Nakano Note (Nakano wa Kangaeru noda) NK 4192 P/2017 R1 (PANSTARRS)
The following improved orbital elements, by S. Nakano, are from 71 observations 2017 July 18 to 2018 Jan. 6. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.37 arc second. See the previous orbit in NK 3541. Epoch = 2017 Mar. 28.0 TT T = 2017 Apr. 8.17848 +/- 0.07165 (m.e.) TT Peri. = 178.37404 +/- 0.01344 Node = 143.65314 +/- 0.00056 (2000.0) Inc. = 2.57341 +/- 0.00006 q = 3.3273327 +/- 0.0000699 AU e = 0.1945691 +/- 0.0000326 a = 4.1311213 +/- 0.0001885 AU n' = 0.11738217 +/- 0.00000803 P = 8.397 +/- 0.0005747 years (+/- 0.21 day) The predicted orbit for the 2025 return is as follows: T = 2025 Sept. 9.46787 TT Epoch = 2025 Sept. 2.0 TT Peri. = 178.85830 e = 0.1945791 Node = 143.59116 (2000.0) a = 4.1318557 AU Inc. = 2.57486 n'= 0.11735088 q = 3.3278828 AU P = 8.399 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2017/ 170914 F51 0.0 0.2+ 170918 691 1.2- 0.0 170718 W84 0.2+ 0.2- 170914 F51 0.2- 0.0 170918 691 1.2- 0.3+ 170721 W84 0.3+ 0.0 170914 F51 0.1+ 0.0 170918 I52 0.2+ 0.2+ 170724 W84 0.4+ 0.1+ 170914 F51 0.1+ 0.0 170918 I52 0.6- 0.3+ 170730 W84 0.3+ 0.1- 170915 I52 0.4- 0.9+ 170918 I52 0.5- 0.4- 170730 F51 0.2- 0.0 170915 I52 0.3+ 0.7+ 170918 I52 1.2- 0.5+ 170730 F51 0.1- 0.1+ 170915 I52 0.7- 0.1- 170919 691 1.7- 0.4- 170730 F51 0.3- 0.1+ 170915 W85 0.1+ 0.3- 170919 691 0.1- 0.4+ 170730 F51 0.1- 0.1+ 170915 W85 0.1+ 0.4- 170919 691 0.3- 0.4- 170801 F51 0.4+ 0.2- 170915 W85 0.2+ 0.4- 170919 I52 0.2+ 0.3- 170801 F51 0.3+ 0.1+ 170915 W85 0.0 0.4- 170919 I52 0.1+ 0.0 170801 F51 0.0 0.1+ 170915 W85 0.5+ 0.3- 170919 I52 0.3- 0.4- 170801 F51 0.3+ 0.1- 170915 568 0.2+ 0.1- 170919 I52 0.4- 0.3- 170803 F51 0.2- 0.0 170915 568 0.2+ 0.0 170920 W84 0.1+ 0.1- 170803 F51 0.3- 0.2- 170915 568 0.2+ 0.0 170928 F51 0.2+ 0.0 170803 F51 0.1- 0.0 170915 Q62 0.6- 0.0 170928 F51 0.0 0.2+ 170803 F51 0.2- 0.2+ 170915 Q62 0.4- 0.2+ 170928 F51 0.0 0.1+ 170817 F51 0.3+ 0.0 170915 Q62 0.1- 0.3+ 171014 215 0.4- 0.7+ 170817 F51 0.1+ 0.2+ 170917 W84 0.1+ 0.1- 171014 215 0.1- 0.0 170817 F51 0.1+ 0.0 170917 W84 0.3+ 0.0 171014 215 0.0 0.5- 170817 F51 0.1+ 0.0 170917 F51 0.0 0.0 2018/ 170902 G96 0.3- 0.2+ 170917 F51 0.1+ 0.1- 180106 F51 0.2- 0.1- 170902 G96 0.5- 0.1- 170917 F51 0.0 0.2- 180106 F51 0.1+ 0.2+ 170902 G96 0.6- 0.6- 170917 F51 0.1- 0.2- 170902 G96 0.7- 0.2- 170918 691 1.1- 0.4- ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2020 Sept. 5