• MPC Preparation (Info)

    • MPEC 1999-D28 : 1999 CZ118

    The following Minor Planet Electronic Circular may be linked-to from your own Web pages, but must not otherwise be redistributed electronically.

    A form allowing access to any MPEC is at the bottom of this page.

    Read MPEC 1999-D27 Read MPEC 1999-D29 

    M.P.E.C. 1999-D28                                Issued 1999 Feb. 27, 16:47 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.

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

                                  1999 CZ118

Observations:
     J99CB8Z* C1999 02 10.43319 11 05 43.05 +06 07 18.2          24.3 R      568
     J99CB8Z  C1999 02 10.47428 11 05 42.89 +06 07 18.7          24.3 R      568
     J99CB8Z  C1999 02 12.58336 11 05 34.59 +06 07 56.6          24.3 R      568
     J99CB8Z  C1999 02 12.63119 11 05 34.38 +06 07 57.5          24.3 R      568

Observer details:
568 Mauna Kea.  Observers D. Jewitt, C. Trujillo, J. X. Luu.  3.6-m
    Canada-France-Hawaii Telescope.

Orbital elements:
1999 CZ118
Eccentricity assumed
Epoch 1999 Feb. 11.0 TT = JDT 2451220.5                 Marsden
M 180.10825              (2000.0)            P               Q
n   0.00331433     Peri.  359.45917     +0.96408379     +0.21085769
a  44.5525312      Node   345.02333     -0.24127516     +0.44109072
e   0.0949955      Incl.   38.67696     -0.11103490     +0.87234054
P 297              H    7.8           G   0.15
From 4 observations 1999 Feb. 10-12.

Ephemeris:
1999 CZ118               a,e,i = 44.55, 0.09, 39                 q = 40.320
Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase     V
1999 02 21    11 05.00   +06 10.6   47.821   48.785   167.0     0.3    24.7
1999 03 03    11 04.29   +06 13.9   47.795   48.785   177.2     0.1    24.7
1999 03 13    11 03.58   +06 17.2   47.799   48.785   172.6     0.2    24.7
1999 03 23    11 02.88   +06 20.4   47.834   48.785   162.5     0.4    24.7
1999 04 02    11 02.22   +06 23.3   47.897   48.785   152.4     0.5    24.7
1999 04 12    11 01.63   +06 25.9   47.987   48.785   142.4     0.7    24.8
1999 04 22    11 01.11   +06 27.9   48.100   48.785   132.5     0.9    24.8
1999 05 02    11 00.70   +06 29.3   48.234   48.785   122.7     1.0    24.8
1999 05 12    11 00.39   +06 30.1   48.383   48.785   112.9     1.1    24.8
1999 05 22    11 00.20   +06 30.1   48.543   48.785   103.2     1.2    24.8
1999 06 01    11 00.14   +06 29.3   48.710   48.785    93.6     1.2    24.9
1999 06 11    11 00.20   +06 27.8   48.879   48.785    84.1     1.2    24.9
1999 06 21    11 00.39   +06 25.5   49.045   48.785    74.6     1.2    24.9
1999 07 01    11 00.69   +06 22.5   49.204   48.785    65.1     1.1    24.9
1999 07 11    11 01.10   +06 18.9   49.350   48.785    55.7     1.0    24.9
1999 07 21    11 01.61   +06 14.6   49.481   48.785    46.3     0.9    24.9
1999 07 31    11 02.21   +06 09.8   49.592   48.785    36.9     0.7    24.8

     This is the 100th Transneptunian Object (or Transneptunian candidate)
announced since the first success of the modern search program in 1992.
While distance determinations for these single-opposition objects are always
somewhat uncertain (particularly if the orbital eccentricity is significantly
greater than articipated), it appears that this may be the first solar-system
object ever observed at a heliocentric distance beyond 48 AU.

Brian G. Marsden             (C) Copyright 1999 MPC           M.P.E.C. 1999-D28

    Read MPEC 1999-D27 Read MPEC 1999-D29

    MPEC number:

    Enter an MPEC number in one of the following forms:

    • 1997-B01 (the full form)
    • J97B01 (the packed version of the full form)
    • B01 (the abbreviated form)