OAA computing section circular NK 650 P/1986 W1 (Lovas 2)
The following improved orbital elements, by S. Nakano, are from 27 observations 1986 Dec. 2-1987 Mar. 3. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.93 arc second. Epoch = 1986 Sept. 7.0 TT T = 1986 Sept. 2.19258 +/- 0.06849 (m.e.) TT Peri. = 71.32546 +/- 0.08740 Node = 283.76562 +/- 0.01824 (2000.0) Inc. = 1.52875 +/- 0.00074 q = 1.4578700 +/- 0.0010042 AU e = 0.5922943 +/- 0.0004851 a = 3.5757902 +/- 0.0013748 AU n' = 0.14576257 +/- 0.00008406 P = 6.762 +/- 0.0038995 years (+/- 1.42 day) The predicted orbit for the 2000 return is as follows: T = 2000 Mar. 11.67686 TT Epoch = 2000 Feb. 26.0 TT Peri. = 71.53872 e = 0.5928445 Node = 283.57623 (2000.0) a = 3.5707252 AU Inc. = 1.52910 n'= 0.14607283 q = 1.4538405 AU P = 6.747 years The following residuals in seconds of arc are from the above orbital elements: 19/ 19/ 19/ 861130 561(13.0- 6.8+) 861204 688 (5.6+ 3.6+) 870103 691 (3.5+ 1.2-) 861130 561 (5.7- 3.3+) 861204 688 1.5+ 0.1+ 870103 691 0.2+ 0.9+ 861202 801 (3.4- 10.3+) 861204 691 0.4- 1.5+ 870103 691 0.4+ 0.8- 861202 691 0.3- 0.6+ 861204 691 1.3- 1.2+ 870125 691 0.1+ 0.6- 861202 691 0.0 0.9+ 861204 691 0.4+ 0.7+ 870125 691 0.1+ 1.5+ 861202 691 0.3- 0.1- 861204 892 (0.9+ 2.7-) 870125 691 0.0 0.3- 861202 892(12.0- 6.5-) 861204 892 (2.5+ 0.6+) 870130 691 0.2+ 0.0 861202 892(12.0- 4.5-) 861204 372(11.8+ 2.0+) 870130 691 0.2- 0.3- 861203 372 1.1+ 1.6- 861205 801 0.4+ 2.1- 870130 691 0.8- 0.5- 861203 323 0.0 0.0 861205 373 (2.0- 2.7+) 870301 691 0.2- 0.4- 861203 372 0.1- 0.3- 861205 373 (3.2- 2.2-) 870301 691 0.1- 1.4+ 861203 561 (8.2- 8.1+) 861205 399 1.8- 1.9- 870303 691 0.3+ 1.2- 861204 688 0.1+ 1.9- 861206 399 1.6+ 0.9+ 870303 691 0.3+ 0.3+ 861204 688 (4.2+ 5.7-) 861207 372 1.1- 2.0+ ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 1997 May 2