Nakano Note (Nakano wa Kangaeru noda) NK 4394 P/2020 W1 (Rankin)
The following improved orbital elements, by S. Nakano, are from 89 observations 2020 Aug. 29 to Dec. 18. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.40 arc second. See an orbit in CBET 4886. Epoch = 2020 Apr. 21.0 TT T = 2020 Apr. 3.81636 +/- 0.31900 (m.e.) TT Peri. = 264.73802 +/- 0.03158 Node = 124.26086 +/- 0.00178 (2000.0) Inc. = 10.79207 +/- 0.00012 q = 5.2876188 +/- 0.0002910 AU e = 0.2643883 +/- 0.0000746 a = 7.1880571 +/- 0.0008292 AU n' = 0.05114307 +/- 0.00000885 P = 19.272 +/- 0.0033346 years (+/- 1.22 days) The predicted orbit for the 2039 return is as follows: T = 2039 July 31.34319 TT Epoch = 2039 July 31.0 TT Peri. = 265.19693 e = 0.2638797 Node = 124.08477 (2000.0) a = 7.1757434 AU Inc. = 10.78664 n'= 0.05127477 q = 5.2822104 AU P = 19.222 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2020/ 201112 F51 0.1+ 0.1- 201118 246 0.3- 0.3+ 200829 G96 0.3+ 0.2+ 201116 G96 0.2+ 0.1- 201118 246 1.0+ 0.2- 200829 G96 0.1+ 0.2+ 201116 G96 0.0 0.0 201118 246 0.8+ 0.5- 200829 G96 0.2- 0.4- 201116 F52 0.2+ 0.2- 201118 246 0.2+ 0.8- 200829 G96 0.3- 0.5- 201116 G96 0.3+ 0.0 201118 204 0.6- 0.1- 200912 F52 0.4- 0.1- 201116 G96 0.1+ 0.2- 201118 204 0.5- 0.2- 200912 F52 0.2- 0.4- 201116 F52 0.2- 0.2- 201120 691 0.2- 0.4+ 200912 F52 0.3+ 0.0 201116 F52 0.6+ 0.1+ 201120 691 0.2+ 0.6+ 200912 F52 0.1+ 0.7+ 201116 J04 0.2- 0.1+ 201120 691 0.9- 0.7+ 200919 F51 0.1- 0.2+ 201116 J04 0.3- 0.1- 201126 I52 0.4+ 0.1- 201009 F51 0.8+ 0.3+ 201116 J04 0.5+ 0.4+ 201126 I52 0.1+ 0.5- 201009 F51 0.3+ 0.1+ 201117 711 0.2+ 0.5- 201126 I52 0.3- 0.6- 201009 F51 0.1- 0.1+ 201117 H06 0.7- 0.4+ 201206 G96 0.1- 0.4- 201009 F51 0.3+ 0.4+ 201117 711 0.4- 0.4+ 201206 G96 0.2+ 0.4- 201016 G96 0.1- 1.0- 201117 H06 0.6- 1.0+ 201206 G96 0.3- 0.2- 201016 G96 0.8- 0.5- 201117 H06 0.8- 1.0+ 201206 G96 0.5- 0.1- 201016 G96 0.0 0.4- 201117 I52 0.5+ 0.2+ 201208 F51 0.0 0.3- 201019 F52 0.0 0.2+ 201117 I52 0.1+ 0.2+ 201208 F51 0.1+ 0.5- 201019 F52 0.1+ 0.4+ 201117 I52 0.3- 0.1- 201208 F51 0.3+ 0.0 201019 F52 0.2+ 0.0 201117 I52 0.3- 0.3- 201208 F51 0.1- 0.2+ 201019 F52 0.6+ 0.3+ 201117 N51 0.4- 0.5- 201208 F51 0.1+ 0.1- 201024 F52 0.1- 0.0 201117 N51 0.4- 0.4- 201208 F51 0.1+ 0.1+ 201024 F52 0.1- 0.1- 201117 N51 0.4- 0.3- 201208 F51 0.0 0.1+ 201024 F52 0.0 0.1- 201117 N51 0.1+ 0.5+ 201208 F51 0.0 0.0 201024 F52 0.0 0.0 201117 L01 0.2- 0.3- 201211 F52 0.1+ 0.1+ 201105 G96 0.7- 0.2+ 201117 L01 0.1+ 0.1+ 201211 F52 0.4- 0.0 201105 G96 0.7- 0.6- 201118 711 0.2+ 0.5+ 201211 F52 0.0 0.0 201105 G96 0.1- 0.2- 201118 711 0.1+ 0.5+ 201218 215 1.1- 0.8+ 201108 F52 0.1- 0.4+ 201118 204 0.1- 0.1+ 201218 215 0.4- 0.6+ 201112 F51 0.3+ 0.4+ 201118 246 1.3+ 0.6+ 201218 215 0.4+ 0.4+ ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2021 Jan. 29