Electronic Telegram No. 4090
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/2015 G1 = P/2008 S1 (CATALINA-McNAUGHT)
     An object found on infrared images taken with the Near-Earth Object
Wide-field Infrared Survey Explorer (or NEOWISE; formerly the WISE satellite)
(tabulated below; optical-wavelength magnitude estimated) has been
identified by G. V. Williams as recovery observations of comet P/2008 S1
(cf. IAUC 8977, 8978).

     2015 UT             R.A. (2000) Decl.      Mag.
     Apr.  5.67044   19 06 05.07   - 9 09 03.4   19
           5.93301   19 06 52.62   - 9 08 24.8
           6.06443   19 07 16.52   - 9 08 05.7
           6.19571   19 07 40.09   - 9 07 44.4
           6.58957   19 08 51.91   - 9 06 49.5
           6.78656   19 09 27.81   - 9 06 19.9
           6.98355   19 10 03.84   - 9 05 51.0
           7.18042   19 10 39.83   - 9 05 21.2
           7.18055   19 10 39.85   - 9 05 20.5
           7.44312   19 11 27.97   - 9 04 41.3
           7.77140   19 12 28.30   - 9 03 50.9
           8.09955   19 13 28.66   - 9 03 00.2
           8.09967   19 13 28.73   - 9 02 59.9
           8.23096   19 13 52.96   - 9 02 40.6

The indicated correction to the prediction by Williams on MPC 79350 is
Delta(T) = -0.11 day.  The following linked orbital elements by Williams
(from 76 observations spanning 2008 May 2-2015 Apr. 8) and an ephemeris
appear on MPEC 2015-G17.

                    Epoch = 2015 June 27.0 TT
     T = 2015 July  1.75534 TT        Peri. = 203.66504
     e = 0.6652763                    Node  = 111.36381 2000.0
     q = 1.1967322 AU                 Incl. =  15.07377
       a =  3.5752833 AU   n = 0.14579357   P =   6.76 years


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2015 CBAT
2015 April 9                     (CBET 4090)              Daniel W. E. Green