Nakano Note (Nakano wa Kangaeru noda) NK 3390 P/WISE (2010 D1 = 2017 O2)
The following improved orbital elements, by S. Nakano, are from 25 observations 2009 to 2017. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.44 arc second. Residuals from the prediction in NK 2738 (HICQ 2010-2017) were +0.54 deg for Right Ascension and +0.14 deg for Declination with the delta-T correction = -1.86 days. Epoch = 2018 Jan. 2.0 TT T = 2017 Dec. 17.18361 +/- 0.01252 (m.e.) TT Peri. = 226.18553 +/- 0.00239 Node = 160.81013 +/- 0.00027 (2000.0) Inc. = 9.62945 +/- 0.00002 q = 2.6898631 +/- 0.0000329 AU e = 0.3540949 +/- 0.0000073 a = 4.1644868 +/- 0.0000167 AU n' = 0.11597432 +/- 0.00000070 P = 8.498 +/- 0.0000510 years T = 2009 June 25.76898 TT Epoch = 2009 June 18.0 TT Peri. = 225.94966 e = 0.3562080 Node = 160.90310 (2000.0) a = 4.1461876 AU Inc. = 9.64685 n'= 0.11674295 q = 2.6692825 AU P = 8.443 years The predicted orbit for the 2026 return is as follows: T = 2026 June 12.57480 TT Epoch = 2026 June 9.0 TT Peri. = 226.31465 e = 0.3554678 Node = 160.74730 (2000.0) a = 4.1497053 AU Inc. = 9.64057 n'= 0.11659453 q = 2.6746185 AU P = 8.453 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2009/ 100217 C51 (2.9- 1.2+) 170730 F51 0.2- 0.1+ 091109 703 0.4- 0.5- 100217 C51 (2.9- 2.7+) 170730 F51 0.2- 0.0 091109 703 0.5- 0.2- 100217 C51 (1.4+ 3.4+) 170730 F51 0.3- 0.1+ 091109 703 0.4- 1.0- 100218 C51 0.3+ 0.3+ 170801 568 0.1+ 0.0 091109 703 0.3+ 0.7+ 100218 C51 (8.5- 1.3+) 170801 568 0.2+ 0.0 091210 703 (1.1+ 2.7+) 100219 291 0.1- 0.2- 170801 568 0.3+ 0.1- 091210 703 (2.3+ 1.0+) 100219 291 0.0 0.1- 170802 W96 0.6- 0.1+ 091210 703 0.3+ 0.8+ 100219 291 0.6+ 0.0 170802 W96 0.1+ 0.3- 091210 703 0.1+ 1.6+ 100220 568 0.1- 0.0 170802 W96 0.6- 0.2- 2010/ 100220 568 0.1+ 0.2- 170803 G40 0.3+ 0.0 100217 C51 (4.0- 1.4-) 100220 568 0.1+ 0.1+ 170803 G40 0.6+ 0.2- 100217 C51 1.2- 0.6- 2017/ ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2017 Aug. 4