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MPEC 1999-B27 : 1998 WZ31

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Read MPEC 1999-B26 Read MPEC 1999-B28 

M.P.E.C. 1999-B27                                Issued 1999 Jan. 28, 23:47 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

                                   1998 WZ31

Observations:
     J98W31Z* C1998 11 19.41122 03 35 42.14 +20 59 22.1          22.7 R      695
     J98W31Z  C1998 11 19.48013 03 35 41.68 +20 59 21.1                      695
     J98W31Z  C1998 12 18.08809 03 32 47.61 +20 51 35.1                      950
     J98W31Z  C1998 12 18.13019 03 32 47.34 +20 51 34.6                      950
     J98W31Z  C1998 12 18.17053 03 32 47.15 +20 51 33.6                      950
     J98W31Z  C1998 12 19.00361 03 32 42.74 +20 51 21.3                      950
     J98W31Z  C1998 12 19.07132 03 32 42.35 +20 51 20.4                      950
     J98W31Z  C1998 12 19.14566 03 32 41.90 +20 51 18.3                      950
     J98W31Z  C1999 01 14.26103 03 30 54.62 +20 46 26.2          23.1 R      695
     J98W31Z  C1999 01 15.16859 03 30 52.19 +20 46 20.3                      695

Observer details:
695 Kitt Peak.  Observers R. L. Millis, M. W. Buie, R. M. Wagner, J. L.
    Elliot, D. W. Willmarth, P. S. Smith, D. L. Harmer, A. Saha.  Measurers
    M. W. Buie, R. L. Millis, J. L. Elliot.  4-m reflector + CCD, 3.6-m
    WIYN Telescope + CCD.
950 La Palma.  Observers M. J. Holman, T. Grav.  2.6-m Nordic Optical
    Telescope + CCD.

Orbital elements:
1998 WZ31
The following assumed perihelic 2:3 Neptune-resonance orbital elements
keep the object more than 13 AU from Neptune over a 14 000-year period
Epoch 1998 Dec. 13.0 TT = JDT 2451160.5                 Marsden
M   0.09430              (2000.0)            P               Q
n   0.00396680     Peri.    6.28146     +0.54967045     -0.81232165
a  39.5223087      Node    50.56157     +0.75504411     +0.38325313
e   0.1636460      Incl.   14.61920     +0.35745040     +0.43960276
P 248              H    8.0           G   0.15
From 10 observations 1998 Nov. 19-1999 Jan. 15.

Ephemeris:
1998 WZ31                a,e,i = 39.52, 0.16, 15                 q = 33.055
Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase     V
1999 01 22    03 30.62   +20 45.7   32.644   33.055   113.9     1.6    23.4
1999 02 01    03 30.42   +20 45.4   32.808   33.055   103.7     1.7    23.4
1999 02 11    03 30.44   +20 45.8   32.979   33.055    93.6     1.7    23.4
1999 02 21    03 30.68   +20 46.9   33.152   33.055    83.5     1.7    23.4
1999 03 03    03 31.13   +20 48.8   33.321   33.055    73.6     1.6    23.4
1999 03 13    03 31.77   +20 51.4   33.482   33.055    63.7     1.5    23.4
1999 03 23    03 32.61   +20 54.6   33.631   33.055    54.0     1.4    23.4
1999 04 02    03 33.60   +20 58.5   33.762   33.055    44.4     1.2    23.4
1999 04 12    03 34.74   +21 02.9   33.873   33.055    34.8     1.0    23.4

Brian G. Marsden             (C) Copyright 1999 MPC           M.P.E.C. 1999-B27

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