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IAUC 9085: C/2009 U1; P/2009 U2

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IAUC number 

                                                  Circular No. 9085
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://www.cfa.harvard.edu/iau/cbat.html  ISSN 0081-0304
Phone 617-495-7440/7244/7444 (for emergency use only)


COMET C/2009 U1 (GARRADD)
     G. J. Garradd, Siding Spring Observatory, reports his
discovery of a comet with the 0.5-m Uppsala Schmidt telescope
(discovery observation tabulated below); stacking five 60-s
exposures showed a 7".4 coma (FWHM) and faint fan tail 30" long in
p.a. 160 deg with a 45-deg fan angle.

     2009 UT             R.A. (2000) Decl.       Mag.   Observer
     Oct. 17.71474    4 25 38.40   -39 15 50.6   19.6   Garradd

Additional astrometry, the following very preliminary parabolic
orbital elements, and an ephemeris appear on MPEC 2009-U27:

     T = 2010 July  7.819 TT          Peri. =   6.404
                                      Node  =  67.196   2000.0
     q = 2.96357 AU                   Incl. =  68.944


COMET P/2009 U2 (LINEAR)
     J. V. Scotti reports his recovery of comet P/2001 YX_127 (cf.
IAUC 7828) with the Spacewatch II telescope at Kitt Peak; the comet
was very slightly diffuse, with a short but faint tail.  The
indicated correction to the prediction in the 2009/2010 Comet
Handbook is Delta(T) = -0.33 day [and Delta(T) = -0.36 day to the
prediction on MPC 62881].

     2009 UT             R.A. (2000) Decl.       Mag.   Observer
     Oct. 18.45096    3 23 08.99   +21 29 50.3   20.9   Scotti
          18.46185    3 23 08.66   +21 29 50.2   21.0     "
          18.47364    3 23 08.29   +21 29 49.7   20.9     "
          19.27723    3 22 42.50   +21 29 33.1   21.2     "
          19.28834    3 22 42.12   +21 29 33.1   21.5     "
          19.30024    3 22 41.71   +21 29 32.4   21.0     "

The following orbital elements (from observations 2001-2009), with
residuals and an ephemeris, appear on MPEC 2009-U40.

                    Epoch = 2011 Aug. 27.0 TT
     T = 2011 Aug. 23.8431 TT         Peri. = 114.7933
     e = 0.177193                     Node  =  31.0664  2000.0
     q = 3.430474 AU                  Incl. =   7.9154
       a =  4.169232 AU    n = 0.1157764    P =   8.51 years

                      (C) Copyright 2009 CBAT
2009 October 21                (9085)            Daniel W. E. Green

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