Nakano Note (Nakano wa Kangaeru noda) NK 4012 P/2019 A5 (PANSTARRS)
The following improved orbital elements, by S. Nakano, are from 48 observations 2019 Jan. 4 to Dec. 3. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.24 arc second. Orbit depends upon one night observations on 2019 Dec. 3. See the previous orbit in NK 3845. Epoch = 2019 June 6.0 TT T = 2019 June 9.47845 +/- 0.00835 (m.e.) TT Peri. = 356.04238 +/- 0.00067 Node = 146.61935 +/- 0.00001 (2000.0) Inc. = 67.53622 +/- 0.00006 q = 6.3241542 +/- 0.0000053 AU e = 0.7079420 +/- 0.0000054 a = 21.6537586 +/- 0.0004007 AU n' = 0.00978147 +/- 0.00000027 P = 100.763 +/- 0.0027978 years (+/- 1.02 day) The predicted orbit for the 2119 return is as follows: T = 2119 June 13.41751 TT Epoch = 2119 June 2.0 TT Peri. = 355.79150 e = 0.7095439 Node = 146.49383 (2000.0) a = 21.8009986 AU Inc. = 67.49459 n'= 0.00968254 q = 6.3322327 AU P = 101.792 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 691 0.2+ 0.4- 190309 568 0.0 0.0 190104 F51 0.4- 0.2+ 190117 691 0.2+ 0.2+ 190309 568 0.0 0.1+ 190104 F51 0.1+ 0.1- 190117 691 0.1+ 0.0 190309 568 0.0 0.0 190104 F51 0.2+ 0.1- 190117 I52 0.1+ 0.4+ 190328 F51 0.2+ 0.2+ 190104 F51 0.0 0.0 190117 I52 0.1+ 0.1- 190328 F51 0.1+ 0.2+ 190113 F51 0.0 0.2- 190117 I52 0.5- 0.7- 190328 F51 0.0 0.1+ 190113 F51 0.0 0.1- 190205 461 0.3- 0.1- 190404 568 0.0 0.1+ 190113 F51 0.0 0.1+ 190205 461 0.4- 0.1+ 190404 568 0.0 0.1+ 190113 F51 0.1+ 0.1- 190205 461 0.0 0.1+ 190404 F51 0.0 0.0 190114 568 0.0 0.0 190212 G96 0.1+ 0.6- 190404 F51 0.2- 0.1- 190114 568 0.0 0.0 190212 G96 0.1+ 0.5- 190404 F51 0.2+ 0.1- 190114 568 0.0 0.1+ 190212 G96 0.4- 0.2- 190506 N50 0.1- 0.4- 190115 568 0.1+ 0.1+ 190212 G96 0.0 0.7- 190506 N50 0.0 0.1- 190115 568 0.0 0.1+ 190228 G96 0.6- 0.1- 191203 568 0.0 0.0 190115 568 0.0 0.1+ 190228 G96 0.1- 0.8- 191203 568 0.0 0.0 190116 Q62 0.1- 0.4+ 190228 G96 0.1- 0.6- 190116 Q62 0.1+ 0.3- 190228 G96 0.6- 0.0 ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2019 Dec. 30