MPEC 1999-A15: 1998 WS31
The following Minor Planet Electronic Circular may be linked-to from your own Web pages, but must not otherwise be redistributed electronically.
Read MPEC 1999-A14
Read MPEC 1999-A16
M.P.E.C. 1999-A15 Issued 1999 Jan. 11, 19:30 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 WS31
Observations:
J98W31S* 1998 11 18.09812 02 17 37.85 +16 33 43.0 22.5 R 695
J98W31S 1998 11 18.16698 02 17 37.44 +16 33 41.4 695
J98W31S 1998 11 18.24713 02 17 36.96 +16 33 39.1 695
J98W31S 1998 12 17.84201 02 15 13.98 +16 21 24.9 23.1 R 950
J98W31S 1998 12 17.87639 02 15 13.85 +16 21 24.2 950
J98W31S 1998 12 17.91186 02 15 13.72 +16 21 23.7 950
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.
950 La Palma. Observers M. J. Holman, T. Grav. Measurers T. Grav,
M. J. Holman, M. W. Buie. 2.6-m Nordic Optical Telescope + CCD.
Orbital elements:
1998 WS31
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 Nov. 23.0 TT = JDT 2451140.5 Marsden
M 0.02009 (2000.0) P Q
n 0.00395651 Peri. 22.37248 +0.78493100 -0.61873885
a 39.5908209 Node 15.98024 +0.54919196 +0.67064603
e 0.2041100 Incl. 6.74510 +0.28683012 +0.40914075
P 249 H 8.1 G 0.15
From 6 observations 1998 Nov. 18-Dec. 17.
Ephemeris:
1998 WS31 a,e,i = 39.59, 0.20, 7 q = 31.510
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
1999 01 02 02 14.56 +16 17.5 31.071 31.510 115.7 1.6 23.3
1999 01 12 02 14.36 +16 16.0 31.233 31.510 105.5 1.7 23.3
1999 01 22 02 14.38 +16 15.6 31.404 31.510 95.3 1.8 23.3
1999 02 01 02 14.62 +16 16.3 31.577 31.510 85.2 1.8 23.3
1999 02 11 02 15.06 +16 18.1 31.748 31.510 75.2 1.7 23.3
1999 02 21 02 15.71 +16 21.0 31.911 31.510 65.3 1.6 23.3
1999 03 03 02 16.55 +16 24.8 32.062 31.510 55.4 1.5 23.3
1999 03 13 02 17.55 +16 29.6 32.196 31.510 45.7 1.3 23.3
1999 03 23 02 18.69 +16 35.1 32.311 31.510 36.1 1.1 23.3
Brian G. Marsden (C) Copyright 1999 MPC M.P.E.C. 1999-A15
Read MPEC 1999-A14
Read MPEC 1999-A16
Our Web policy. Index to the CBAT/MPC/ICQ pages.
