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    • MPEC 1998-X38 : 1998 WA31

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    Read MPEC 1998-X37 Read MPEC 1998-X39 

    M.P.E.C. 1998-X38                                Issued 1998 Dec. 14, 14:57 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

                                   1998 WA31

Observations:
     J98W31A* C1998 11 18.08751 02 14 16.22 +16 26 29.7          22.8 R      695
     J98W31A  C1998 11 18.15650 02 14 15.84 +16 26 27.9                      695
     J98W31A  C1998 11 18.24171 02 14 15.42 +16 26 26.1                      695
     J98W31A  C1998 11 19.07963 02 14 11.38 +16 26 06.3          22.5 R      695
     J98W31A  C1998 11 19.16041 02 14 11.00 +16 26 04.5                      695

Observer details:
695 Kitt Peak.  Observers R. L. Millis, M. W. Buie, R. M. Wagner, J. L. Elliot.
    Measurers M. W. Buie, R. L. Millis, J. L. Elliot.  4-m reflector + CCD.

Orbital elements:
1998 WA31
The following assumed 2:3 Neptune-resonance orbital elements
keep the object more than 17 AU from Neptune over a 14 000-year period
Epoch 1998 Nov. 3.0 TT = JDT 2451120.5                  Marsden
M 281.96916              (2000.0)            P               Q
n   0.00395586     Peri.  113.86750     -0.71551324     -0.69523247
a  39.5951758      Node    22.28761     +0.55707471     -0.62698316
e   0.1793171      Incl.   10.40610     +0.42155493     -0.35148818
P 249              H    7.1           G   0.15
From 5 observations 1998 Nov. 18-19.

Ephemeris:
1998 WA31                a,e,i = 39.60, 0.18, 10                 q = 32.495
Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase     V
1998 12 13    02 12.52   +16 17.7   38.656   39.365   135.6     1.0    23.2
1998 12 23    02 12.02   +16 15.0   38.784   39.360   125.3     1.2    23.2
1999 01 02    02 11.68   +16 13.0   38.929   39.355   115.0     1.3    23.2
1999 01 12    02 11.49   +16 11.7   39.088   39.350   104.8     1.4    23.2
1999 01 22    02 11.48   +16 11.3   39.254   39.345    94.6     1.4    23.2
1999 02 01    02 11.64   +16 11.8   39.422   39.340    84.5     1.4    23.2
1999 02 11    02 11.97   +16 13.1   39.588   39.335    74.5     1.4    23.3
1999 02 21    02 12.46   +16 15.4   39.746   39.330    64.5     1.3    23.3

Brian G. Marsden             (C) Copyright 1998 MPC           M.P.E.C. 1998-X38

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