• Processing (Info)

    • MPEC 2009-W23 : COMET P/2009 U4 (McNAUGHT)

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    M.P.E.C. 2009-W23                                Issued 2009 Nov. 18, 16:06 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 U4 (McNAUGHT)

Observations:
    PK09U040  C2009 11 09.77137 21 32 10.55 -26 09 51.3          18.4 N EW023204
    PK09U040  C2009 11 13.56270 21 41 19.88 -25 00 59.6          18.4 N EW023D25
    PK09U040  C2009 11 16.10948 21 47 24.79 -24 14 30.6          18.5 N EW023850
    PK09U040  C2009 11 16.11697 21 47 25.86 -24 14 22.2          18.6 N EW023850
    PK09U040  C2009 11 16.12444 21 47 26.84 -24 14 14.2          18.2 N EW023850

Observer details:
204 Schiaparelli Observatory.  Observer L. Buzzi.  0.38-m f/6.8 reflector
    + CCD.
850 Cordell-Lorenz Observatory, Sewanee.  Observer D. T. Durig.  0.30-m f/2.8
    Schmidt-Cassegrain + CCD.
D25 Tzec Maun Observatory, Pingelly.  Observers P. Concari, S. Foglia,
    G. Galli, M. Tombelli.  0.18-m f/2.8 Newtonian reflector + CCD.

Orbital elements:
    P/2009 U4 (McNaught)
T 2009 Sept.  9.0585 TT                                 MPC
q   1.648563             (2000.0)            P               Q
n   0.0866664      Peri.  259.8736      +0.7018159      +0.6974934
a   5.057108       Node    55.7202      -0.5655264      +0.6691048
e   0.674011       Incl.   10.0903      -0.4331678      +0.2565184
P  11.4
From 60 observations 2009 Oct. 11-Nov. 16.

Ephemeris:
    P/2009 U4 (McNaught)
Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase   m1    m2
2009 11 15    21 44.77   -24 34.8    1.548    1.802    87.6    33.3  17.5
2009 11 25    22 08.14   -21 30.2    1.672    1.847    83.8    32.1  17.8
2009 12 05    22 30.56   -18 24.7    1.805    1.897    79.8    30.8  18.1
2009 12 15    22 52.09   -15 20.7    1.946    1.950    75.6    29.3  18.3
2009 12 25    23 12.84   -12 20.2    2.093    2.007    71.3    27.7  18.6
2010 01 04    23 32.88   -09 24.6    2.245    2.066    66.8    25.9  18.9
2010 01 14    23 52.30   -06 34.9    2.401    2.127    62.2    24.1  19.2
2010 01 24    00 11.21   -03 51.8    2.558    2.191    57.4    22.2  19.4

     Further observations of this comet are desirable.

Brian G. Marsden             (C) Copyright 2009 MPC           M.P.E.C. 2009-W23

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