Nakano Note (Nakano wa Kangaeru noda) NK 4222 P/2020 K9 (Lemmon-PANSTARRS)
The following improved orbital elements, by S. Nakano, are from 86 observations 2020 May 22 to Sept. 15. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.45 arc second. See an orbits in CBET 4797. Epoch = 2021 Jan. 26.0 TT T = 2021 Feb. 11.80837 +/- 0.01405 (m.e.) TT Peri. = 196.87432 +/- 0.00397 Node = 166.23943 +/- 0.00017 (2000.0) Inc. = 23.20915 +/- 0.00020 q = 2.8494487 +/- 0.0000363 AU e = 0.3216063 +/- 0.0000192 a = 4.2002877 +/- 0.0001305 AU n' = 0.11449473 +/- 0.00000533 P = 8.608 +/- 0.0004011 years (+/- 0.15 day) The predicted orbit for the 2029 return is as follows: T = 2029 Sept.28.68380 TT Epoch = 2029 Sept.21.0 TT Peri. = 196.91154 e = 0.3200221 Node = 166.23158 (2000.0) a = 4.2155085 AU Inc. = 23.17809 n'= 0.11387519 q = 2.8664524 AU P = 8.655 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2020/ 200619 Q11 0.5+ 0.0 200811 T08 0.1- 0.1- 200522 G96 0.1+ 0.2- 200620 204 0.3- 0.2- 200818 G96 0.3- 0.1+ 200522 G96 0.1- 0.2- 200620 204 0.4- 0.1- 200818 G96 0.5- 0.2- 200522 G96 0.1- 0.1+ 200620 204 0.4- 0.2+ 200818 G96 0.2- 0.1- 200522 G96 0.2- 0.0 200620 Q11 0.0 0.4- 200818 G96 0.5- 0.2- 200526 F51 0.0 0.1+ 200620 Q11 0.1- 0.5- 200819 T08 0.9- 0.0 200526 F51 0.2+ 0.1+ 200624 215 0.8- 0.1- 200819 T08 0.4- 0.4+ 200526 F51 0.1+ 0.0 200624 215 0.6- 0.2- 200819 T08 1.1- 0.6- 200529 T05 0.6- 0.3- 200624 215 0.5- 0.4- 200819 T08 0.8- 0.3- 200529 T05 0.5+ 0.0 200705 118 1.5- 0.4- 200820 K77 (0.6+ 2.1-) 200529 T05 0.7- 0.2- 200705 118 0.9- 0.1+ 200820 K77 1.0- 0.4+ 200529 T05 1.2- 0.6- 200718 T08 0.3- 0.1- 200904 F51 0.0 0.0 200614 F51 0.0 0.0 200718 T08 0.6- 0.2+ 200904 F51 0.1+ 0.0 200614 F51 0.1+ 0.2- 200718 T08 0.1- 0.8- 200904 F51 0.0 0.1- 200616 Q62 0.6- 0.2+ 200718 T08 (2.4+ 0.4+) 200911 G96 0.1- 0.1+ 200616 Q62 0.5- 0.0 200718 T08 0.1+ 1.0+ 200911 G96 0.1- 0.2+ 200616 Q62 0.3- 0.1- 200718 T08 (3.3- 0.6-) 200911 G96 0.2- 0.1+ 200617 568 0.0 0.0 200718 T08 0.4- 0.1+ 200911 G96 0.5- 0.1+ 200617 568 0.1+ 0.0 200721 F52 0.2+ 0.0 200912 F51 0.3+ 0.1+ 200617 568 0.1+ 0.0 200721 F52 0.2- 0.3+ 200912 F51 0.1- 0.0 200617 T03 0.1+ 0.2- 200721 F52 0.2+ 0.4+ 200912 F51 0.0 0.2+ 200617 T03 0.6+ 0.3- 200722 T08 0.6- 1.3- 200912 F51 0.1+ 0.0 200617 T03 0.2+ 0.2+ 200722 T08 1.0- 0.3+ 200913 F52 0.1- 0.2- 200617 T03 0.4+ 0.0 200722 T08 0.8- 0.8- 200913 F52 0.2+ 0.3- 200617 T03 0.1+ 0.1+ 200722 T08 0.4+ 0.4+ 200914 130 0.1- 0.5- 200617 T03 0.3+ 0.1- 200729 A71 1.5+ 0.5- 200914 130 0.4+ 0.7+ 200618 858 0.2+ 0.3- 200730 A71 0.1+ 0.9- 200915 G96 0.5- 0.0 200618 858 0.1- 0.0 200811 T08 0.4+ 0.4+ 200915 G96 0.1+ 0.3- 200618 858 0.1- 0.1+ 200811 T08 0.6+ 0.1- 200915 G96 0.1- 0.5- 200619 Q11 0.8+ 0.2- 200811 T08 1.0+ 0.4- 200915 G96 0.1- 0.2+ ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2020 Oct. 4