Nakano Note (Nakano wa Kangaeru noda) NK 5581 P/2025 A3 (Tsuchinshan)
The following improved orbital elements, by S. Nakano, are from 101 observations 2024 Dec. 25 to 2026 Apr. 22. 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 the previous orbits in CBET 5495 and NK 5463. Epoch = 2026 Mar. 21.0 TT T = 2026 Mar. 15.38912 +/- 0.03995 (m.e.) TT Peri. = 222.34094 +/- 0.00339 Node = 322.43024 +/- 0.00006 (2000.0) Inc. = 9.97608 +/- 0.00004 q = 5.7922062 +/- 0.0000321 AU e = 0.4322029 +/- 0.0000075 a = 10.2011901 +/- 0.0001458 AU n' = 0.03025017 +/- 0.00000065 P = 32.582 +/- 0.0006988 years (+/- 0.26 day) The predicted orbit for the 2058 return is as follows: T = 2058 July 19.43138 TT Epoch = 2058 July 11.0 TT Peri. = 222.26684 e = 0.4289839 Node = 322.33874 (2000.0) a = 10.1229415 AU Inc. = 9.98959 n'= 0.03060159 q = 5.7803628 AU P = 32.208 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2024/ 250122 G00 0.0 0.4- 250305 Q63 0.4+ 0.3- 241225 F52 0.1- 0.3- 250123 Q11 0.1- 0.9+ 250305 Q63 0.1+ 0.1- 241225 F52 0.0 0.0 250123 Q11 0.1+ 0.9+ 250305 Q63 0.1- 0.1+ 241225 F52 0.1+ 0.1- 250125 Q62 0.4- 0.6+ 250305 Q63 0.2+ 0.1- 241225 F52 0.1- 0.0 250125 Q62 0.6- 0.8+ 250305 Q63 0.1+ 0.3- 241228 F52 0.0 0.1- 250128 P13 0.4- 0.2+ 250305 Q63 0.1- 0.0 241228 F52 0.1- 0.0 250128 P13 0.7+ 0.1+ 250305 Q63 0.1+ 0.3- 241228 F52 0.0 0.1+ 250217 Q64 0.3- 0.1+ 250324 F51 0.2+ 0.1+ 241228 F52 0.5+ 0.1+ 250217 Q64 0.0 0.2- 250324 F51 0.2- 0.3+ 241229 F51 0.1+ 0.5+ 250217 Q64 0.0 0.3- 250324 F51 0.2+ 0.3- 241229 F51 0.4- 0.8+ 250223 K77 0.1+ 1.5- 250324 F51 0.1+ 0.1- 241229 F51 0.0 0.1- 250223 K77 1.0+ 0.8- 250329 F51 0.1- 0.2+ 241229 F51 0.4- 0.2+ 250227 W85 0.0 0.0 250329 F51 0.1- 0.0 2025/ 250227 W85 0.1+ 0.1- 250329 F51 0.0 0.0 250104 F52 0.0 0.0 250227 W85 0.1- 0.1- 250329 F51 0.1- 0.0 250104 F52 0.1+ 0.1- 250227 W85 0.1- 0.0 250402 F51 0.5+ 0.1- 250104 F52 0.0 0.3- 250227 W85 0.1+ 0.0 250402 F51 0.3- 0.1+ 250105 D29 0.0 0.0 250227 W85 0.0 0.1- 250402 F51 0.4- 0.1+ 250105 D29 0.3+ 1.2- 250227 W85 0.1+ 0.1- 250402 F51 0.1+ 0.0 250105 D29 0.1+ 1.3- 250227 W85 0.1+ 0.0 2026/ 250107 088 0.6+ 0.3- 250301 Q63 0.1- 0.1+ 260217 F51 0.2+ 0.2+ 250107 088 0.5+ 0.3- 250301 Q63 0.1- 0.2+ 260217 F51 0.1- 0.0 250109 N89 1.0+ 1.0- 250301 Q63 0.1+ 0.1+ 260217 F51 0.0 0.1+ 250109 N89 1.4+ 1.1- 250301 Q63 0.2- 0.0 260317 X03 0.5+ 0.1+ 250111 L06 0.6- 0.8- 250301 Q63 0.0 0.2+ 260317 X03 0.8- 0.3- 250111 L06 0.6- 0.2- 250301 Q63 0.1- 0.2+ 260317 X03 0.4- 0.1- 250111 L06 0.3- 0.5- 250301 Q63 0.1+ 0.1+ 260317 X03 0.2+ 1.9- 250112 M45 0.2- 0.6- 250301 Q63 0.2- 0.2+ 260407 215 0.5- 0.1- 250112 M45 0.1+ 0.4- 250301 Q63 0.1- 0.2+ 260407 215 0.0 0.0 250112 M45 0.2+ 0.5- 250302 215 0.0 1.1+ 260407 215 0.7+ 0.2- 250112 E29 0.3- 0.2+ 250302 215 0.0 0.4+ 260422 F52 0.2+ 0.0 250112 E29 0.2- 0.1- 250302 215 0.1- 0.1- 260422 F52 0.1- 0.0 250112 E29 0.4+ 0.0 250302 K77 0.1+ 0.2+ 260422 F52 0.1+ 0.1- 250112 E29 0.0 0.6+ 250302 K77 0.2+ 0.4+ 260422 F52 0.2- 0.3+ 250122 G00 1.0+ 0.3+ 250305 Q63 0.1- 0.0 ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2026 June 11