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IAUC 9038: P/2009 F7; 217P

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                                                  Circular No. 9038
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 P/2009 F7 (LINEAR)
     On Mar. 31, the LINEAR team reported a single-night candidate
for the recovery of comet P/2003 H4 (cf. IAUCs 8127, 8135).  Today,
G. Sostero, E. Prosperi, E. Guido, and P. Camilleri reported their
recovery of this comet on 60-s unfiltered CCD exposures taken
remotely with a 0.35-m f/7 "Skylive" reflector at the Grove Creek
Observatory, Trunkey, New South Wales; thirty co-added images show
the object to have a central condensation and a diffuse coma nearly
15" in diameter.  The available astrometry is given below.  The
correction to the orbital elements on MPC 56804 (and to those in
the 2008/2009 Comet Handbook, p. 97) is Delta(T) = -0.13 day.

     2009 UT             R.A. (2000) Decl.       Mag.   Observer
     Mar. 31.30214   12 53 01.79   -27 12 26.6   19.4   LINEAR
          31.31444   12 53 01.53   -27 12 19.1   19.6     "
          31.32707   12 53 01.19   -27 12 07.6   19.8     "
          31.33954   12 53 00.84   -27 11 59.9   19.7     "
     Apr. 15.56030   12 48 07.64   -23 06 02.0   19.5   Sostero
          15.57870   12 48 07.29   -23 05 40.6   19.5     "
          15.59400   12 48 07.00   -23 05 22.6   19.5     "
          15.61201   12 48 06.66   -23 05 00.8   19.7     "
          15.62125   12 48 06.34   -23 04 50.5   19.7     "
          15.63049   12 48 06.10   -23 04 39.8   19.6     "

     The following orbital elements by B. G. Marsden are from 231
observations, 2003 Apr. 29-2009 Apr. 15 (mean residual 0".6).

                    Epoch = 2009 June 18.0 TT
     T = 2009 June 22.28618 TT        Peri. =  10.60506
     e = 0.4902703                    Node  = 226.74365 2000.0
     q = 1.7014372 AU                 Incl. =  18.15146
       a =  3.3379202 AU   n = 0.16161815   P =   6.10 years

     Additional orbital elements, residuals, and an ephemeris
appear on CBET 1767.


COMET 217P/2009 F3 (LINEAR)
     Comet P/2009 F3 = P/2001 MD_7 (cf. IAUC 9031) has been
assigned the permanent number 217P (cf. MPC 65561).

                      (C) Copyright 2009 CBAT
2009 April 15                  (9038)            Daniel W. E. Green

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