Nakano Note (Nakano wa Kangaeru noda) NK 4165 P/2017 Y3 (Leonard)
The following improved orbital elements, by S. Nakano, are from 87 observations 2017 Dec. 26 to 2018 Sept. 11. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.59 arc second. See the previous orbit in NK 3594. Epoch = 2018 Feb. 11.0 TT T = 2018 Feb. 11.26004 +/- 0.00015 (m.e.) TT Peri. = 67.52875 +/- 0.00016 Node = 153.87400 +/- 0.00006 (2000.0) Inc. = 27.58569 +/- 0.00004 q = 1.2753798 +/- 0.0000020 AU e = 0.8707016 +/- 0.0000082 a = 9.8638463 +/- 0.0006276 AU n' = 0.03181520 +/- 0.00000304 P = 30.979 +/- 0.0029558 years (+/- 1.08 days) The predicted orbit for the 2048 return is as follows: T = 2048 Sept.25.46174 TT Epoch = 2048 Oct. 11.0 TT Peri. = 67.43676 e = 0.8709809 Node = 153.76192 (2000.0) a = 9.8198332 AU Inc. = 27.61546 n'= 0.03202933 q = 1.2669459 AU P = 30.772 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2017/ 171230 926 0.4+ 0.3- 180119 H06 0.4- 0.2- 171226 G96 0.1- 0.3- 171230 926 0.7+ 0.9- 180119 H06 0.8- 0.1+ 171226 G96 0.5- 0.1- 171231 926 0.0 0.1- 180120 Q11 0.8- 0.2+ 171226 G96 0.3+ 0.2- 171231 926 0.7- 0.0 180120 Q11 1.0- 0.4+ 171226 G96 0.0 0.4- 171231 926 0.3+ 0.3- 180217 349 0.0 0.1- 171226 G96 0.8+ 0.2- 2018/ 180217 349 0.5+ 0.1+ 171226 G96 0.2- 0.6- 180105 G96 0.1- 0.0 180218 Q11 1.2- 1.0+ 171226 G96 0.5+ 0.2- 180105 G96 0.3- 0.2- 180218 Q11 1.3- 1.2+ 171226 G96 0.7+ 0.1- 180105 G96 0.0 0.2- 180317 Q11 0.1- 0.2+ 171227 G40 0.1+ 0.9- 180105 G96 0.8- 0.1+ 180317 Q11 0.4- 0.1- 171227 G40 0.6+ 0.3- 180105 926 0.2+ 0.8+ 180324 Q11 1.2- 0.7+ 171228 G96 1.0- 0.3+ 180105 926 0.5- 0.3- 180324 Q11 0.8- 0.4+ 171228 G96 0.3+ 0.3+ 180105 926 0.5- 0.7- 180328 Q62 1.7+ 0.5- 171228 G96 (3.5+ 0.1+) 180106 G96 0.4- 0.3- 180328 Q62 1.6+ 0.7- 171228 926 0.0 0.5+ 180106 G96 0.2+ 0.2- 180408 215 1.6+ 1.9- 171228 926 0.4- 0.3- 180106 G96 0.8- 0.2- 180408 215 (2.4+ 0.9-) 171228 926 0.2- 0.1+ 180109 585 0.3+ 0.2+ 180408 215 (2.3+ 0.7-) 171229 G96 1.4+ 0.4- 180109 585 0.2+ 0.2+ 180414 A71 0.6+ 0.0 171229 H06 0.6- 0.4- 180109 585 0.7+ 0.2+ 180414 A71 0.6+ 0.2+ 171229 G96 1.8+ 1.1- 180109 585 0.2- 0.5+ 180414 A71 0.8+ 0.1- 171229 H06 0.5- 0.4- 180109 585 0.4+ 0.6+ 180422 Q11 0.5- 0.4+ 171229 G96 (2.6+ 0.4-) 180109 585 0.6+ 0.8+ 180422 Q11 0.1- 0.2+ 171229 H06 0.3- 0.2- 180109 585 0.6+ 0.7+ 180524 349 0.6- 0.0 171229 I52 0.3+ 0.6- 180111 G40 0.5+ 0.1- 180524 349 0.2+ 0.6+ 171229 I52 0.8- 0.3- 180111 G40 0.8+ 0.0 180818 F51 0.5+ 0.3- 171229 I52 0.1- 0.1- 180111 G40 0.9+ 0.0 180818 F51 0.2- 0.1- 171229 I52 0.4- 0.5- 180112 D95 0.5- 1.2+ 180818 F51 0.3- 0.0 171229 926 0.7+ 0.3+ 180112 D95 0.1+ 1.0+ 180830 W84 0.0 0.2+ 171229 926 0.1- 0.4+ 180115 Q11 0.1- 0.2+ 180830 W84 0.0 0.0 171229 926 0.0 0.2- 180115 Q11 0.6- 0.2+ 180911 W84 1.1- 1.0+ 171230 926 0.4+ 0.2- 180119 H06 0.8- 0.3- 180911 W84 0.3+ 0.9+ ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2020 Aug. 10