Nakano Note (Nakano wa Kangaeru noda) NK 3888 A/2019 O4
The following improved orbital elements, by S. Nakano, are from 36 observations 2018 Aug. 6 to 2019 Aug. 27. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.21 arc second. Epoch = 2020 Feb. 1.0 TT T = 2020 Feb. 9.92793 +/- 0.00663 (m.e.) TT Peri. = 61.80539 +/- 0.00109 Node = 354.91838 +/- 0.00008 (2000.0) Inc. = 115.08488 +/- 0.00005 q = 3.6443864 +/- 0.0000321 AU e = 0.8891020 +/- 0.0000512 a = 32.8625130 +/- 0.0151870 AU n' = 0.00523182 +/- 0.00000363 P = 188.387 +/- 0.1305913 years (+/-47.70 days) The predicted orbit for the 2208 return is as follows: T = 2208 Sept.19.54780 TT Epoch = 2208 Sept. 3.0 TT Peri. = 61.68865 e = 0.8898435 Node = 354.95276 (2000.0) a = 33.0787297 AU Inc. = 115.03074 n'= 0.00518061 q = 3.6438387 AU P = 190.249 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2018/ 190729 H21 0.2- 0.2- 190731 L01 0.1+ 0.6- 180806 F51 0.0 0.3+ 190729 H21 0.0 0.1+ 190731 L01 0.7- 0.7+ 180821 F51 0.5- 0.1- 190729 H21 0.1+ 0.2- 190802 H01 0.0 0.0 180821 F51 0.2+ 0.2+ 190730 H36 0.3+ 0.0 190802 H01 0.1+ 0.0 180821 F51 0.1+ 0.1- 190730 H36 (2.1- 1.3-) 190802 H01 0.1- 0.0 180821 F51 0.3+ 0.3- 190730 H01 0.2- 0.0 190802 H01 0.0 0.0 2019/ 190730 H01 0.0 0.0 190804 Z84 0.0 0.1- 190629 F51 0.0 0.0 190730 H01 0.1- 0.1- 190804 Z84 0.0 0.2- 190629 F51 0.2- 0.0 190730 H01 0.1+ 0.0 190811 568 0.0 0.1+ 190629 F51 0.0 0.1- 190731 711 0.3+ 0.1+ 190811 568 0.0 0.0 190727 F51 0.4+ 0.1+ 190731 711 0.2+ 0.1+ 190811 568 0.0 0.0 190727 F51 0.2- 0.1- 190731 711 0.3+ 0.0 190827 H06 0.1+ 0.4- 190727 F51 0.1- 0.0 190731 L01 0.2+ 0.5+ 190827 H06 0.1- 0.2+ ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2019 Sept. 7