Nakano Note (Nakano wa Kangaeru noda) NK 5533 P/2025 W4 (PANSTARRS)
The following improved orbital elements, by S. Nakano, are from 85 observations 2025 Sept. 5 to Dec. 23. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.53 arc second. See an orbit in CBET 5648. Epoch = 2025 Oct. 12.0 TT T = 2025 Oct. 4.50025 +/- 0.02231 (m.e.) TT Peri. = 172.28905 +/- 0.00839 Node = 237.12105 +/- 0.00083 (2000.0) Inc. = 1.29821 +/- 0.00007 q = 2.0343935 +/- 0.0000212 AU e = 0.2110773 +/- 0.0000163 a = 2.5786981 +/- 0.0000596 AU n' = 0.23801446 +/- 0.00000825 P = 4.141 +/- 0.0001435 years (+/- 0.05 day) The predicted orbit for the 2029 return is as follows: T = 2029 Nov. 23.39294 TT Epoch = 2029 Dec. 10.0 TT Peri. = 172.06246 e = 0.2121373 Node = 236.99602 (2000.0) a = 2.5786226 AU Inc. = 1.29843 n'= 0.23802490 q = 2.0316006 AU P = 4.141 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2025/ 251127 L06 0.4+ 0.3- 251208 691 0.2- 0.0 250905 F51 0.1- 0.1- 251127 W85 0.6+ 0.0 251208 691 0.6- 0.0 250905 F51 0.0 0.1+ 251127 W85 0.8+ 0.0 251209 M57 0.1- 0.2+ 250905 F51 0.3- 0.1- 251127 W85 0.5+ 0.2- 251209 M57 0.1- 0.3- 250905 F51 0.1+ 0.0 251127 A77 0.9+ 1.1+ 251210 C82 0.7- 0.5+ 250920 F52 0.1+ 0.1+ 251127 A77 0.1- 0.6+ 251210 C82 0.4+ 0.6+ 250920 F52 0.1- 0.0 251127 A77 0.9+ 0.7+ 251211 T14 0.7+ 0.1+ 250920 F52 0.7- 0.0 251127 587 0.3+ 0.1+ 251211 T14 0.7+ 0.1+ 250930 F52 0.5+ 0.1+ 251127 587 0.3+ 0.0 251211 T14 0.7+ 0.0 250930 F52 1.1+ 0.1+ 251128 L27 0.8- 0.1+ 251211 L27 (2.9- 0.7+) 251115 G96 1.6- 0.5- 251128 204 0.6- 0.3- 251211 L27 0.3- 0.6+ 251115 G96 0.4- 0.3+ 251128 L27 0.9- 0.3- 251211 L27 0.5- 0.1+ 251115 G96 1.5- 0.4+ 251128 L27 0.0 0.2- 251211 L27 1.0- 0.5- 251115 G96 1.5- 0.4- 251129 V37 0.9+ 0.1+ 251212 D66 0.0 0.8- 251123 F51 0.6+ 0.2+ 251129 V37 1.0+ 0.1+ 251212 D66 0.8+ 0.1+ 251123 F51 0.4+ 0.1- 251129 V37 1.0+ 0.2+ 251212 D66 0.1+ 0.6- 251123 F51 0.2+ 0.1+ 251129 G96 0.2+ 0.1+ 251214 G00 0.2- 0.0 251123 F51 0.4+ 0.2- 251129 G96 0.3- 0.0 251214 G00 1.0- 0.5+ 251124 W62 0.2+ 0.1- 251129 G96 0.7- 0.4- 251214 G00 0.7+ 0.3+ 251124 W62 0.3+ 0.1+ 251129 G96 0.6- 0.2- 251216 691 0.9- 0.0 251124 W62 0.6+ 0.1- 251130 I41 0.1- 0.1- 251216 691 0.8+ 0.1- 251124 M45 0.7+ 0.2- 251130 I41 0.3- 0.2+ 251216 691 0.8- 0.2- 251124 M45 0.8+ 0.3- 251130 I41 0.9- 0.4- 251222 W62 0.1- 0.1+ 251125 X09 0.3+ 0.2- 251130 C10 (2.5- 0.5-) 251222 W62 0.2+ 0.2+ 251125 X09 0.7+ 1.0+ 251130 C10 1.0+ 0.7+ 251222 W62 0.3- 0.3+ 251126 F51 0.7+ 0.0 251130 C10 0.0 0.5- 251223 X03 0.8+ 0.6- 251126 F51 0.9+ 0.1+ 251207 R59 0.5- 0.4+ 251223 X03 0.7+ 0.0 251126 T12 1.0+ 0.1+ 251207 R59 0.4- 0.1- 251223 X03 0.6+ 0.2- 251126 T12 1.0+ 0.0 251207 R59 1.0- 0.6- 251126 L06 0.2+ 0.2+ 251208 691 0.8- 0.1+ ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2026 Jan. 12