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Minor Planet Center

MPEC 2009-W101: COMET P/2009 W1 (HILL)

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M.P.E.C. 2009-W101                               Issued 2009 Nov. 24, 17:45 UT

     The Minor Planet Electronic Circulars contain information on unusual
         minor planets and routine data on comets.  They are published
   on behalf of Commission 20 of the International Astronomical Union by the
          Minor Planet Center, Smithsonian Astrophysical Observatory,
                          Cambridge, MA 02138, U.S.A.

             Prepared using the Tamkin Foundation Computer Network

                              MPC@CFA.HARVARD.EDU
          URL http://www.cfa.harvard.edu/iau/mpc.html  ISSN 1523-6714

                            COMET P/2009 W1 (HILL)

Observations:
    PK09W010  C2009 11 19.80456 09 47 26.65 +28 53 58.2          18.4 T EW101349
    PK09W010  C2009 11 19.81041 09 47 26.97 +28 53 58.7                 EW101349
    PK09W010  C2009 11 20.21686 09 47 48.45 +28 54 49.7          18.1 N EW101A77
    PK09W010  C2009 11 20.22466 09 47 48.84 +28 54 51.4          18.0 N EW101A77
    PK09W010  C2009 11 20.31934 09 47 54.01 +28 55 05.7          19.5 N EW101I10
    PK09W010  C2009 11 20.43781 09 47 59.93 +28 55 19.1          18.1 N EW101850
    PK09W010  C2009 11 20.45178 09 48 00.65 +28 55 20.2          18.6 N EW101850
    PK09W010  C2009 11 21.08992 09 48 33.84 +28 56 44.6          18.1 N EW101A79
    PK09W010  C2009 11 21.10012 09 48 34.36 +28 56 46.2          18.5 N EW101A79
    PK09W010  C2009 11 21.47133 09 48 53.27 +28 57 36.0                 EW101H06
    PK09W010  C2009 11 21.47318 09 48 53.45 +28 57 36.6          18.7 T EW101H06
    PK09W010  C2009 11 21.48092 09 48 53.95 +28 57 36.9          18.7 N EW101H10
    PK09W010  C2009 11 21.48447 09 48 53.96 +28 57 38.9          18.9 N EW101H10
    PK09W010  C2009 11 21.48801 09 48 54.28 +28 57 38.9          18.3 N EW101H10
    PK09W010  C2009 11 21.76850 09 49 08.51 +28 58 17.1                 EW101900
    PK09W010  C2009 11 21.77910 09 49 09.04 +28 58 18.5          18.5 T EW101900
    PK09W010  C2009 11 21.98280 09 49 19.45 +28 58 45.7          18.7 N EW101204
    PK09W010  C2009 11 22.01509 09 49 21.04 +28 58 50.2                 EW101204
    PK09W010  C2009 11 22.15161 09 49 28.03 +28 59 09.2          17.7 T EW101215
    PK09W010  C2009 11 22.15285 09 49 28.07 +28 59 09.4          17.8 T EW101215
    PK09W010  C2009 11 22.15408 09 49 28.10 +28 59 09.6          17.7 T EW101215
    PK09W010  C2009 11 22.29061 09 49 34.87 +28 59 33.4          19.2 N EW101I10
    PK09W010  C2009 11 22.46734 09 49 43.72 +28 59 55.7          18.9 N EW101H10
    PK09W010  C2009 11 22.47170 09 49 43.93 +28 59 56.1          19.9 N EW101H10
    PK09W010  C2009 11 22.47698 09 49 44.20 +28 59 57.9          19.6 N EW101H10
    PK09W010  C2009 11 23.38846 09 50 29.57 +29 02 08.7          18.8 N EW101H10
    PK09W010  C2009 11 23.39318 09 50 29.68 +29 02 11.1          19.0 N EW101H10
    PK09W010  C2009 11 23.39837 09 50 29.81 +29 02 14.8          18.1 N EW101H10
    PK09W010  C2009 11 23.48376 09 50 33.78 +29 02 26.7                 EW101H06
    PK09W010  C2009 11 23.48748 09 50 33.94 +29 02 27.6                 EW101H06
    PK09W010  C2009 11 23.49119 09 50 34.09 +29 02 28.6          18.3 T EW101H06

Observer details:
204 Schiaparelli Observatory.  Observer L. Buzzi.  0.60-m f/4.64 reflector
    + CCD.
215 Buchloe.  Observer W. Hasubick.  0.44-m f/4.6 reflector + CCD.
349 Ageo.  Observer K. Kadota.  0.25-m f/5.0 reflector + CCD.
850 Cordell-Lorenz Observatory, Sewanee.  Observers D. T. Durig,
    C. A. Thaddeus.  0.35-m f/6 Schmidt-Cassegrain + CCD.
900 Moriyama.  Observer Y. Ikari.  0.26-m f/7.0 reflector + CCD.
A77 Observatoire Chante-Perdrix, Dauban.  Observers C. Rinner, F. Kugel.
    Measurer F. Kugel.  0.5-m f/3 reflector + CCD.
A79 Zvezdno Obshtestvo Observatory, Plana.  Observers F. Fratev, B. Borisov.
    Measurer F. Fratev.  0.35-m f/3.4 reflector + CCD.
H06 RAS Observatory, Mayhill.  Observer H. Sato.  0.25-m f/3.4 reflector + CCD.
H10 Tzec Maun Observatory, Mayhill.  Observer L. Elenin.  0.36-m f/3.8
    Maksutov-Newtonian + CCD.
I10 Campo Catino Austral Obs., San Pedro de Atacama.  Observers A. Maury,
    T. Noel, F. Mallia, F. Kugel.  Measurer F. Kugel.  0.4-m f/8
    Ritchey-Chretien + CCD.

Orbital elements:
    P/2009 W1 (Hill)
T 2009 Sept. 10.190 TT                                  MPC
q   2.93817              (2000.0)            P               Q
n   0.107992       Peri.   49.150       -0.228383       -0.951533
a   4.36726        Node    55.223       +0.800664       -0.303933
e   0.32723        Incl.   14.523       +0.553875       +0.047003
P   9.13
From 57 observations 2009 Nov. 18-23.

Ephemeris:
    P/2009 W1 (Hill)
Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase   m1    m2
2009 11 15    09 43.00   +28 45.2    2.722    2.962    94.1    19.5  18.4
2009 11 25    09 51.77   +29 06.4    2.601    2.970   102.2    19.0  18.3
2009 12 05    09 58.57   +29 39.3    2.486    2.979   110.6    18.0  18.2
2009 12 15    10 03.14   +30 24.4    2.379    2.989   119.4    16.7  18.1
2009 12 25    10 05.25   +31 20.5    2.286    3.000   128.6    14.9  18.1
2010 01 04    10 04.76   +32 24.7    2.209    3.011   137.9    12.7  18.0
2010 01 14    10 01.71   +33 32.2    2.153    3.024   146.8    10.2  18.0
2010 01 24    09 56.37   +34 36.3    2.120    3.038   154.5     8.0  18.0

     Further observations of this comet are desirable.

Brian G. Marsden             (C) Copyright 2009 MPC           M.P.E.C. 2009-W101

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