MPEC 2007-X61 : 2007 XB23

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M.P.E.C. 2007-X61                                Issued 2007 Dec. 15, 16:17 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

                                   2007 XB23

Observations:
     K07X23B* C2007 12 14.56193 05 21 16.16 -59 32 19.0          17.8 R EX061E12
     K07X23B  C2007 12 14.56425 05 21 17.28 -59 33 13.4          17.5 R EX061E12
     K07X23B  C2007 12 14.57116 05 21 20.56 -59 35 50.2          17.7 R EX061E12
     K07X23B  C2007 12 14.57345 05 21 21.64 -59 36 41.8          17.5 R EX061E12
     K07X23B  C2007 12 14.58042 05 21 24.92 -59 39 13.7          17.4 R EX061E12
     K07X23B  C2007 12 14.58263 05 21 25.92 -59 40 01.5          17.7 R EX061E12
     K07X23B  C2007 12 14.58931 05 21 29.04 -59 42 21.9          17.7 R EX061E12
     K07X23B  C2007 12 14.59163 05 21 30.12 -59 43 09.7          17.5 R EX061E12
     K07X23B  C2007 12 15.47619 05 44 17.28 -62 49 23.2          18.3 R EX061E12
     K07X23B  C2007 12 15.47927 05 44 17.83 -62 50 02.1          18.2 R EX061E12

Observer details:
E12 Siding Spring Survey.  Observer R. H. McNaught.  Measurers E. C. Beshore,
    A. Boattini, G. J. Garradd, A. R. Gibbs, A. D. Grauer, R. E. Hill,
    R. A. Kowalski, S. M. Larson, R. H. McNaught.  0.5-m Uppsala Schmidt + CCD.

Orbital elements:
2007 XB23                                                Earth MOID = 0.0006 AU
Epoch 2007 Dec. 6.0 TT = JDT 2454440.5                  MPC
M 342.45086              (2000.0)            P               Q
n   0.92635811     Peri.  192.25693     -0.04692631     -0.98755267
a   1.0421977      Node   260.57266     +0.92884297     +0.01215166
e   0.0558894      Incl.    8.75333     +0.36748966     -0.15681855
P   1.06           H   27.1           G   0.15
From 10 observations 2007 Dec. 14-15.

Ephemeris:
2007 XB23                a,e,i = 1.04, 0.06, 9                   q = 0.9839
Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase     V
2007 12 16    05 49.57   -63 38.6    0.00778  0.985    93.0    86.5    19.6
2007 12 18    06 04.36   -65 19.2    0.0132   0.984    91.2    88.0    20.8
2007 12 20    06 11.33   -65 59.4    0.0186   0.984    90.5    88.4    21.5
2007 12 22    06 15.47   -66 21.3    0.0239   0.984    90.1    88.5    22.1
2007 12 24    06 18.23   -66 35.5    0.0293   0.984    90.0    88.3    22.5
2007 12 26    06 20.18   -66 45.8    0.0346   0.984    89.8    88.1    22.9

Sonia Keys                   (C) Copyright 2007 MPC           M.P.E.C. 2007-X61

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