The following improved orbital elements by Kenji Muraoka,
are from 360 observations 1990 Nov. 11 to 1999 Apr. 15,
including 9 Planets Moon and 5 minor planets perturbations
and non-gravitational effect of style II.
The mean residual is +/- 0.87 arc seconds.
Epoch = 1997 Dec. 18.0 TT JDT = 2450800.5
T = 1997 Dec. 12.27163 +/- 0.00318 (m.e.) TT
Peri. = 355.37636 +/- 0.00139
Node = 108.85859 +/- 0.00003 (2000.0)
Incl. = 20.54699 +/- 0.00003
q = 1.9478423 +/- 0.0000022 AU
e = 0.4659871 +/- 0.0000027
a = 3.6475567 +/- 0.0000052 AU
n = 0.14148194 +/- 0.00000030
P = 6.966 +/- 0.0000148 years
A1 = +2.238 +/- 0.268
A2 = +0.60905 +/- 0.05127