OAA computing section circular NK 3473 P/Lemmon (2011 VJ5 = 2017 W1)
The following improved orbital elements, by S. Nakano, are from 65 observations 2011 to 2017. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.51 arc second. Residuals from the prediction in NK 2255 (= HICQ 2017) were -0.82 deg for Right Ascension and -0.14 deg for Declination with the delta-T correction = +1.03 day. See the previous orbits in NK 2208, NK 2219 and NK 2255. Epoch = 2018 Mar. 23.0 TT T = 2018 Mar. 22.92390 +/- 0.00074 (m.e.) TT Peri. = 315.28150 +/- 0.00025 Node = 169.91710 +/- 0.00013 (2000.0) Inc. = 3.97539 +/- 0.00001 q = 1.5078671 +/- 0.0000017 AU e = 0.5570642 +/- 0.0000004 a = 3.4042564 +/- 0.0000051 AU n' = 0.15691725 +/- 0.00000035 P = 6.281 +/- 0.0000140 years T = 2011 Dec. 8.70247 TT Epoch = 2011 Dec. 25.0 TT Peri. = 315.12620 e = 0.5572803 Node = 169.99783 (2000.0) a = 3.4026002 AU Inc. = 3.97274 n'= 0.15703183 q = 1.5063982 AU P = 6.276 years The predicted orbit for the 2024 return is as follows: T = 2024 Nov. 13.20316 TT Epoch = 2024 Nov. 26.0 TT Peri. = 340.75120 e = 0.5185545 Node = 146.75746 (2000.0) a = 3.5743884 AU Inc. = 5.39416 n'= 0.14584833 q = 1.7208731 AU P = 6.758 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2011/ 120202 807 0.2+ 0.2- 120321 703 (4.1- 0.2-) 111103 G96 0.3+ 0.0 120202 807 0.3+ 0.3- 120321 703 (3.3- 0.1-) 111103 G96 0.7+ 0.0 120202 807 0.5+ 0.3- 120321 703 (2.7- 1.0-) 111103 G96 0.0 0.1+ 120202 G96 0.6- 0.0 120325 704 1.1- 1.2+ 111103 G96 0.1- 0.3- 120202 G96 0.7- 0.7+ 120325 704 0.3- 0.6+ 111104 H36 (2.2+ 0.5-) 120202 G96 0.8- 0.4+ 120325 704 (1.7- 2.3+) 111104 H36 1.0- 0.0 120202 G96 1.6- 0.4+ 120330 G96 (3.0- 0.3+) 111104 H36 0.0 1.1+ 120202 703 0.4+ 0.8- 120330 G96 (2.7- 0.0 ) 111105 B18 0.2- 0.9- 120202 703 0.3- 1.0- 120330 G96 1.9- 0.3+ 111105 B18 0.6+ 0.1- 120202 703 (2.3- 0.5-) 120330 G96 (2.2- 0.2+) 111105 B18 0.0 0.4- 120203 H06 0.2- 0.6+ 2017/ 111105 B18 0.2+ 0.6- 120203 H06 1.5- 1.1+ 171027 F51 0.2- 0.0 2012/ 120203 H06 (2.3- 1.2+) 171027 F51 0.0 0.2+ 120201 703 (2.5- 0.4+) 120203 H06 (2.2- 1.0+) 171027 F51 0.2- 0.1- 120201 703 0.4- 0.3- 120204 215 0.8- 0.6+ 171027 F51 0.0 0.2+ 120201 703 1.2- 0.4+ 120204 215 0.4- 0.3+ 171116 G96 0.2+ 0.0 120201 703 (2.5- 0.4-) 120204 215 0.1- 0.0 171116 G96 0.0 0.2- 120201 703 (2.8- 0.6-) 120219 691 (3.3- 0.9+) 171116 G96 0.0 0.2+ 120201 703 1.0- 0.4- 120219 691 (4.1- 1.9+) 171116 G96 0.2- 0.0 120201 703 1.3- 0.6+ 120219 691 (4.5- 1.2+) 171118 F51 0.1+ 0.1- 120201 703 0.0 0.1- 120219 349 (2.8- 1.0+) 171118 F51 0.1+ 0.1- 120201 G96 0.4+ 0.1+ 120219 349 (3.3- 0.4+) 171118 F51 0.1+ 0.1+ 120201 G96 0.1+ 0.3- 120222 H06 0.4+ 0.3- 171119 J04 0.1+ 0.3- 120201 G96 0.2+ 0.2- 120222 H06 0.1- 0.1- 171119 J04 0.2+ 0.1- 120201 G96 0.0 0.1+ 120227 A71 0.4- 0.0 171119 J04 0.5+ 0.0 120201 F65 0.7+ 0.2- 120227 A71 0.1+ 0.4- 171119 Z84 0.1- 0.2+ 120201 F65 0.7+ 0.2- 120228 F51 0.3+ 0.0 171119 Z84 0.1- 0.1+ 120201 F65 0.9+ 0.2- 120228 F51 0.3+ 0.0 171119 Z84 0.1+ 0.2+ 120202 807 0.5+ 0.1- 120228 F51 0.3+ 0.0 120202 807 0.2+ 0.3- 120321 703 (4.3- 1.0+) ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 2017 Nov. 25