9.16739 TT        Peri. =  25.87061
     e = 0.2109174                    Node  = 126.36020 2000.0
     q = 3.4574154 AU                 Incl. =   6.75259
       a =  4.3815633 AU   n = 0.10746336   P =   9.17 years

                    Epoch = 2011 Mar. 20.0 TT
     T = 2011 Mar. 18.75987 TT        Peri. =  25.77233
     e = 0.2091819                    Node  = 126.34386 2000.0
     q = 3.4793860 AU                 Incl. =   6.74531
       a =  4.3997298 AU   n = 0.10679848   P =   9.23 years


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2012 CBAT
2012 May 22                      (CBET 3116)              Daniel W. E. Green