• MPC Preparation (Info)

    • MPEC 1999-K18 : 1999 HD12

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    M.P.E.C. 1999-K18                                Issued 1999 May 20, 22:06 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.

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

                                   1999 HD12

Observations:
     J99H12D* C1999 04 17.15461 12 31 54.80 -01 03 07.9          22.9 R      695
     J99H12D  C1999 04 17.21911 12 31 54.08 -01 03 01.5                      695
     J99H12D  C1999 04 17.29920 12 31 53.13 -01 02 56.0                      695
     J99H12D  C1999 04 18.18971 12 31 42.91 -01 01 39.8                      695
     J99H12D  C1999 05 05.86823 12 28 43.71 -00 39 31.4                      950
     J99H12D  C1999 05 05.92947 12 28 43.16 -00 39 28.4                      950
     J99H12D  C1999 05 05.99064 12 28 42.59 -00 39 24.4                      950

Observer details:
695 Kitt Peak.  Observers R. L. Millis, J. L. Elliot, M. J. Holman, R. M.
    Wagner, K. A. Falinski.  Measurers M. W. Buie, R. L. Millis, J. L. Elliot,
    K. A. Falinski.  4-m telescope + CCD.
950 La Palma.  Observers M. Holman, K. Aksnes, T. Grav, N. Haug.  Measurers
    M. Holman, T. Grav.  2.56-m telescope + CCD.

Orbital elements:
1999 HD12
Eccentricity assumed
Epoch 1999 Apr. 12.0 TT = JDT 2451280.5                 Marsden
M   0.07380              (2000.0)            P               Q
n   0.01606523     Peri.   12.23820     -0.98717053     +0.15941974
a  15.5552919      Node   176.89304     -0.15683664     -0.95765463
e   0.1673151      Incl.    9.48005     -0.02994351     -0.23975602
P  61.4            H   12.1           G   0.15
From 7 observations 1999 Apr. 17-May 5.

Ephemeris:
1999 HD12                a,e,i = 15.56, 0.17, 9                  q = 12.953
Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase     V
1999 05 12    12 27.91   -00 33.5   12.210   12.953   135.7     3.1    23.4
1999 05 22    12 26.87   -00 25.8   12.335   12.953   125.8     3.6    23.5
1999 06 01    12 26.25   -00 21.0   12.476   12.953   116.0     4.0    23.5
1999 06 11    12 26.07   -00 19.1   12.630   12.953   106.4     4.3    23.6
1999 06 21    12 26.34   -00 20.4   12.791   12.953    96.9     4.5    23.6
1999 07 01    12 27.07   -00 24.6   12.956   12.954    87.6     4.5    23.6
1999 07 11    12 28.23   -00 31.6   13.120   12.954    78.4     4.4    23.6
1999 07 21    12 29.81   -00 41.3   13.279   12.954    69.3     4.2    23.7
1999 07 31    12 31.78   -00 53.4   13.428   12.955    60.3     3.9    23.7
1999 08 10    12 34.10   -01 07.5   13.564   12.955    51.3     3.5    23.7
1999 08 20    12 36.72   -01 23.4   13.684   12.955    42.5     3.0    23.7
1999 08 30    12 39.60   -01 40.8   13.785   12.956    33.6     2.5    23.6

Brian G. Marsden             (C) Copyright 1999 MPC           M.P.E.C. 1999-K18

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