Nakano Note (Nakano wa Kangaeru noda) NK 4395 P/2020 X2 (ATLAS)
The following improved orbital elements, by S. Nakano, are from 142 observations 2020 Sept. 25 to 2021 Jan. 19. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.40 arc second. See an orbit in CBET 4896. Epoch = 2020 Nov. 7.0 TT T = 2020 Nov. 15.93345 +/- 0.03590 (m.e.) TT Peri. = 347.36492 +/- 0.00639 Node = 105.45861 +/- 0.00008 (2000.0) Inc. = 18.19193 +/- 0.00028 q = 3.8285024 +/- 0.0000353 AU e = 0.7661705 +/- 0.0000181 a = 16.3730500 +/- 0.0012763 AU n' = 0.01487681 +/- 0.00000174 P = 66.251 +/- 0.0077430 years (+/- 2.83 days) The predicted orbit for the 2087 return is as follows: T = 2087 Dec. 9.40452 TT Epoch = 2087 Dec. 26.0 TT Peri. = 347.67926 e = 0.7677060 Node = 105.16644 (2000.0) a = 16.5520725 AU Inc. = 18.10949 n'= 0.01463610 q = 3.8449471 AU P = 67.341 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2020/ 201212 C77 0.0 0.8- 201216 215 0.3+ 0.8- 200925 G96 0.1- 0.0 201212 J95 0.2- 0.1- 201216 215 0.3+ 1.3- 200925 G96 0.2- 0.0 201212 J95 0.1+ 0.4- 201217 Q11 0.2- 0.1- 201014 G96 0.1+ 0.0 201212 J95 0.1+ 0.0 201217 Q11 0.2- 0.0 201014 G96 0.3+ 0.1+ 201212 J95 0.4- 0.2+ 201217 Q11 0.4- 0.2- 201014 G96 0.4+ 0.0 201212 595 0.1+ 0.6- 201219 Q11 0.4+ 0.2- 201014 G96 0.0 0.1+ 201213 595 0.6- 0.1+ 201219 Q11 0.2+ 0.0 201017 I41 0.2+ 0.2+ 201213 204 0.3- 0.2+ 201219 Q11 0.3+ 0.1- 201017 I41 0.0 0.1+ 201213 204 0.1+ 0.0 201220 Z10 0.6+ 0.5- 201019 I41 0.0 0.2- 201213 I89 0.0 0.5- 201220 Z10 0.2+ 0.2+ 201019 I41 0.1- 0.0 201213 V01 0.6+ 0.3- 201220 Z10 0.1- 0.2- 201029 G96 0.1- 0.0 201213 I89 0.4+ 0.2+ 201222 T08 0.4- 0.0 201029 G96 0.0 0.0 201213 W88 0.1+ 0.3+ 201222 T08 0.8- 0.4+ 201029 G96 0.1- 0.0 201213 V01 0.7+ 0.1- 201222 T08 0.7+ 0.3- 201029 G96 0.3- 0.1- 201213 W88 0.3+ 0.2- 201222 T08 0.4- 0.3- 201123 G96 0.2- 0.1+ 201213 L39 0.5- 0.7- 201223 G96 0.2+ 0.1- 201123 G96 0.1- 0.0 201213 L39 0.5+ 0.8- 201223 G96 0.1- 0.1- 201123 G96 0.0 0.0 201213 L39 0.8- 0.5+ 201223 G96 0.0 0.0 201123 G96 0.1- 0.0 201213 204 0.2- 0.2+ 201223 G96 0.1+ 0.2- 201208 F52 0.6+ 0.1- 201213 204 0.2- 0.0 201226 G96 0.4+ 0.3- 201208 F52 0.6+ 0.0 201213 204 0.1+ 0.1+ 201226 G96 0.2+ 0.2- 201208 F52 0.4+ 0.2- 201214 L01 0.7+ 0.3+ 201226 G96 0.2+ 0.2- 201208 F52 0.4+ 0.2+ 201214 L01 0.9+ 0.2- 201226 G96 0.5+ 1.0+ 201210 T08 0.2- 0.0 201214 L01 1.0+ 0.0 201226 T08 0.7- 0.3- 201210 T08 0.5+ 0.1- 201214 L01 0.5+ 0.1- 201226 T08 0.9+ 0.3- 201210 T08 0.7+ 0.1+ 201214 A77 0.8- 0.5+ 201226 T08 1.1- 0.5+ 201210 T08 0.5- 0.3- 201214 104 0.0 0.1- 201226 T08 1.1- 0.0 201211 L01 0.5+ 0.3- 201214 104 0.4- 0.1+ 2021/ 201211 L01 0.6+ 0.5+ 201214 A77 0.9- 0.5+ 210103 T08 0.3- 0.2+ 201211 L01 0.1+ 0.2- 201214 104 0.1- 0.2+ 210103 T08 0.6+ 0.5+ 201211 B49 0.2+ 0.7+ 201214 A77 0.7- 0.6+ 210103 T08 0.3- 0.2+ 201211 B49 0.1- 0.7- 201214 I47 0.1- 0.5+ 210103 T08 0.0 0.4- 201212 H06 0.5+ 0.1+ 201214 I47 0.5- 0.3+ 210103 213 0.2+ 1.0+ 201212 H06 0.3+ 0.0 201214 T08 0.1- 0.0 210104 213 0.9+ 0.1+ 201212 E94 1.5- 0.1- 201214 T08 0.1- 0.1+ 210104 213 0.0 0.4- 201212 E94 1.0- 1.1+ 201214 T08 0.1- 0.4+ 210108 Q11 0.2+ 0.0 201212 E94 0.1- 0.5- 201214 T08 0.8- 0.7- 210108 Q11 0.1+ 0.1+ 201212 E94 0.4+ 0.3+ 201215 W88 0.0 0.4+ 210108 Q11 0.1+ 0.1+ 201212 T05 0.2+ 0.4+ 201215 W88 0.3+ 0.2+ 210109 349 0.7- 0.0 201212 T05 0.5- 0.2+ 201215 W88 0.4+ 0.0 210109 349 0.4- 0.2- 201212 T05 0.1+ 0.4+ 201215 G96 0.2- 0.0 210110 C10 0.2- 0.0 201212 T05 0.5+ 0.4- 201215 G96 0.2- 0.0 210110 C10 0.4+ 0.5+ 201212 C77 0.1+ 0.1+ 201215 G96 0.3- 0.0 210110 C10 0.4+ 1.2+ 201212 L06 0.3- 0.3+ 201215 G96 0.1- 0.1- 210117 Q11 0.3+ 0.3- 201212 L06 0.1+ 0.4+ 201215 349 0.6- 0.2+ 210117 Q11 0.2+ 0.5- 201212 L06 0.3- 0.4+ 201215 349 0.3- 0.4+ 210117 Q11 0.4+ 0.3- 201212 C77 0.2+ 0.6- 201215 349 0.7- 0.1+ 210119 A77 0.5- 0.0 201212 L06 0.0 0.0 201216 215 0.1+ 0.2- 210119 A77 0.5- 0.2- ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2021 Jan. 29