Nakano Note (Nakano wa Kangaeru noda) NK 1983 P/2009 SK280 (Spacewatch-Hill)
The following improved orbital elements, by S. Nakano, are from 69 observations 2009 Sept. 17 to Dec. 14. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.49 arc second. Epoch = 2009 June 18.0 TT T = 2009 May 24.53178 +/- 0.50700 (m.e.) TT Peri. = 328.29507 +/- 0.06072 Node = 36.41408 +/- 0.00104 (2000.0) Inc. = 16.80353 +/- 0.00134 q = 4.1990526 +/- 0.0001326 AU e = 0.1209286 +/- 0.0000259 a = 4.7766910 +/- 0.0000432 AU n' = 0.09440899 +/- 0.00000128 P = 10.440 +/- 0.0001416 years (+/- 0.05 day) The predicted orbit for the 2019 return is as follows: T = 2019 Oct. 23.49883 TT Epoch = 2019 Oct. 4.0 TT Peri. = 327.91667 e = 0.1198295 Node = 36.41901 (2000.0) a = 4.7815193 AU Inc. = 16.79813 n'= 0.09426603 q = 4.2085523 AU P = 10.456 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2009/ 091016 G96 0.6- 0.2- 091025 130 0.8+ 0.2- 090917 691 0.6+ 0.0 091016 G96 0.1- 0.1+ 091109 204 0.3- 0.2+ 090917 691 0.3+ 0.2+ 091016 G96 0.6+ 0.4+ 091109 204 0.3- 0.2- 090917 691 0.5+ 0.1- 091016 H01 0.3+ 0.5+ 091111 A77 1.1- 1.6- 090925 691 1.2- 0.7- 091016 H01 0.4+ 0.5+ 091111 A77 0.2+ 0.4+ 090925 691 0.1+ 0.2+ 091016 H01 0.4+ 0.6+ 091116 G96 0.0 0.2- 090925 691 0.1+ 0.3+ 091016 H01 0.4+ 0.5+ 091116 G96 0.4+ 0.0 090929 691 0.1- 0.1- 091016 926 0.5+ 0.6+ 091116 G96 0.2- 0.4- 090929 691 1.3- 0.6- 091016 926 0.1+ 0.4- 091116 G96 0.3- 0.0 090929 691 0.0 0.2+ 091016 H10 0.2- 0.1+ 091118 215 1.5+ 1.3+ 091015 G96 0.0 0.0 091016 H10 0.4+ 0.2+ 091121 349 0.5+ 0.0 091015 G96 0.2- 0.7- 091017 204 0.3+ 0.4- 091121 349 1.3+ 0.6+ 091015 G96 0.0 0.4- 091018 204 0.1- 0.3+ 091126 G96 0.0 0.2- 091015 G96 0.2- 0.1- 091019 B01 0.4- 0.0 091126 G96 1.0- 0.2- 091015 G96 0.0 0.3+ 091019 B01 1.2+ 0.6- 091126 G96 0.6- 0.3- 091015 G96 0.0 0.0 091019 B01 0.3+ 0.7+ 091126 G96 0.0 0.2+ 091015 G96 0.1+ 0.2+ 091019 H06 0.5- 0.0 091126 G96 0.2- 0.3+ 091015 G96 0.2- 0.3+ 091019 H06 0.0 0.7- 091210 A77 1.2- 0.0 091015 B86 0.1- 0.1- 091019 215 0.2+ 0.6- 091210 A77 0.0 0.3- 091015 B86 0.5- 0.4+ 091024 G96 0.5- 0.2- 091211 A77 (0.3+ 2.4-) 091016 291 0.1- 0.2+ 091024 G96 0.3- 0.0 091214 A77 0.6+ 0.3+ 091016 291 0.6- 0.3+ 091024 G96 0.6- 0.8- 091214 A77 0.0 0.3+ 091016 G96 0.7+ 0.3+ 091024 G96 0.1+ 0.4- 091214 A77 0.3+ 0.1- 091016 291 0.3- 0.7+ 091025 130 0.1+ 0.5- ( ) -------- Rejected Obs.
Associate of Central Bureau for Astronomical Telegrams Syuichi Nakano 2010 Oct. 11