Nakano Note (Nakano wa Kangaeru noda) NK 2309 233P/La Sagra
The following improved orbital elements, by T. Kobayashi, are from 61 observations 2005 to 2010. Perturbations by Mercury to Pluto were taken into account. The mean residual is +/- 0.70 arc second. See the previous orbit in NK 1881. Epoch = 2010 Mar. 25.0 TT T = 2010 Mar. 12.40745 +/- 0.00103 (m.e.) TT Peri. = 27.13364 +/- 0.00029 Node = 74.99747 +/- 0.00011 (2000.0) Inc. = 11.27479 +/- 0.00004 q = 1.7914277 +/- 0.0000038 AU e = 0.4096314 +/- 0.0000011 a = 3.0344225 +/- 0.0000084 AU n' = 0.18646185 +/- 0.00000077 P = 5.286 +/- 0.0000221 years T = 2004 Nov. 15.93681 TT Epoch = 2004 Nov. 11.0 TT Peri. = 26.71081 e = 0.4009263 Node = 75.21037 (2000.0) a = 3.0512332 AU Inc. = 11.25787 n'= 0.18492302 q = 1.8279137 AU P = 5.330 years The predicted orbit for the 2015 return is as follows: T = 2015 June 25.43837 TT Epoch = 2015 June 27.0 TT Peri. = 27.24760 e = 0.4107649 Node = 74.96814 (2000.0) a = 3.0319473 AU Inc. = 11.27857 n'= 0.18669024 q = 1.7865296 AU P = 5.279 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2005/ 091121 703 0.7- 0.2+ 100206 C51 1.2+ 0.4+ 050209 G96 0.1- 0.2+ 091121 703 0.7- 0.7+ 100207 C51 0.4+ 0.9+ 050209 G96 0.1+ 0.2+ 091121 703 0.7- 0.3+ 100207 C51 0.5+ 0.1- 050209 G96 0.3- 0.4+ 091121 703 0.5+ 0.7+ 100207 C51 1.3+ 0.0 050209 G96 0.0 0.4+ 091121 703 (0.8- 1.6+) 100207 C51 (2.0+ 0.0 ) 050508 704 0.0 0.7+ 091210 703 (2.3+ 1.0+) 100207 C51 0.4+ 0.6- 050508 704 (0.5- 2.0+) 091210 703 (2.3+ 0.5+) 100207 C51 0.4+ 0.0 050508 704 0.4- 0.7+ 091210 703 (1.8+ 0.8+) 100207 C51 0.6+ 0.6- 050510 704 1.0+ 1.1+ 091210 703 (2.2+ 1.4+) 100207 C51 0.3+ 0.9- 050510 704 0.6+ 0.8+ 2010/ 100207 C51 1.4+ 0.3+ 050510 704 1.2+ 1.2+ 100206 C51 0.7+ 0.1- 100213 291 1.2- 1.3- 050510 704 0.9+ 1.0+ 100206 C51 1.3+ 0.7+ 100213 291 0.6- 0.1+ 2009/ 100206 C51 0.3+ 1.0- 100213 291 0.2- 0.5- 091114 704 0.5- 0.6+ 100206 C51 1.1+ 0.7- 100215 H01 0.6- 0.2- 091114 704 0.5- 0.7+ 100206 C51 1.3+ 1.4+ 100215 H01 0.6- 0.2- 091114 704 (0.8+ 2.0+) 100206 C51 (1.8+ 0.2+) 100215 H01 0.5- 0.4- 091114 704 (1.3- 2.0+) 100206 C51 0.8+ 0.7- 100216 291 0.1- 0.3- 091119 704 (1.6- 1.2+) 100206 C51 0.2+ 0.9+ 100216 291 0.8- 0.0 091119 704 1.0- 0.7+ 100206 C51 0.4+ 0.4+ 100216 291 0.0 0.1- 091119 704 0.5+ 0.1+ 100206 C51 1.1+ 0.4- 100216 291 (2.0- 0.3+) 091119 704 (0.2- 2.0+) 100206 C51 1.3+ 0.9- 100216 291 0.3- 0.6- 091119 J75 0.8- 0.6+ 100206 C51 0.0 0.4- 100216 291 0.5- 0.2- 091119 J75 1.0- 0.3- 100206 C51 0.3+ 0.3- 100218 H01 0.5- 0.4- 091119 J75 0.0 0.3+ 100206 C51 0.9+ 0.6- 100218 H01 0.7- 0.4- 091121 703 1.3- 1.1+ 100206 C51 1.2+ 0.1- 100218 H01 0.5- 0.5- 091121 703 0.4- 0.0 100206 C51 0.4+ 0.3- ( ) -------- Rejected Obs.
Associate of Central Bureau for Astronomical Telegrams Syuichi Nakano 2012 July 29