Nakano Note (Nakano wa Kangaeru noda) NK 3995 P/2019 W1 (PANSTARRS)
The following improved orbital elements, by S. Nakano, are from 71 observations 2018 Aug. 8 to 2019 Dec. 20. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.54 arc second. See CBET 4707. Epoch = 2019 Apr. 27.0 TT T = 2019 May 8.09212 +/- 0.00364 (m.e.) TT Peri. = 18.76387 +/- 0.00059 Node = 35.42842 +/- 0.00004 (2000.0) Inc. = 23.46359 +/- 0.00002 q = 3.3399177 +/- 0.0000038 AU e = 0.2659157 +/- 0.0000057 a = 4.5497739 +/- 0.0000358 AU n' = 0.10155922 +/- 0.00000120 P = 9.705 +/- 0.0001147 years (+/- 0.04 day) The predicted orbit for the 2029 return is as follows: T = 2029 Jan. 22.81935 TT Epoch = 2029 Jan. 24.0 TT Peri. = 18.88841 e = 0.2662901 Node = 35.30932 (2000.0) a = 4.5471946 AU Inc. = 23.46620 n'= 0.10164564 q = 3.3363219 AU P = 9.697 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2018/ 191130 157 0.9- 0.1- 191204 C10 1.4- 0.1- 180808 F51 0.1+ 0.4- 191130 L01 0.8- 0.3- 191204 C10 0.6- 0.3- 180808 F51 0.1+ 0.3+ 191130 L01 0.1+ 0.2- 191204 C10 1.4- 1.0- 180808 F51 0.2- 0.1+ 191130 157 1.1- 0.2- 191204 H36 1.1- 0.4- 180808 F51 0.1+ 0.1+ 191201 C47 0.4- 0.2- 191204 H36 0.3+ 0.6+ 180821 F51 0.4+ 0.1- 191201 C47 0.5- 0.1- 191204 H36 1.8- 0.3+ 180821 F51 0.4- 0.2- 191201 C47 0.3- 0.0 191204 K51 0.5- 0.3- 2019/ 191201 970 0.1+ 0.4+ 191204 K51 0.0 0.3+ 190101 F51 0.2- 0.0 191202 970 0.2- 0.2+ 191204 K88 0.8- 0.6- 190101 F51 0.1- 0.1- 191202 J95 (2.0- 0.9-) 191204 K88 0.9- 0.3- 190101 F51 0.0 0.0 191202 J95 1.2- 0.7- 191205 850 0.8- 0.6- 190101 F51 0.5+ 0.2+ 191202 J95 1.5- 0.8- 191205 850 0.2+ 0.3+ 190124 F51 0.1- 0.0 191202 K88 0.2- 0.5- 191205 T12 0.5+ 0.1+ 190124 F51 0.3- 0.3+ 191202 K88 0.8- 0.4- 191207 I52 0.5+ 0.0 190124 F51 0.1+ 0.2- 191202 K88 1.1- 0.3- 191207 I52 0.1+ 0.0 191129 F52 0.1+ 0.4- 191202 K63 0.8- 0.5+ 191207 I52 0.2+ 0.2- 191129 F52 0.1- 0.0 191202 K63 1.0- 0.5+ 191218 H06 0.6+ 0.4- 191129 F52 0.1+ 0.3+ 191202 K63 1.2- 0.1+ 191218 H06 1.1+ 0.7- 191129 F52 0.6- 0.1+ 191203 T12 0.7+ 0.2+ 191218 H36 1.0+ 0.4+ 191130 K88 0.5- 0.0 191203 568 0.5+ 0.1+ 191218 H36 0.1- 0.2+ 191130 K88 0.0 0.5- 191203 568 0.3+ 0.1+ 191218 H36 0.3+ 0.0 191130 L01 0.5- 1.1- 191203 568 0.2+ 0.0 191220 711 0.3+ 1.0+ 191130 L01 0.5- 0.4- 191203 K88 0.1- 0.2- 191220 711 0.2+ 0.6+ 191130 L01 0.0 0.9- 191203 K88 0.5- 0.1- 191220 711 0.6+ 1.0+ 191130 L01 0.1- 0.1- 191204 K88 0.2- 0.1+ ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2019 Dec. 21