OAA computing section circular NK 704 99P/Kowal 1
The following improved orbital elements, by S. Nakano, are from 40 observations 1977-1995. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.78 arc second. Epoch = 1992 Feb. 28.0 TT T = 1992 Mar. 13.90491 +/- 0.00260 (m.e.) TT Peri. = 174.78644 +/- 0.00052 Node = 28.77289 +/- 0.00045 (2000.0) Inc. = 4.39196 +/- 0.00006 q = 4.6722673 +/- 0.0000035 AU e = 0.2324738 +/- 0.0000005 a = 6.0874371 +/- 0.0000010 AU n' = 0.06562244 +/- 0.00000002 P = 15.019 +/- 0.0000038 years T = 1977 Jan. 1.69893 TT Epoch = 1977 Jan. 17.0 TT Peri. = 172.44695 e = 0.2351699 Node = 29.11452 (2000.0) a = 6.0920636 AU Inc. = 4.39571 n'= 0.06554770 q = 4.6593935 AU P = 15.036 years The predicted orbit for the 2007 return is as follows: T = 2007 Jan. 15.71759 TT Epoch = 2007 Jan. 20.0 TT Peri. = 172.82639 e = 0.2271961 Node = 28.39935 (2000.0) a = 6.1054353 AU Inc. = 4.34512 n'= 0.06533248 q = 4.7183044 AU P = 15.086 years The following residuals in seconds of arc are from the above orbital elements: 770424 675 0.2- 1.6+ 910320 372 0.2- 0.0 920423 809 1.5+ 0.7+ 770425 675 0.2+ 0.9+ 910320 372 0.1- 1.2+ 920423 809 1.6+ 1.4+ 770426 675 0.1- 1.2+ 910403 372 0.4- 0.7- 920423 809 (3.4+ 0.4+) 770517 675 0.2- 1.4+ 910403 372 0.2+ 0.2+ 920425 809 0.3- 0.7- 770519 675 0.0 1.3+ 920226 372 0.6+ 0.5- 920425 809 0.7- 0.5- 770613 675 0.4+ 0.3+ 920227 372 0.2- 1.2- 920425 809 0.2- 0.9- 770617 801 2.2+ 2.1- 920305 691 1.1- 0.7- 920425 691 0.3+ 0.1+ 910220 413 (3.5+ 0.2-) 920305 691 1.2- 0.6- 920425 691 0.1+ 0.0 910221 691 0.1+ 0.6- 920305 691 0.9- 0.5- 920425 691 0.4+ 0.4+ 910221 691 0.1- 0.3- 920305 691 1.0- 0.8- 950621 691 0.7+ 0.3+ 910221 691 0.1- 0.3- 920305 691 1.2- 0.6- 950621 691 0.3- 0.3+ 910222 691 0.1+ 0.7+ 920305 691 1.6- 0.6- 950621 691 0.6- 0.4- 910222 691 0.4+ 0.7+ 920307 691 0.8+ 0.8- 950621 691 0.2+ 0.0 910222 691 0.2+ 0.6+ 920307 691 (3.6+ 0.7-) 910222 691 0.7+ 0.4+ 920307 691 0.1- 0.8- ( ) -------- Rejected Obs.
Director, Computing Section Computed date Syuichi Nakano 1996 Oct. 31