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IAUC 9097: P/2009 S1 = P/2001 Q10; P/2009 W1; V496 Sct

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IAUC number 

                                                  Circular No. 9097
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 S1 = P/2001 Q10 (GIBBS)
     R. Matson (Irvine, CA) has identified astrometric observations
of this comet (cf. IAUC 9074) on NEAT 1.2-m reflector frames taken
on 2001 Aug. 23 and 24 at Haleakala and on 2001 Sept. 24 and Oct. 27
at Palomar.

     2001 UT             R.A. (2000) Decl.       Mag.
     Aug. 23.60821    2 14 09.59   - 6 22 20.8   20.0
          24.61243    2 14 47.80   - 6 35 40.8   20.2
     Sept.24.48475    2 22 42.84   -14 38 01.7   19.8
          24.50631    2 22 42.65   -14 38 22.6   19.3
     Oct. 27.27596    2 09 16.92   -22 00 18.3   19.3
          27.28631    2 09 16.49   -22 00 23.6   19.9
          27.29669    2 09 16.13   -22 00 28.7   19.7

The following revised orbital elements by B. G. Marsden link the
2001 and 2009 apparitions; 2001 elements and residuals appear on
MPEC 2009-X01.

                    Epoch = 2009 July 28.0 TT
     T = 2009 Aug.  4.1741 TT         Peri. = 224.0034
     e = 0.378003                     Node  = 157.9798  2000.0
     q = 2.440203 AU                  Incl. =  26.1102
       a =  3.923174 AU    n = 0.1268375    P =   7.77 years


COMET P/2009 W1 (HILL)
     Additional astrometry has shown that this comet (cf. IAUC 9095)
is of short period; orbital elements from MPEC 2009-W147:

     T = 2009 Sept.26.669 TT          Peri. =  52.372
     e = 0.33828                      Node  =  56.066   2000.0
     q = 2.97739 AU                   Incl. =  14.625
       a =  4.49949 AU     n = 0.103266     P =   9.54 years


V496 SCUTI
     Visual magnitude estimates (cf. IAUC 9095):  Nov. 19.726 UT,
7.2 (K. Hornoch, Vohancice, Czech Republic); 21.719, 7.4 (P.
Schmeer, Bischmisheim, Germany); 22.067, 7.5 (C. Hergenrother,
Tucson, AZ, U.S.A.); 25.672, 7.5 (K. Sarneczky, Budapest, Hungary);
26.708, 7.4 (W. Vollmann, Vienna, Austria); 27.065, 7.5
(Hergenrother); 28.683, 7.2 (Sarneczky).

                      (C) Copyright 2009 CBAT
2009 December 1                (9097)            Daniel W. E. Green

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