Nakano Note (Nakano wa Kangaeru noda) NK 4337 P/2019 A5 (PANSTARRS)
The following improved orbital elements, by T. Kobayashi, are from 61 observations 2019 Jan. 4 to 2020 June 17. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.26 arc second. See the previous orbits in NK 3845, NK 4012 (= HICQ 2020) and NK 4036. Epoch = 2019 June 6.0 TT T = 2019 June 9.49291 +/- 0.00812 (m.e.) TT Peri. = 356.04346 +/- 0.00064 Node = 146.61933 +/- 0.00001 (2000.0) Inc. = 67.53628 +/- 0.00004 q = 6.3241651 +/- 0.0000097 AU e = 0.7079347 +/- 0.0000092 a = 21.6532543 +/- 0.0006842 AU n' = 0.00978181 +/- 0.00000046 P = 100.759 +/- 0.0047778 years (+/- 1.75 days) The predicted orbit for the 2119 return by S. Nakano from the above orbit is as follows: T = 2119 June 12.15900 TT Epoch = 2119 June 2.0 TT Peri. = 355.79281 e = 0.7095356 Node = 146.49379 (2000.0) a = 21.8003588 AU Inc. = 67.49467 n'= 0.00968297 q = 6.3322284 AU P = 101.788 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2019/ 190117 I52 0.1+ 0.0 190404 F51 0.0 0.1+ 190104 F51 0.4- 0.2+ 190117 I52 0.4- 0.7- 190404 F51 0.1- 0.1+ 190104 F51 0.2+ 0.1- 190205 461 0.2- 0.0 190404 F51 0.2+ 0.1+ 190104 F51 0.2+ 0.0 190205 461 0.3- 0.1+ 190506 N50 0.0 0.2- 190104 F51 0.1+ 0.1+ 190205 461 0.1+ 0.2+ 190506 N50 0.1+ 0.1+ 190113 F51 0.0 0.1- 190212 G96 0.2+ 0.5- 191203 568 0.3+ 0.3+ 190113 F51 0.1- 0.1- 190212 G96 0.2+ 0.4- 191203 568 0.3+ 0.2+ 190113 F51 0.0 0.2+ 190212 G96 0.3- 0.1- 2020/ 190113 F51 0.0 0.0 190212 G96 0.1+ 0.6- 200202 G96 0.1- 0.2- 190114 568 0.0 0.1+ 190228 G96 0.5- 0.0 200202 G96 0.2- 0.2- 190114 568 0.0 0.1+ 190228 G96 0.0 0.6- 200202 G96 0.0 0.0 190114 568 0.1+ 0.1+ 190228 G96 0.0 0.5- 200202 G96 0.5+ 0.3+ 190115 568 0.1+ 0.1+ 190228 G96 0.5- 0.1+ 200202 G96 0.6- 0.2- 190115 568 0.0 0.1+ 190309 568 0.0 0.2+ 200202 G96 0.7- 0.2- 190115 568 0.0 0.1+ 190309 568 0.0 0.2+ 200202 G96 0.5- 0.9- 190116 Q62 0.0 0.4+ 190309 568 0.0 0.2+ 200202 G96 0.4+ 0.1- 190116 Q62 0.2+ 0.2- 190328 F51 0.3+ 0.3+ 200520 568 0.2+ 0.2+ 190117 691 0.2+ 0.4- 190328 F51 0.1+ 0.4+ 200520 568 0.2+ 0.2+ 190117 691 0.3+ 0.2+ 190328 F51 0.1+ 0.3+ 200520 568 0.1+ 0.2+ 190117 691 0.2+ 0.1+ 190404 568 0.0 0.2+ 200617 568 0.1+ 0.3+ 190117 I52 0.2+ 0.4+ 190404 568 0.0 0.2+ 200617 568 0.2+ 0.0 ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2020 Dec. 23