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IAUC 8599: P/1998 W1 = P/2005 R3

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                                                  Circular No. 8599
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT@CFA.HARVARD.EDU (science)
URL http://cfa-www.harvard.edu/iau/cbat.html  ISSN 0081-0304
Phone 617-495-7440/7244/7444 (for emergency use only)


COMET P/1998 W1 = P/2005 R3 (SPAHR)
     This comet has been recovered on CCD images taken by F. Fratev
and E. Mihaylova (Zvezdno Obshtestvo Obsevatory, Plana, 0.25-m
f/4.7 reflector) and by E. J. Christensen (Catalina 0.68-m Schmidt
telescope); Christensen noted a coma diameter of approximately 15"
on 60-s exposures through thin clouds.

     2005 UT             R.A. (2000) Decl.       Mag.   Observer
     Sept. 7.08697    7 53 54.28   +17 37 11.4   17.3   Fratev
           7.09583    7 53 55.62   +17 37 10.7   17.3     "
           7.47821    7 54 57.48   +17 37 38.2   17.2   Christensen
           7.48347    7 54 58.29   +17 37 38.8   17.3     "
           7.48759    7 54 59.04   +17 37 38.8   17.2     "
           7.48935    7 54 59.29   +17 37 40.0   17.7     "
           7.49418    7 55 00.15   +17 37 40.0   17.2     "
           7.49593    7 55 00.26   +17 37 40.5   17.7     "
           7.49766    7 55 00.62   +17 37 39.9   17.5     "
           7.49942    7 55 00.87   +17 37 40.1   18.0     "
          10.11091    8 02 03.12   +17 40 21.7   17.3   Fratev
          10.11661    8 02 03.97   +17 40 21.3   17.3     "
          10.12247    8 02 04.95   +17 40 22.2   17.3     "
          11.12051    8 04 46.07   +17 41 18.5   17.3     "
          11.13110    8 04 47.54   +17 41 13.9   17.3     "

The indicated correction to the predictions on MPC 45657 and in the
Comet Handbook 2005 is Delta(T) = -0.2 day.  Orbital elements by
B. G. Marsden, from 273 observations, 1998 Nov. 13-2005 Sept. 11
(mean residual 0".6).

                    Epoch = 1999 Jan. 22.0 TT
     T = 1999 Jan. 17.9523 TT         Peri. = 346.6774
     e = 0.510065                     Node  = 101.9735  2000.0
     q = 1.725761 AU                  Incl. =  21.9615
       a =  3.522428 AU    n = 0.1490874    P =   6.611 years

                    Epoch = 2005 Aug. 18.0 TT
     T = 2005 Sept. 3.2187 TT         Peri. = 346.8442
     e = 0.509476                     Node  = 101.9200  2000.0
     q = 1.729675 AU                  Incl. =  21.9542
       a =  3.526182 AU    n = 0.1488494    P =   6.622 years

                      (C) Copyright 2005 CBAT
2005 September 12              (8599)            Daniel W. E. Green

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