Nakano Note (Nakano wa Kangaeru noda) NK 5097 P/2019 A4 (PANSTARRS)
The following improved orbital elements, by S. Nakano, are from 75 observations 2018 Dec. 9 to 2019 Mar. 2. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.62 arc second. See the previous orbit in NK 4287. Epoch = 2018 Nov. 18.0 TT T = 2018 Dec. 5.23974 +/- 0.09099 (m.e.) TT Peri. = 341.83900 +/- 0.02535 Node = 119.30111 +/- 0.00042 (2000.0) Inc. = 13.31713 +/- 0.00103 q = 2.3791894 +/- 0.0000773 AU e = 0.0896430 +/- 0.0000143 a = 2.6134686 +/- 0.0000943 AU n' = 0.23328034 +/- 0.00001263 P = 4.225 +/- 0.0002288 years (+/- 0.08 day) The predicted orbit for the 2023 return is as follows: T = 2023 Mar. 3.33177 TT Epoch = 2023 Feb. 25.0 TT Peri. = 343.06302 e = 0.0870974 Node = 119.24387 (2000.0) a = 2.6132580 AU Inc. = 13.30429 n'= 0.23330854 q = 2.3856501 AU P = 4.224 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2018/ 190111 L01 1.1- 0.1+ 190116 K38 0.9- 0.4+ 181209 W84 0.5+ 0.1- 190111 L01 0.1- 0.3- 190117 G96 1.8- 1.4+ 181209 I41 0.3- 0.2- 190111 L27 1.2- 1.0+ 190117 G96 0.5- 0.4+ 181209 I41 0.1- 0.6+ 190111 G40 1.2- 0.4+ 190117 G96 0.1- 0.3- 181210 W84 0.0 0.1+ 190111 L27 1.5- 0.5+ 190117 G96 0.5- 0.0 181219 I41 0.3- 0.1- 190112 G40 1.2- 0.8+ 190117 I52 0.8- 0.6- 181222 I41 0.8- 0.5- 190112 L27 1.4- 0.3+ 190117 I52 0.3+ 0.9+ 181228 I41 0.7- 0.4+ 190112 691 1.3- 0.5+ 190117 I52 0.4- 0.3- 181229 I41 0.3- 0.0 190112 691 0.8- 0.2+ 190117 I52 0.6+ 0.4- 181231 G96 1.0- 0.4+ 190112 691 1.1- 0.5+ 190122 I41 0.6+ 0.1- 181231 G96 0.5- 0.3+ 190112 I52 0.3- 0.3- 190125 I41 0.8+ 0.6- 181231 G96 0.6- 0.4+ 190112 I52 1.0- 0.2- 190126 G96 0.1+ 0.1+ 181231 G96 1.0- 0.1+ 190112 I52 1.5- 0.2+ 190126 G96 0.5- 0.5- 2019/ 190112 I52 1.2- 0.5+ 190126 G96 0.1- 0.5- 190103 F51 0.5+ 0.1- 190112 Q62 0.4- 0.1- 190126 G96 0.4- 0.3- 190103 F51 0.2+ 0.1- 190112 Q62 0.0 0.3+ 190129 A71 0.1+ 0.0 190103 F51 0.1+ 0.1- 190115 658 1.0- 0.2+ 190129 A71 0.7- 0.1- 190110 F51 0.3+ 0.1- 190115 658 0.9- 0.2+ 190129 A71 0.4+ 0.1+ 190110 F51 0.0 0.1+ 190115 658 0.8- 0.2+ 190205 461 1.2+ 0.1+ 190110 F51 0.3+ 0.0 190115 658 0.8- 0.3+ 190205 461 0.1+ 0.4+ 190111 691 0.6- 0.3+ 190115 I52 0.3+ 0.1- 190205 461 0.9+ 0.1- 190111 691 0.3- 0.3+ 190115 I52 1.0- 0.5+ 190208 G96 0.9+ 0.9- 190111 568 0.5+ 0.1- 190115 I52 0.3- 0.4- 190208 G96 0.6+ 0.8- 190111 568 0.5+ 0.1- 190115 I52 0.1+ 0.2+ 190302 304 0.3- 0.6+ 190111 691 1.6- 0.2+ 190116 K38 1.2- 0.7- 190302 304 0.3- 0.7+ 190111 568 0.5+ 0.1- 190116 K38 0.5- 1.1- ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2023 Nov. 29