OAA computing section circular NK 1365 P/2005 SB216 (LONEOS)
The following improved orbital elements, by S. Nakano, are from 53 observations 2005 Sept. 23 to 2006 Sept. 10. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.63 arc second. Epoch = 2007 Mar. 1.0 TT T = 2007 Feb. 11.38397 +/- 0.00657 (m.e.) TT Peri. = 83.57626 +/- 0.00101 Node = 1.69893 +/- 0.00012 (2000.0) Inc. = 24.09811 +/- 0.00007 q = 3.8183799 +/- 0.0000200 AU e = 0.4633075 +/- 0.0000277 a = 7.1146517 +/- 0.0000518 AU n' = 0.05193661 +/- 0.00000057 P = 18.977 +/- 0.0002074 years (+/- 0.08 day) The predicted orbit for the 2026 return is as follows: T = 2026 Jan. 13.99215 TT Epoch = 2025 Dec. 31.0 TT Peri. = 83.23107 e = 0.4673294 Node = 1.08082 (2000.0) a = 7.1770175 AU Inc. = 24.10765 n'= 0.05126112 q = 3.8229865 AU P = 19.227 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2005/ 051102 704 1.1- 0.9+ 060725 585 0.7- 0.2+ 050923 691 0.7- 0.4- 051102 704 0.3+ 0.1+ 060725 585 0.1+ 0.3+ 050923 691 0.0 0.2- 051106 704 0.1+ 0.9- 060725 585 0.4+ 0.3- 050923 691 0.1+ 0.1- 051106 704 0.1+ 0.2- 060725 585 0.2+ 0.1- 050930 699 0.3- 0.8- 051106 704 0.4- 0.9- 060815 147 0.9+ 0.1- 050930 699 0.2+ 1.0+ 051106 704 0.7+ 1.8- 060815 147 0.3- 0.5- 050930 699 0.4- 1.6+ 051207 147 0.1- 1.1- 060901 215 0.1+ 0.1- 050930 699 0.3+ 1.1- 051229 147 0.5+ 0.5- 060901 215 0.2+ 0.1- 051003 704 0.6+ 1.2+ 2006/ 060901 215 0.4+ 0.1- 051003 704 1.0- 0.8- 060204 204 0.1- 0.6- 060901 130 1.1- 0.2+ 051003 704 0.8- 0.1- 060204 204 0.1+ 0.6+ 060901 130 0.1- 0.1+ 051003 704 0.5+ 0.9+ 060207 568 0.3- 0.0 060901 130 0.1- 0.2+ 051030 704 0.3+ 0.7+ 060207 568 0.3- 0.0 060901 130 0.3- 0.6- 051030 704 1.9+ 0.6+ 060301 147 (2.2+ 0.6+) 060902 561 0.1- 0.1- 051030 704 1.0+ 0.5+ 060301 147 1.8+ 0.8+ 060902 561 0.1+ 0.1- 051030 704 0.2+ 0.2- 060301 147 1.1+ 1.3+ 060903 157 0.4+ 0.5+ 051030 704 0.2- 0.3+ 060306 147 (2.2+ 0.7-) 060903 157 0.3- 0.1+ 051102 704 0.1+ 0.1- 060306 147 0.6+ 0.6- 060910 204 0.3+ 0.2- 051102 704 0.3- 0.3- 060725 585 0.3- 0.5+ 060910 204 0.3+ 0.2- ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 2006 Sept. 25