Nakano Note (Nakano wa Kangaeru noda) NK 5245 P/Nanshan-Hahn (2024 FG9)
The following improved orbital elements, by S. Nakano, are from 95 observations 2018 to 2024. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.54 arc second. The comet has passed 0.20 AU from Jupiter on 2021 Apr. 30 and will pass 0.20 AU from Jupiter on 2033 Apr. 16 UT. See an orbit in CBET 5401 (same orbit). Epoch = 2024 May 10.0 TT T = 2024 May 20.33931 +/- 0.00016 (m.e.) TT Peri. = 245.90643 +/- 0.00047 Node = 253.04508 +/- 0.00044 (2000.0) Inc. = 1.73108 +/- 0.00003 q = 1.5963715 +/- 0.0000031 AU e = 0.5097333 +/- 0.0000007 a = 3.2561290 +/- 0.0000077 AU n' = 0.16774581 +/- 0.00000060 P = 5.876 +/- 0.0000210 years T = 2018 Mar. 22.15412 TT Epoch = 2018 Mar. 23.0 TT Peri. = 184.47767 e = 0.4811437 Node = 311.45979 (2000.0) a = 3.3024247 AU Inc. = 8.68671 n'= 0.16423083 q = 1.7134838 AU P = 6.001 years The predicted orbit for the 2030 return is as follows: T = 2030 Apr. 8.89452 TT Epoch = 2030 Apr. 9.0 TT Peri. = 246.16002 e = 0.5094058 Node = 252.89198 (2000.0) a = 3.2574607 AU Inc. = 1.73047 n'= 0.16764295 q = 1.5980914 AU P = 5.879 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2018/ 240309 N89 0.1+ 0.7- 240413 104 0.3+ 0.9- 180329 I41 0.9+ 0.3- 240309 N89 1.1+ 0.2- 240414 Y89 (3.8- 0.9+) 180408 I41 0.6+ 0.0 240321 G96 0.3+ 0.2- 240414 Y89 (2.4- 0.5-) 180411 I41 0.7+ 0.3+ 240321 G96 0.4- 0.3+ 240414 Y89 0.3+ 0.4- 180415 I41 0.4- 0.6+ 240321 G96 0.1- 0.3- 240415 Z17 1.0- 0.6+ 180415 I41 0.0 0.2+ 240321 G96 1.2- 0.1- 240415 Z17 0.5- 0.0 180516 W84 1.8- 1.0+ 240321 G96 0.3- 0.5- 240415 Z17 (2.4- 0.8-) 2023/ 240321 G96 0.4+ 0.2- 240416 X09 0.7- 0.9- 231104 F51 0.4+ 0.2+ 240321 G96 0.3- 0.0 240416 X09 0.6- 0.0 231104 F51 0.2+ 0.0 240410 Y89 1.2+ 0.9+ 240417 X09 0.4- 0.9- 231104 F51 0.1- 0.2+ 240410 Y89 0.3- 0.3+ 240428 T04 1.0- 0.5- 231110 F52 0.1- 0.0 240410 Y89 0.8+ 0.0 240428 T04 0.5- 0.1- 231110 F52 0.2+ 0.2+ 240411 Y89 0.0 0.4+ 240428 T04 0.1- 0.6- 231110 F52 0.1- 0.2- 240411 Y89 1.0+ 0.5+ 240502 T04 0.7- 0.0 231110 F52 0.1- 0.1- 240411 Y89 0.6+ 0.6+ 240502 T04 0.4- 0.2- 231118 F52 0.1- 0.0 240412 K78 0.6- 0.6+ 240502 T04 0.2- 0.2- 231118 F52 0.3- 0.1+ 240412 K78 0.4+ 0.5- 240509 T04 0.9- 0.4- 231118 F52 0.0 0.1+ 240412 K78 0.8- 0.7+ 240509 T04 0.4+ 0.6- 231118 F52 0.2- 0.1- 240412 Y89 0.2+ 0.0 240509 T04 1.4- 0.3- 231204 F52 0.1- 0.0 240412 Y89 0.8+ 0.3+ 240510 G00 0.3+ 0.3- 231204 F52 0.1- 0.1- 240412 Y89 0.8+ 0.5+ 240510 G00 1.2- 0.3+ 231204 F52 0.1+ 0.2- 240412 Y05 0.1- 0.9- 240513 Q62 0.4- 0.1+ 231209 F52 0.4+ 0.5+ 240412 Y05 0.2- 0.5+ 240513 Q62 0.6- 0.2- 231209 F52 0.2- 0.3- 240412 Y05 0.5- 0.1+ 240521 M21 1.0- 0.1+ 231209 F52 0.0 0.2- 240413 H21 0.1+ 0.3+ 240521 M21 0.5- 0.6+ 231216 F52 0.3+ 0.2- 240413 H21 0.3+ 0.0 240524 950 0.4- 0.3- 2024/ 240413 H21 0.1+ 0.2- 240524 950 1.1- 0.1+ 240306 F52 0.0 0.2- 240413 H21 0.1- 0.1+ 240525 T03 1.3- 0.2- 240306 F52 0.5- 0.3- 240413 Q06 0.4- 0.2+ 240525 T03 1.5- 0.3- 240306 F52 0.2- 0.2+ 240413 Q06 0.4- 0.3- 240526 Q62 1.1- 0.1- 240308 N87 0.6- 0.4- 240413 Q06 0.7- 0.2- 240526 Q62 1.2- 0.1- 240308 N87 0.1- 0.1+ 240413 204 0.4- 0.5+ 240526 Q62 0.8- 0.4- 240308 N87 0.3+ 0.1- 240413 204 0.4- 0.0 240526 Q62 1.3- 0.5- 240309 N89 0.9+ 1.1- 240413 104 0.1+ 0.1+ ( ) -------- Rejected Obs.
Associate of the CBAT Late edition Syuichi Nakano 2024 May 28