Nakano Note (Nakano wa Kangaeru noda) NK 5471 C/2025 E1 (PANSTARRS)
The following improved orbital elements, by S. Nakano, are from 33 observations 2025 Jan. 3 to Apr. 6. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.30 arc second. See an orbit in CBET 5518. Epoch = 2026 Oct. 7.0 TT T = 2026 Sept.23.71002 +/- 0.01702 (m.e.) TT Peri. = 274.42776 +/- 0.00240 Node = 344.58801 +/- 0.00067 (2000.0) Inc. = 69.05933 +/- 0.00155 q = 3.9979354 +/- 0.0001707 AU e = 0.9978969 +/- 0.0000957 1/a = +0.0005260 +/- 0.0000239 1/AU origin = +0.000631 (Q= 6) future = +0.000376 The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2025/ 250302 F51 0.1- 0.1- 250303 M45 0.4- 0.0 250103 F51 0.1- 0.3- 250302 F51 0.1- 0.0 250304 X07 0.3- 0.2- 250103 F51 0.0 0.2- 250302 F51 0.0 0.1+ 250304 X07 0.1+ 0.0 250103 F51 0.1+ 0.1+ 250303 807 0.0 0.0 250319 215 0.3+ 0.8+ 250104 F52 0.3- 0.2+ 250303 807 0.2- 0.1- 250319 215 0.2+ 0.4+ 250104 F52 0.0 0.0 250303 807 0.0 0.1- 250319 215 0.4- 1.5- 250104 F52 0.1- 0.2- 250303 807 0.1+ 0.1- 250406 F52 0.8+ 0.2+ 250104 F52 0.1- 0.0 250303 T14 0.1- 0.1+ 250406 F52 0.3- 0.1- 250125 F52 0.9+ 0.4+ 250303 T14 0.0 0.1+ 250406 F52 0.2- 0.0 250125 F52 0.1+ 0.2+ 250303 T14 0.1- 0.1+ 250406 F52 0.1- 0.1- 250302 F51 0.1- 0.0 250303 M45 0.0 0.0 250302 F51 0.0 0.0 250303 M45 0.3- 0.2+ ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2025 Oct. 11