Nakano Note (Nakano wa Kangaeru noda) NK 5433 P/PANSTARRS (2025 Q2 = 2015 X9 = 2020 O5)
The following improved orbital elements, by S. Nakano, are from 54 observations 2015 to 2025. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.25 arc second. There is an orbit in CBET 5604 (same orbit). Epoch = 2025 July 24.0 TT T = 2025 July 11.01017 +/- 0.00080 (m.e.) TT Peri. = 81.21664 +/- 0.00022 Node = 271.02810 +/- 0.00005 (2000.0) Inc. = 14.78526 +/- 0.00001 q = 2.2959671 +/- 0.0000017 AU e = 0.2373145 +/- 0.0000005 a = 3.0103719 +/- 0.0000029 AU n' = 0.18870085 +/- 0.00000028 P = 5.223 +/- 0.0000077 years T = 2015 Jan. 29.11666 TT Epoch = 2015 Jan. 18.0 TT Peri. = 80.87112 e = 0.2421778 Node = 271.24807 (2000.0) a = 3.0068458 AU Inc. = 14.77037 n'= 0.18903288 q = 2.2786546 AU P = 5.214 years T = 2020 Apr. 17.58164 TT Epoch = 2020 Apr. 21.0 TT Peri. = 80.85907 e = 0.2378679 Node = 271.08032 (2000.0) a = 3.0091434 AU Inc. = 14.78843 n'= 0.18881641 q = 2.2933649 AU P = 5.220 years The predicted orbit for the 2030 return is as follows: T = 2030 Oct. 12.14803 TT Epoch = 2030 Oct. 26.0 TT Peri. = 83.22614 e = 0.2378903 Node = 270.34644 (2000.0) a = 3.0110569 AU Inc. = 14.75475 n'= 0.18863646 q = 2.2947558 AU P = 5.225 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2015/ 201210 F51 0.2+ 0.3+ 250823 F51 0.5+ 0.0 151212 F51 0.5- 0.1- 201215 F51 0.3+ 0.1- 250823 F51 0.2+ 0.0 151212 F51 0.5- 0.0 201215 F51 0.0 0.3- 250824 T14 0.2+ 0.1+ 2016/ 2024/ 250824 T14 0.3+ 0.1+ 160103 F51 0.1+ 0.2- 240706 F52 0.1+ 0.3+ 250824 T14 0.2+ 0.1+ 160103 F51 0.0 0.0 240706 F52 0.2- 0.8+ 250827 F52 0.2+ 0.1+ 160103 F51 0.1+ 0.2- 240706 F52 0.2+ 0.3- 250827 F52 0.0 0.0 160103 F51 0.1+ 0.2- 240706 F52 0.0 0.4- 250828 T14 0.2+ 0.0 2020/ 2025/ 250828 T14 0.3+ 0.2+ 200730 F51 0.2- 0.1+ 250806 F52 0.1- 0.0 250828 T14 0.2+ 0.1+ 200730 F51 0.2- 0.5+ 250806 F52 0.0 0.3+ 250829 658 0.5- 0.3- 200730 F51 0.2+ 0.1- 250806 F52 0.2+ 0.0 250829 658 0.3- 0.3- 200730 F51 0.1- 0.0 250808 F52 0.2- 0.1- 250829 658 0.6- 0.3- 201116 F51 0.1- 0.0 250808 F52 0.0 0.0 250829 658 0.2- 0.2- 201116 F51 0.0 0.1- 250808 F52 0.1+ 0.0 250829 658 0.8- 0.2- 201116 F51 0.1+ 0.1+ 250808 F52 0.5+ 0.2+ 250830 W62 0.1- 0.2- 201207 F51 0.1- 0.6+ 250823 F52 0.1- 0.1- 250830 W62 0.1- 0.2- 201207 F51 0.3+ 0.1+ 250823 F52 0.1+ 0.0 250831 T12 0.1+ 0.0 201210 F51 0.2- 0.2+ 250823 F52 0.1- 0.3- 250831 T12 0.1- 0.1- 201210 F51 0.5+ 0.6+ 250823 F52 0.1- 0.2- ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2025 Sept. 9