Electronic Telegram No. 4258
Central Bureau for Astronomical Telegrams
Mailing address:  Hoffman Lab 209; Harvard University;
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Prepared using the Tamkin Foundation Computer Network


COMET P/2016 B2 = P/2006 G1 (McNAUGHT)
     G. V. Williams, Minor Planet Center, has identifed recovery observations
of comet P/2006 G1 (cf. IAUCs 8699, 8703) on two nights of incidental
astrometry obtained with the 1.8-m Pan-STARRS1 telescope at Haleakala on Jan.
18 and Feb. 14:

     2016 UT             R.A. (2000) Decl.       Mag.
     Jan. 18.57014   11 35 18.77   -14 34 19.6   21.8
          18.58267   11 35 18.70   -14 34 24.3   22.2
          18.59516   11 35 18.65   -14 34 29.4   22.3
     Feb. 14.48664   11 27 39.62   -16 47 06.7   21.4
          14.49919   11 27 39.20   -16 47 08.7   21.6
          14.51172   11 27 38.80   -16 47 11.1   21.3
          14.52449   11 27 38.40   -16 47 13.6   21.5

The indicated correction to the prediction by Williams on MPC 89014 is
Delta(T) = -0.06 day.  The indicated correction to the prediction by S.
Nakano in the ICQ's 2015 Comet Handbook is Delta(T) = -0.15 day.  The
following linked orbital elements by Williams (from 121 observations
spanning 2006 Apr. 5-2016 Feb. 14; mean residual 0".5) and an ephemeris
appear on MPEC 2016-C201.

                    Epoch = 2017 Feb. 16.0 TT
     T = 2017 Feb.  3.04495 TT        Peri. = 308.48756
     e = 0.4462177                    Node  = 298.25889 2000.0
     q = 2.7815736 AU                 Incl. =  17.83946
       a =  5.0228650 AU   n = 0.08755417   P =  11.26 years


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2016 CBAT
2016 February 15                 (CBET 4258)              Daniel W. E. Green