S.E.Guryanov and Guide Users,
The Center for Astrophysics and Panetary Science at Harvard (CFAPS)
has up-to date elements for 1998 WT2 24 based on 48 obsevations at two
oppositions, 1998-2000. They are:

1998 WT24
Epoch 2001 Oct. 18.0 TT = JDT 2452200.5 Williams
M 115.95149 (2000.0) P Q
n 1.62000323 Peri. 167.37392 -0.34883898 +0.92849991
a 0.7180017 Node 82.09999 -0.87063464 -0.27080347
e 0.4184508 Incl. 7.38268 -0.34685255 -0.25407360
P 0.61 H 17.7 G 0.15 U 4
From 48 observations at 2 oppositions, 1998-2000, mean residual 0".67.
Orbital elements from MPC 38537.

Here is a geocentric ephemeris calculated from these elements for
2001 Dec 14.0 to 2001 Dec 16.0 at 0.1-day intervals. It shows that the
asteroid will approach Earth to 0.013 AU on 2001 Dec 14.5 UT and shine
at magnitude 9.1. But it will be moving VERY fast and will be brighter
than magnitude 10.0 for only a couple of days. For a given location a
topocentric ephemeris should be calculated.

1998 WT24 a,e,i = 0.72, 0.42, 7 Elements MPC 38537
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2001 12 14.0 07 00.83 +25 04.5 0.017 1.000 158.2 21.5 9.9
2001 12 14.1 06 56.10 +25 49.3 0.017 1.000 159.3 20.4 9.8
2001 12 14.2 06 51.12 +26 35.3 0.016 1.000 160.5 19.2 9.7
2001 12 14.3 06 45.86 +27 22.6 0.016 1.000 161.6 18.1 9.7
2001 12 14.4 06 40.31 +28 11.0 0.016 0.999 162.8 16.9 9.6
2001 12 14.5 06 34.44 +29 00.4 0.015 0.999 163.9 15.8 9.5
2001 12 14.6 06 28.23 +29 50.7 0.015 0.999 165.0 14.8 9.4
2001 12 14.7 06 21.68 +30 41.9 0.015 0.999 166.0 13.8 9.3
2001 12 14.8 06 14.75 +31 33.6 0.014 0.998 166.9 12.9 9.3
2001 12 14.9 06 07.44 +32 25.7 0.014 0.998 167.5 12.3 9.2
2001 12 15.0 05 59.72 +33 18.0 0.014 0.998 168.0 11.8 9.1
2001 12 15.1 05 51.58 +34 10.1 0.014 0.998 168.1 11.7 9.1
2001 12 15.2 05 43.00 +35 01.7 0.014 0.998 167.9 11.9 9.1
2001 12 15.3 05 33.97 +35 52.4 0.013 0.997 167.4 12.4 9.1
2001 12 15.4 05 24.50 +36 41.8 0.013 0.997 166.5 13.3 9.1
2001 12 15.5 05 14.58 +37 29.6 0.013 0.997 165.3 14.5 9.1
2001 12 15.6 05 04.22 +38 15.1 0.013 0.997 163.9 15.9 9.1
2001 12 15.7 04 53.42 +38 57.9 0.013 0.996 162.2 17.5 9.1
2001 12 15.8 04 42.23 +39 37.6 0.013 0.996 160.4 19.3 9.2
2001 12 15.9 04 30.67 +40 13.6 0.013 0.996 158.5 21.3 9.2
2001 12 16.0 04 18.78 +40 45.6 0.013 0.996 156.4 23.3 9.3

This will be very interesting to observe. Thanks for calling it to
our attention.
Truman

Truman P. Kohman, Departments of Chemistry and Physics
Carnegie-Mellon University, Pittsburgh, PA 15213 USA
Phone: 412/268-8865, 412/561-8343 Fax: 412/681-0648
Internet - ASCII messages and documents: tk11+@...
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