Nakano Note (Nakano wa Kangaeru noda) NK 4382 P/2020 S2 (PANSTARRS)

The following improved orbital elements, by S. Nakano, are from 85 observations 2020 Aug. 19 to 2021 Jan. 4. 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. See an orbit in CBET 4854. Epoch = 2020 Dec. 17.0 TT T = 2020 Dec. 21.94059 +/- 0.00015 (m.e.) TT Peri. = 202.26596 +/- 0.00010 Node = 197.68537 +/- 0.00003 (2000.0) Inc. = 22.39785 +/- 0.00004 q = 1.7560319 +/- 0.0000019 AU e = 0.8274574 +/- 0.0000042 a = 10.1773814 +/- 0.0002491 AU n' = 0.03035638 +/- 0.00000111 P = 32.468 +/- 0.0011920 years (+/- 0.44 day) The predicted orbit for the 2053 return is as follows: T = 2053 Aug. 29.79213 TT Epoch = 2053 Sept.15.0 TT Peri. = 202.41885 e = 0.8276318 Node = 197.54321 (2000.0) a = 10.2557633 AU Inc. = 22.31317 n'= 0.03000904 q = 1.7677671 AU P = 32.844 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2020/ 200918 711 0.2+ 0.4+ 201017 G96 0.2+ 0.1- 200819 F52 0.0 0.2- 200918 711 0.2+ 0.2+ 201017 G96 0.0 0.1+ 200819 F52 0.3+ 0.5- 200918 711 0.4+ 0.1+ 201017 G96 0.4+ 0.0 200906 G96 0.8- 0.2+ 200918 L01 0.0 0.3- 201017 G96 0.1- 0.3- 200906 G96 0.6- 0.2- 200918 L01 0.3+ 0.4- 201019 215 (0.4- 2.9+) 200906 G96 1.0- 1.0- 200918 L01 0.7+ 0.7- 201019 215 (0.4- 2.6+) 200911 G96 1.2- 0.9+ 200918 L01 0.1+ 0.3+ 201019 215 (2.1+ 0.3+) 200911 G96 1.4- 0.8+ 200918 246 0.4+ 0.1- 201105 F52 0.0 0.1- 200911 G96 0.9+ 1.3- 200918 246 0.0 1.6- 201105 F52 0.1- 0.2- 200916 F51 0.1- 0.1+ 200918 246 0.6- 1.3- 201105 F52 0.3+ 0.0 200916 F51 0.0 0.1+ 200918 246 0.9- 0.9- 201105 F52 0.2- 0.2- 200916 F51 0.0 0.0 200920 G96 0.1- 0.4+ 201106 D29 0.1+ 0.3- 200916 204 1.0- 0.5- 200920 G96 0.0 0.3- 201106 D29 0.1+ 0.5- 200916 204 0.7- 0.4- 200920 G96 0.2- 0.3- 201106 D29 0.6+ 0.3- 200917 204 0.1- 0.0 200920 G96 0.3+ 0.0 201117 G96 0.4+ 0.3+ 200917 711 0.7+ 0.4+ 201007 G96 0.3+ 0.1- 201117 G96 0.0 0.1- 200917 711 0.6+ 0.3+ 201007 G96 0.2- 0.6+ 201117 G96 0.4+ 0.1- 200917 711 0.6+ 0.3+ 201007 G96 0.3- 0.0 201117 G96 0.4+ 0.0 200917 H36 0.1+ 0.2+ 201007 G96 0.3+ 0.3- 201208 G96 0.2+ 0.0 200917 H36 0.2+ 0.5+ 201007 F52 0.1- 0.2+ 201208 G96 0.6+ 0.1- 200917 H36 0.3+ 0.1+ 201007 F52 0.0 0.0 201208 G96 1.8+ 0.2- 200917 H06 0.4+ 0.3+ 201007 F52 0.0 0.1+ 201208 G96 0.5+ 0.1+ 200917 H06 0.2- 0.4+ 201007 F52 0.0 0.1+ 2021/ 200917 H06 0.1+ 0.4+ 201014 F51 0.2- 0.1+ 210102 H06 0.5- 0.5+ 200917 568 0.0 0.1+ 201014 F51 0.2- 0.0 210102 H06 0.3- 0.7+ 200917 568 0.0 0.1+ 201014 F51 0.0 0.1+ 210102 H06 0.5- 0.4+ 200917 568 0.0 0.2+ 201014 F51 0.1+ 0.0 210104 F51 0.0 0.1- 200917 F51 0.0 0.1+ 201016 941 (0.2+ 2.4+) 210104 F51 0.0 0.0 200917 F51 0.1+ 0.0 201016 941 0.2+ 0.7+ 210104 F51 0.3- 0.1- 200917 F51 0.1+ 0.1- 201016 941 0.6+ 0.1- 200917 F51 0.0 0.1+ 201016 941 0.4+ 0.6- ( ) -------- Rejected Obs.

Associate of the CBAT Syuichi Nakano 2021 Jan. 29

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