Nakano Note (Nakano wa Kangaeru noda) NK 4305 P/2020 R5 (PANSTARRS)

The following improved orbital elements, by S. Nakano, are from 100 observations 2019 May 30 to 2020 Nov. 11. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.38 arc second. See the previous orbit in CBET 4851 (= NK 4210) and NK 4246. Epoch = 2020 May 31.0 TT T = 2020 May 28.08774 +/- 0.00570 (m.e.) TT Peri. = 82.30162 +/- 0.00098 Node = 272.96882 +/- 0.00006 (2000.0) Inc. = 11.45439 +/- 0.00001 q = 3.4130474 +/- 0.0000047 AU e = 0.3144700 +/- 0.0000026 a = 4.9786989 +/- 0.0000198 AU n' = 0.08872179 +/- 0.00000053 P = 11.109 +/- 0.0000662 years The predicted orbit for the 2031 return is as follows: T = 2031 July 22.67744 TT Epoch = 2031 Aug. 2.0 TT Peri. = 82.91132 e = 0.3144234 Node = 272.89593 (2000.0) a = 4.9914171 AU Inc. = 11.45431 n'= 0.08838291 q = 3.4219988 AU P = 11.152 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2019/ 200914 F52 0.1+ 0.1+ 201007 F51 0.0 0.2+ 190530 F51 0.2+ 0.1- 200914 F52 0.1- 0.3+ 201007 F51 0.0 0.1+ 190530 F51 0.2+ 0.1- 200915 H06 0.3- 0.6- 201009 941 0.1+ 0.4- 190630 F51 0.0 0.1- 200915 H06 0.5- 0.2- 201009 941 0.0 0.3- 190630 F51 0.1+ 0.0 200916 F52 0.2- 0.2- 201009 941 0.4- 0.5- 190630 F51 0.0 0.1- 200916 F52 0.2- 0.0 201014 G96 0.3+ 0.0 190725 F51 0.0 0.1+ 200916 F52 0.2+ 0.1- 201014 G96 0.7- 0.8- 190725 F51 0.1- 0.1+ 200916 F52 0.1+ 0.1+ 201014 G96 0.6- 1.0- 190725 F51 0.1+ 0.1- 200916 F52 0.0 0.2- 201014 G96 0.3- 0.6- 190725 F51 0.1- 0.1- 200916 F52 0.1+ 0.2+ 201019 215 0.7- 1.2- 190729 F52 0.3- 0.1+ 200916 F52 0.0 0.3+ 201019 215 0.7- 1.3- 190729 F52 0.1+ 0.1+ 200916 F52 0.1- 0.0 201019 215 0.8- 1.4- 190729 F52 0.0 0.2- 200916 F52 0.0 0.2- 201021 F51 0.1+ 0.2+ 190729 F52 0.1- 0.1- 200916 F52 0.1+ 0.0 201021 F51 0.0 0.1+ 190805 F51 0.1- 0.0 200916 F52 0.1+ 0.2+ 201021 F51 0.1+ 0.1+ 190805 F51 0.1+ 0.1+ 200916 F52 0.1- 0.1+ 201021 F51 0.1+ 0.1+ 190805 F51 0.2- 0.1- 200917 711 0.4- 0.3+ 201023 G96 0.3- 0.6- 190805 F51 0.2+ 0.2- 200917 711 0.2- 0.1- 201023 G96 0.1+ 0.5- 190903 F51 0.0 0.5+ 200917 711 0.5- 0.4+ 201023 G96 0.0 0.4- 190903 F51 0.1- 0.2+ 200917 F51 0.1+ 0.1+ 201023 G96 0.2- 0.8- 2020/ 200917 F51 0.1+ 0.2+ 201107 D29 0.0 0.6- 200731 G96 0.6- 0.4- 200917 F51 0.1+ 0.2+ 201107 D29 0.2- 0.3- 200731 G96 0.6- 0.4- 200917 F51 0.1+ 0.2+ 201107 D29 0.7+ 0.5- 200731 G96 0.1- 0.2- 200918 G96 0.6- 0.8- 201107 K88 0.1- 0.3+ 200731 G96 0.0 0.2- 200918 G96 0.8- 0.5- 201107 K88 0.9- 0.4- 200823 F51 0.1+ 0.0 200918 G96 0.4- 0.2- 201107 K88 0.9- 0.4- 200823 F51 0.1- 0.1+ 200918 G96 0.3- 0.4- 201109 F51 0.3+ 0.0 200823 F51 0.1+ 0.1- 200918 L01 0.3- 0.4+ 201109 F51 0.3+ 0.0 200823 F51 0.1+ 0.1+ 200918 L01 0.7- 0.6- 201109 F51 0.1+ 0.1+ 200903 F51 0.0 0.3- 201007 G96 0.5- 0.8- 201109 F51 0.2+ 0.1- 200903 F51 0.3- 0.4- 201007 G96 0.1- 0.0 201111 G96 0.1+ 0.2+ 200903 F51 0.0 0.1+ 201007 G96 0.2+ 0.8- 201111 G96 0.1- 0.9- 200914 F52 0.1- 0.0 201007 F51 0.2+ 0.0 201111 G96 0.0 0.4- 200914 F52 0.1- 0.1+ 201007 F51 0.1+ 0.1+ 201111 G96 0.6- 1.2- ( ) -------- Rejected Obs.

Associate of the CBAT Syuichi Nakano 2020 Dec. 9

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