Nakano Note (Nakano wa Kangaeru noda) NK 4246 P/2020 R5 (PANSTARRS)

The following improved orbital elements, by S. Nakano, are from 86 observations 2019 May 30 to 2020 Oct. 23. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.35 arc second. See the previous orbit in CBET 4851 (= NK 4210). Epoch = 2020 May 31.0 TT T = 2020 May 28.08518 +/- 0.00571 (m.e.) TT Peri. = 82.30116 +/- 0.00099 Node = 272.96886 +/- 0.00006 (2000.0) Inc. = 11.45440 +/- 0.00001 q = 3.4130476 +/- 0.0000048 AU e = 0.3144668 +/- 0.0000033 a = 4.9786761 +/- 0.0000246 AU n' = 0.08872240 +/- 0.00000066 P = 11.109 +/- 0.0000825 years The predicted orbit for the 2031 return is as follows: T = 2031 July 22.64680 TT Epoch = 2031 Aug. 2.0 TT Peri. = 82.91081 e = 0.3144201 Node = 272.89598 (2000.0) a = 4.9913961 AU Inc. = 11.45431 n'= 0.08838346 q = 3.4220006 AU P = 11.151 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2019/ 200903 F51 0.3- 0.4- 200918 G96 0.3- 0.4- 190530 F51 0.2+ 0.1- 200903 F51 0.0 0.1+ 200918 L01 0.3- 0.4+ 190530 F51 0.1+ 0.1- 200914 F52 0.1- 0.0 200918 L01 0.7- 0.7- 190630 F51 0.0 0.0 200914 F52 0.1- 0.0 201007 G96 0.5- 0.8- 190630 F51 0.1+ 0.0 200914 F52 0.1+ 0.1+ 201007 G96 0.0 0.0 190630 F51 0.0 0.1- 200914 F52 0.1- 0.3+ 201007 G96 0.3+ 0.8- 190725 F51 0.0 0.1+ 200915 H06 0.3- 0.6- 201007 F51 0.2+ 0.0 190725 F51 0.1- 0.1+ 200915 H06 0.5- 0.2- 201007 F51 0.1+ 0.1+ 190725 F51 0.1+ 0.1- 200916 F52 0.1- 0.2- 201007 F51 0.1+ 0.2+ 190725 F51 0.1- 0.1- 200916 F52 0.2- 0.0 201007 F51 0.0 0.1+ 190729 F52 0.3- 0.1+ 200916 F52 0.2+ 0.1- 201009 941 0.2+ 0.4- 190729 F52 0.1+ 0.1+ 200916 F52 0.1+ 0.1+ 201009 941 0.0 0.3- 190729 F52 0.0 0.2- 200916 F52 0.0 0.2- 201009 941 0.4- 0.5- 190729 F52 0.1- 0.1- 200916 F52 0.1+ 0.2+ 201014 G96 0.4+ 0.0 190805 F51 0.1- 0.0 200916 F52 0.0 0.2+ 201014 G96 0.6- 0.8- 190805 F51 0.1+ 0.1+ 200916 F52 0.1- 0.0 201014 G96 0.5- 1.0- 190805 F51 0.2- 0.1- 200916 F52 0.0 0.2- 201014 G96 0.3- 0.6- 190805 F51 0.2+ 0.3- 200916 F52 0.1+ 0.0 201019 215 0.6- 1.2- 190903 F51 0.0 0.5+ 200916 F52 0.1+ 0.2+ 201019 215 0.7- 1.3- 190903 F51 0.1- 0.2+ 200916 F52 0.1- 0.1+ 201019 215 0.8- 1.4- 2020/ 200917 711 0.4- 0.3+ 201021 F51 0.1+ 0.2+ 200731 G96 0.7- 0.4- 200917 711 0.2- 0.1- 201021 F51 0.0 0.1+ 200731 G96 0.6- 0.4- 200917 711 0.5- 0.4+ 201021 F51 0.1+ 0.1+ 200731 G96 0.2- 0.2- 200917 F51 0.1+ 0.1+ 201021 F51 0.1+ 0.1+ 200731 G96 0.0 0.2- 200917 F51 0.1+ 0.1+ 201023 G96 0.3- 0.6- 200823 F51 0.1+ 0.0 200917 F51 0.1+ 0.1+ 201023 G96 0.2+ 0.5- 200823 F51 0.1- 0.1+ 200917 F51 0.1+ 0.2+ 201023 G96 0.1+ 0.4- 200823 F51 0.1+ 0.1- 200918 G96 0.6- 0.8- 201023 G96 0.2- 0.8- 200823 F51 0.0 0.1+ 200918 G96 0.8- 0.5- 200903 F51 0.0 0.3- 200918 G96 0.4- 0.2- ( ) -------- Rejected Obs.

Associate of the CBAT Syuichi Nakano 2020 Nov. 8

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