Nakano Note (Nakano wa Kangaeru noda) NK 5464 P/2025 A4 (PANSTARRS)
The following improved orbital elements, by S. Nakano, are from 100 observations 2024 Dec. 21 to 2025 June 17. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.43 arc second. See an orbit in CBET 5496. Epoch = 2025 Jan. 5.0 TT T = 2025 Jan. 13.07017 +/- 0.03102 (m.e.) TT Peri. = 102.78361 +/- 0.00564 Node = 69.91224 +/- 0.00034 (2000.0) Inc. = 32.02565 +/- 0.00009 q = 3.8241171 +/- 0.0000371 AU e = 0.6536803 +/- 0.0000132 a = 11.0421575 +/- 0.0004342 AU n' = 0.02686106 +/- 0.00000159 P = 36.693 +/- 0.0021638 years (+/- 0.79 day) The predicted orbit for the 2061 return is as follows: T = 2061 Nov. 17.29319 TT Epoch = 2061 Dec. 2.0 TT Peri. = 103.23157 e = 0.6537006 Node = 69.82425 (2000.0) a = 11.0356781 AU Inc. = 32.02634 n'= 0.02688472 q = 3.8216484 AU P = 36.661 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 F51 0.0 0.4- 250328 C10 0.3- 0.6- 241221 G96 0.7+ 0.8+ 250122 F51 0.2+ 0.1+ 250328 C10 0.4- 0.6- 241221 G96 0.0 0.2+ 250130 G00 0.3- 0.5- 250406 F52 0.2- 0.3- 241221 G96 0.3+ 0.4+ 250130 G00 0.8- 0.1+ 250406 F52 0.0 0.1+ 2025/ 250221 K77 0.4- 0.9- 250406 F52 0.3- 0.3+ 250103 F52 0.1- 0.4- 250221 K77 0.7- 0.8- 250407 G96 1.2+ 0.2+ 250103 F52 0.5+ 0.3- 250222 G00 1.2- 0.4+ 250407 G96 1.1+ 0.1- 250103 F52 0.2- 0.2+ 250222 G00 0.0 1.1+ 250407 G96 0.3- 0.3+ 250104 L01 0.0 0.8+ 250222 G00 0.3+ 0.5+ 250407 G96 0.3- 0.1+ 250104 L01 0.4- 0.0 250225 X03 0.2- 0.1- 250420 G96 0.1+ 0.1- 250104 L01 0.4- 0.8+ 250225 X03 0.1- 0.2+ 250420 G96 0.4- 0.2- 250104 L01 0.2- 0.5+ 250225 X03 0.1+ 0.1+ 250420 G96 0.3- 0.4+ 250104 T14 0.2+ 0.0 250225 X03 0.6+ 0.0 250420 G96 0.0 0.3- 250104 T14 0.1+ 0.1- 250302 U94 0.2+ 0.5- 250426 F51 0.1- 0.2+ 250104 T14 0.2+ 0.0 250302 U94 0.4+ 0.0 250426 F51 0.1- 0.2+ 250105 G96 0.6- 0.2- 250302 K77 0.9- 0.0 250426 F51 0.2- 0.1- 250105 G96 0.9+ 0.1- 250303 K77 0.8- 0.5- 250426 F51 0.4- 0.1- 250105 G96 0.2- 0.1- 250319 215 1.3- 1.1+ 250502 F52 0.1- 0.0 250105 G96 0.4- 0.1+ 250319 215 0.6- 0.3- 250502 G96 1.6+ 1.2- 250105 F51 0.0 0.1- 250319 K77 (1.6- 2.8-) 250502 G96 0.2+ 0.3- 250105 F51 0.2+ 0.2- 250319 215 0.4- 0.3- 250502 F52 0.0 0.3+ 250105 F51 0.1- 0.1- 250319 K77 1.0+ 1.4- 250502 G96 0.0 0.1- 250106 T12 0.1- 0.0 250321 G96 0.4- 0.1- 250502 G96 0.4- 0.0 250106 T12 0.1- 0.1- 250321 G96 0.2- 0.2+ 250502 F52 0.0 0.1+ 250107 J13 0.1+ 0.1+ 250321 G96 0.2- 0.1- 250502 F52 0.3- 0.1+ 250107 J13 0.1+ 0.0 250321 G96 0.2- 0.3+ 250530 F52 0.5- 0.0 250107 J13 0.1+ 0.1+ 250321 F52 0.1+ 0.1+ 250530 F52 0.0 0.1- 250108 L06 0.0 0.9+ 250321 F52 0.0 0.2+ 250530 F52 0.1- 0.3+ 250108 L06 0.4+ 0.7+ 250321 F52 0.1+ 0.2+ 250530 F52 0.1- 0.1+ 250108 L06 0.1- 0.1+ 250321 F52 0.2+ 0.2+ 250617 G96 0.3- 0.3- 250108 204 0.1+ 0.2- 250325 F52 0.1+ 0.0 250617 G96 0.6+ 1.2- 250108 204 0.1- 0.0 250325 F52 0.0 0.0 250617 G96 0.6+ 0.1+ 250116 Z84 0.2- 0.2+ 250325 F52 0.0 0.0 250617 G96 0.4+ 0.5+ 250116 Z84 0.4- 0.4+ 250325 F52 0.1+ 0.1+ 250122 F51 0.1+ 0.1+ 250328 C10 0.4- 0.2- ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2025 Oct. 9