OAA computing section circular NK 735 P/1999 XS87 (LINEAR)
The following improved orbital elements, by S. Nakano, are from 94 observations 1999 Oct. 13 to 2000 Mar. 5. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.62 arc second. Epoch = 1999 Aug. 10.0 TT T = 1999 Aug. 6.60989 +/- 0.00666 (m.e.) TT Peri. = 151.35144 +/- 0.00235 Node = 266.73100 +/- 0.00015 (2000.0) Inc. = 14.84415 +/- 0.00025 q = 2.7717812 +/- 0.0000422 AU e = 0.8410101 +/- 0.0000364 a = 17.4336980 +/- 0.0002294 AU n' = 0.01354004 +/- 0.00000027 P = 72.792 +/- 0.0014366 years (+/- 0.52 day) The predicted orbit for the 2070 return is as follows: T = 2070 Aug. 31.18412 TT Epoch = 2070 Sept. 6.0 TT Peri. = 152.12610 e = 0.8434285 Node = 265.28418 (2000.0) a = 17.7037882 AU Inc. = 14.66943 n'= 0.01323137 q = 2.7719089 AU P = 74.490 years The following residuals in seconds of arc are from the above orbital elements: 1999/ 000107 704 1.1+ 0.7- 000125 402 0.1+ 0.3- 991013 704 0.0 0.4+ 000107 704 0.4+ 0.3+ 000127 360 0.6- 1.0- 991013 704 0.2+ 0.7+ 000107 704 0.4+ 1.1+ 000127 360 0.2+ 0.6- 991013 704 0.4- 0.2- 000107 704 0.1+ 1.8- 000128 402 0.4- 0.2- 991013 704 0.3- 0.1- 000107 704 0.8+ 0.7- 000128 402 0.1+ 0.5+ 991013 704 0.6- 0.6- 000107 704 0.2- 0.1- 000128 402 0.3+ 0.3+ 991104 704 0.7- 0.9+ 000107 704 0.6- 0.0 000130 706 1.0- 0.5+ 991104 704 0.4- 0.6+ 000109 704 1.1+ 0.3+ 000130 706 0.8+ 1.1- 991104 704 0.4- 0.4+ 000109 704 0.5+ 0.4- 000202 704 (8.2- 2.4+) 991104 704 0.7+ 0.5+ 000109 704 0.1- 0.2+ 000202 704 (0.6- 2.0-) 991104 704 0.3+ 0.6- 000109 704 0.3+ 0.4+ 000202 704 (1.3+ 2.1-) 991105 704 0.2+ 0.1+ 000109 704 (2.3- 0.9+) 000203 402 0.6- 0.2+ 991105 704 0.0 0.5+ 000111 046 0.1+ 0.8+ 000203 402 1.0- 0.4- 991105 704 0.4+ 0.4+ 000111 046 0.6- 1.0+ 000203 402 0.1- 0.2+ 991207 704 0.4+ 0.3- 000111 046 0.8- 0.5+ 000204 360 0.4- 0.2- 991207 704 0.9+ 1.6- 000111 046 0.1- 0.5+ 000204 360 0.5- 0.1+ 991207 704 0.4+ 0.8- 000111 046 0.2- 0.4+ 000205 349 0.5+ 0.1- 991207 704 0.5- 1.4- 000111 046 0.6- 0.3+ 000205 349 0.2+ 0.2+ 991208 704 0.2- 0.4+ 000112 046 0.2- 0.4+ 000205 349 1.4+ 1.3+ 991208 704 0.7- 0.2+ 000112 046 0.0 0.5+ 000211 360 0.7- 0.3- 991208 704 0.4- 0.4- 000112 046 0.1+ 0.4+ 000211 360 0.8- 0.4- 991208 704 0.4- 0.6- 000112 046 0.3- 0.4+ 000229 360 0.0 0.1- 991208 704 0.6- 1.1- 000113 372 0.0 1.1+ 000229 360 0.2- 0.1- 2000/ 000113 372 0.5- 0.2+ 000301 402 0.4+ 0.6+ 000105 704 0.6- 0.2- 000115 402 0.6+ 0.1+ 000301 402 0.1- 0.3- 000105 704 0.1+ 0.0 000115 402 0.2+ 0.2+ 000301 402 0.6- 0.8- 000105 704 0.2+ 0.2- 000115 402 0.2+ 0.1+ 000302 118 0.8+ 1.1+ 000105 704 1.0+ 1.4- 000115 349 (2.3+ 2.1+) 000302 118 0.5+ 1.2+ 000106 704 0.4+ 0.3+ 000115 349 1.1+ 1.5+ 000305 704 1.7- 1.3- 000106 704 0.0 0.1- 000122 402 0.4+ 0.3- 000305 704 0.4- 0.2- 000106 704 1.0- 0.5- 000122 402 0.9- 0.6+ 000305 704 0.5+ 0.6+ 000107 704 1.6+ 0.2+ 000122 402 0.4+ 0.5+ 000305 704 0.0 0.6- 000107 704 1.2+ 0.0 000125 402 0.2- 0.4- 000305 704 0.1- 0.6- 000107 704 0.3- 0.7- 000125 402 0.3- 0.3- ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 2000 Nov. 3