Nakano Note (Nakano wa Kangaeru noda) NK 2280 P/Gibbs (2006 Y2 = 2012 K9)
The following improved orbital elements, by S. Nakano, are from 142 observations 2006 to 2012. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.66 arc second. The delta-T correction for the prediction in NK 1767 (= HICQ 2011/2012 = HICQ 2012) was +0.053 day with RunOff values -95" (R. A.) and -18" (Decl.) on 2012 May 16 observations. See the previous orbit in NK 1767 (= HICQ 2011/2012 = HICQ 2012). Epoch = 2012 June 2.0 TT T = 2012 May 20.86031 +/- 0.00013 (m.e.) TT Peri. = 34.48846 +/- 0.00013 Node = 105.87690 +/- 0.00009 (2000.0) Inc. = 11.53464 +/- 0.00002 q = 1.2633723 +/- 0.0000008 AU e = 0.5872472 +/- 0.0000002 a = 3.0608448 +/- 0.0000009 AU n' = 0.18405267 +/- 0.00000008 P = 5.355 +/- 0.0000023 years T = 2006 Dec. 28.75305 TT Epoch = 2006 Dec. 11.0 TT Peri. = 26.30134 e = 0.5869400 Node = 113.35392 (2000.0) a = 3.0291518 AU Inc. = 14.47103 n'= 0.18694873 q = 1.2512214 AU P = 5.272 years The predicted orbit for the 2017 return is as follows: T = 2017 Sept.29.85103 TT Epoch = 2017 Oct. 14.0 TT Peri. = 34.60326 e = 0.5874339 Node = 105.83040 (2000.0) a = 3.0608267 AU Inc. = 11.53131 n'= 0.18405430 q = 1.2627933 AU P = 5.355 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2006/ 061228 246 0.1- 0.1- 070221 704 0.5+ 0.2+ 061110 291 0.7+ 0.2- 061228 246 0.1- 1.6- 070221 703 0.3- 0.3- 061110 291 0.2+ 0.5- 061228 246 0.6+ 1.1- 070221 703 0.9- 0.5- 061110 291 0.2- 0.5- 061228 246 1.2+ 0.3+ 070221 704 0.6+ 0.1+ 061226 703 1.1- 0.5+ 061228 246 1.6+ 0.5- 070221 703 0.3+ 0.8+ 061226 703 0.1- 1.7- 061230 246 0.4- 0.5+ 070221 703 1.2- 0.1- 061226 703 (2.5- 0.6+) 061230 246 0.8- 0.7+ 070228 850 0.3+ 0.0 061226 703 1.6- 1.5+ 061230 246 (1.7- 2.1+) 070228 850 0.2- 0.5+ 061226 703 0.5+ 0.7- 061230 246 0.1+ 0.3+ 070228 850 0.9+ 0.0 061226 703 0.5+ 0.7- 061230 246 0.3- 1.3+ 070302 J95 0.5- 0.1+ 061226 703 1.3+ 0.4- 061230 246 0.5+ 1.0+ 070302 J95 0.9+ 0.1- 061226 703 0.3- 0.0 061230 246 0.3+ 0.7+ 070305 850 0.3+ 0.1- 061226 703 1.0- 0.3+ 061230 246 1.1- 0.4+ 070305 850 0.0 0.1+ 061227 246 0.2- 0.2+ 061230 213 1.7+ 0.1+ 070305 850 0.5+ 0.0 061227 246 1.0+ 0.2- 061230 213 (2.0+ 0.1-) 070306 850 0.7+ 0.5- 061227 246 0.8- 0.2+ 061230 213 (2.5+ 0.0 ) 070306 850 0.3+ 0.2+ 061227 246 0.8- 0.5- 061230 372 1.2+ 0.1+ 070306 850 0.1+ 0.5- 061227 246 0.2- 0.3+ 061231 673 0.5+ 0.3- 070313 703 1.7- 0.1- 061227 246 0.1+ 1.1+ 061231 673 0.5+ 0.2- 070313 703 (2.8- 0.7-) 061227 246 1.3+ 0.2- 061231 673 0.5+ 0.3- 070313 703 (2.3- 1.4-) 061227 473 0.0 0.2+ 061231 673 0.4+ 0.1- 070313 703 1.7- 0.6- 061227 473 0.0 0.3+ 061231 349 0.1- 0.6+ 070326 703 0.3- 0.1+ 061227 473 0.2- 0.3+ 061231 349 0.1+ 1.0+ 070326 703 0.6+ 0.1- 061227 461 0.3+ 0.3- 2007/ 070408 J95 0.7+ 0.4- 061227 118 0.0 0.1- 070108 J95 0.3+ 0.7- 070408 J95 0.8+ 0.2+ 061227 118 0.2- 0.0 070108 J95 0.3+ 0.1- 070411 215 0.6+ 0.0 061227 461 0.2+ 0.1- 070108 J95 0.2- 0.3- 070411 215 0.7+ 0.2- 061227 461 0.2- 0.3- 070108 J95 0.6- 0.2- 070411 215 0.5+ 0.3- 061227 461 0.2+ 0.3- 070113 349 1.0- 0.5+ 070417 703 1.6+ 1.6+ 061227 118 0.3- 0.0 070113 349 0.7- 0.8+ 070417 703 0.1- 0.4- 061227 854 0.0 0.2- 070114 J95 0.5+ 0.2+ 070417 703 0.9- 0.9+ 061227 854 0.1+ 0.9+ 070114 J95 0.1- 0.0 070417 703 0.5- 0.4- 061227 854 1.0- 0.4+ 070114 J95 0.3+ 0.1- 070424 703 0.4+ 0.5- 061227 703 0.9- 1.0- 070116 703 0.2+ 1.1- 070424 703 0.4- 0.8- 061227 703 (2.0- 0.2+) 070116 703 0.7+ 1.5- 070424 703 0.5- 0.4- 061227 703 0.5+ 0.9- 070116 703 (2.0+ 0.0 ) 070424 703 1.9- 1.0- 061227 703 0.6- 0.6- 070116 703 (3.7- 0.3+) 070511 703 0.7+ 0.3+ 061227 703 0.8- 1.0- 070129 703 1.8- 0.1+ 070511 703 0.2+ 0.2+ 061227 703 0.5- 0.4- 070129 703 0.5- 1.8+ 070511 703 0.8- 0.0 061227 703 0.2- 0.0 070129 703 0.4- 0.6- 2012/ 061227 703 0.6+ 0.5- 070129 703 (2.1- 0.3+) 120516 H06 1.1+ 0.5- 061227 703 0.5- 0.0 070204 J95 0.2+ 0.1+ 120516 H06 0.0 0.1+ 061227 703 0.8- 0.0 070204 J95 0.3+ 0.1+ 120516 H06 0.8- 0.1- 061227 703 0.0 0.3- 070204 J95 0.1+ 0.1+ 120517 H06 0.7+ 0.7- 061227 H36 0.5+ 0.3- 070205 118 0.5+ 0.2- 120517 H06 1.0+ 0.3- 061227 H36 1.1- 0.5- 070205 118 0.1+ 1.2- 120517 H06 1.4+ 0.3- 061227 H36 0.4- 1.2+ 070207 J95 0.5- 0.1+ 120613 H06 1.2- 1.2+ 061227 H36 0.1- 0.4+ 070207 J95 0.4- 0.3- 120613 H06 0.3- 1.3+ 061228 246 0.0 0.7+ 070207 J95 0.2+ 0.2+ 120614 H06 0.5- 0.2+ 061228 246 0.5+ 1.1+ 070221 704 1.0+ 0.3+ 120614 H06 1.2- 0.5- 061228 246 0.2- 1.0+ 070221 704 1.0+ 0.7+ 120614 H06 0.5+ 0.4+ 061228 246 0.5- 0.8+ 070221 704 0.6+ 0.5+ ( ) -------- Rejected Obs.
Associate of Central Bureau for Astronomical Telegrams Syuichi Nakano 2012 June 19