Nakano Note (Nakano wa Kangaeru noda) NK 5469 P/2025 D3 (PANSTARRS)
The following improved orbital elements, by S. Nakano, are from 53 observations 2024 Dec. 30 to 2025 Apr. 2. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.27 arc second. The comet will pass 0.51 AU from Jupiter on 2045 Sept. 19 UT. See an orbit in CBET 5513. Epoch = 2024 July 29.0 TT T = 2024 July 25.54885 +/- 0.02517 (m.e.) TT Peri. = 294.43149 +/- 0.00802 Node = 186.63592 +/- 0.00048 (2000.0) Inc. = 9.64468 +/- 0.00026 q = 2.9654092 +/- 0.0001106 AU e = 0.2524095 +/- 0.0000492 a = 3.9666222 +/- 0.0002999 AU n' = 0.12475927 +/- 0.00001415 P = 7.900 +/- 0.0008959 years (+/- 0.33 day) The predicted orbit for the 2032 return is as follows: T = 2032 June 25.65008 TT Epoch = 2032 June 17.0 TT Peri. = 294.50988 e = 0.2505671 Node = 186.58220 (2000.0) a = 3.9776272 AU Inc. = 9.63652 n'= 0.12424186 q = 2.9809646 AU P = 7.933 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2024/ 250222 O18 0.3- 0.2+ 250226 W62 0.2+ 0.1- 241230 F51 0.1+ 0.0 250223 807 0.0 0.2+ 250226 W62 0.3+ 0.0 2025/ 250223 807 0.6- 0.1+ 250306 O18 0.2+ 0.1+ 250106 F51 0.0 0.1+ 250223 807 0.2- 0.0 250306 O18 0.0 0.1- 250106 F51 0.1- 0.1+ 250223 T14 0.2+ 0.1- 250306 O18 0.2+ 0.1+ 250127 O18 0.2+ 0.2- 250223 T14 0.1+ 0.1- 250306 O18 0.0 0.0 250127 O18 0.2+ 0.1- 250223 T14 0.1+ 0.3- 250318 O18 0.1- 0.2- 250128 O18 0.1+ 0.1- 250224 O18 0.2+ 0.2- 250318 O18 0.1- 0.2+ 250128 O18 0.1- 0.5+ 250224 O18 0.2+ 0.1- 250319 O18 0.4- 0.0 250206 F51 0.2+ 0.4- 250224 O18 0.0 0.1- 250319 O18 0.2+ 0.1+ 250206 F51 0.1- 0.0 250224 O18 0.1+ 0.2- 250322 O18 0.3+ 0.2- 250206 F51 0.4- 0.2+ 250225 095 0.2+ 0.7+ 250322 O18 0.2- 0.1+ 250206 F51 0.2- 0.2- 250225 095 0.3+ 0.5+ 250327 W62 0.1- 0.1+ 250207 F51 0.0 0.0 250225 095 0.5+ 0.8+ 250327 W62 0.2+ 0.2- 250222 F52 0.0 0.2+ 250225 095 0.4+ 0.5+ 250327 W62 0.3- 0.1- 250222 F52 0.1- 0.0 250225 095 0.1- 0.6+ 250402 X07 0.6+ 0.5- 250222 F52 0.1- 0.1- 250225 095 0.2+ 0.5+ 250402 X07 0.7+ 0.0 250222 F52 0.0 0.2+ 250225 095 0.1- 0.4+ 250222 O18 0.1- 0.1+ 250225 095 0.1- 0.8+ ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2025 Oct. 11