Nakano Note (Nakano wa Kangaeru noda) NK 4563 P/2021 L2 (Leonard)
The following improved orbital elements, by S. Nakano, are from 126 observations 2021 May 11 to Oct. 27. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.52 arc second. See the previous orbits in CBET 4984 and NK 4547. Epoch = 2021 July 5.0 TT T = 2021 July 24.55147 +/- 0.00177 (m.e.) TT Peri. = 51.53978 +/- 0.00091 Node = 266.67737 +/- 0.00018 (2000.0) Inc. = 21.06954 +/- 0.00009 q = 1.9385492 +/- 0.0000052 AU e = 0.5217371 +/- 0.0000074 a = 4.0533127 +/- 0.0000633 AU n' = 0.12077830 +/- 0.00000283 P = 8.160 +/- 0.0001912 years (+/- 0.07 day) The predicted orbit for the 2029 return is as follows: T = 2029 Sept. 8.55415 TT Epoch = 2029 Sept.21.0 TT Peri. = 52.06530 e = 0.5239404 Node = 266.18451 (2000.0) a = 4.0347995 AU Inc. = 21.06707 n'= 0.12161052 q = 1.9208050 AU P = 8.105 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2021/ 210618 F51 0.2+ 0.5+ 210731 W62 0.0 1.7- 210511 G96 0.3+ 0.4- 210618 L01 0.5- 0.1- 210731 W62 0.9+ 1.2- 210511 G96 0.6+ 0.0 210618 L01 0.1+ 0.5+ 210731 W62 0.1+ 1.4- 210511 G96 0.8- 0.7- 210618 L01 0.2+ 0.8+ 210809 X03 0.5- 0.3- 210513 F51 0.3+ 0.3+ 210619 L01 0.5+ 0.1- 210809 X03 0.4- 0.5- 210513 F51 0.2+ 0.3+ 210619 L01 0.2+ 0.3+ 210809 X03 0.6- 1.1- 210513 F51 0.3+ 0.1+ 210619 L01 0.2+ 0.7+ 210809 T05 0.6+ 1.1+ 210608 G96 0.3- 0.1+ 210619 204 0.3- 0.5- 210809 T05 0.7+ 0.7+ 210608 G96 0.1+ 0.2- 210619 204 0.0 0.1+ 210809 T05 0.7- 0.5- 210608 G96 0.2- 0.3+ 210619 658 0.2- 0.3- 210809 T05 0.4- 0.2+ 210608 G96 0.1- 0.1- 210619 658 0.2- 0.2- 210811 A71 0.7+ 0.7- 210608 G96 0.1+ 0.1+ 210619 658 0.2- 0.3- 210811 A71 0.7+ 1.2- 210608 G96 0.3- 0.0 210619 658 0.3- 0.3- 210811 A71 0.7+ 1.0- 210608 G96 0.0 0.0 210620 N51 1.0+ 0.2+ 210811 A71 (3.3+ 3.1-) 210608 G96 0.1+ 0.4- 210620 N51 0.8+ 0.2+ 210906 G96 0.0 0.1- 210609 L01 0.6+ 0.5+ 210621 L81 0.2+ 0.4+ 210906 G96 0.2- 0.0 210609 L01 0.9+ 0.2- 210621 L81 0.2+ 0.2+ 210906 G96 0.3- 0.0 210609 L01 0.5- 0.6- 210621 L81 0.4- 0.4+ 210906 G96 0.3- 0.2+ 210609 691 0.7+ 0.3+ 210705 A77 0.1+ 0.9+ 210909 F52 0.4- 0.6+ 210609 691 0.5- 0.6- 210706 A77 0.3- 1.6+ 210909 F52 0.4- 0.6+ 210609 691 0.2+ 0.3- 210706 215 0.1- 0.8- 210909 F52 0.4- 0.5+ 210611 Z84 0.0 0.1+ 210706 215 0.9- 1.2- 210912 W62 0.2+ 0.8+ 210611 Z84 0.1+ 0.2+ 210706 215 0.4- 0.3- 210912 W62 0.3+ 0.6+ 210611 Z84 0.0 0.1+ 210707 I41 0.1+ 0.1+ 210912 W62 1.1- 0.6+ 210613 204 0.1- 0.2+ 210707 I41 0.2+ 0.1+ 210929 A77 0.1+ 0.1+ 210613 204 0.2+ 0.5- 210711 I41 0.3- 0.3+ 210929 A77 0.8+ 0.6- 210613 Q62 0.3- 0.1+ 210711 I41 0.4- 0.0 211009 A77 0.4+ 0.1- 210613 Q62 0.4- 0.1- 210713 I41 0.0 0.3+ 211009 A77 0.2+ 0.1- 210614 L06 0.7+ 0.7+ 210713 I41 0.2- 0.2+ 211010 867 0.8+ 0.2- 210614 L06 0.7+ 0.1+ 210713 I41 0.2+ 0.0 211010 867 0.5- 0.6+ 210614 587 0.3- 0.6- 210715 I41 0.4- 0.3- 211010 867 0.4+ 0.3- 210614 587 0.4- 0.5- 210715 I41 0.1- 0.2+ 211010 867 0.4- 1.4- 210615 L27 0.4+ 1.1- 210715 I41 0.0 0.0 211014 F52 0.4- 0.3+ 210615 L27 0.2- 0.5- 210715 I41 0.3+ 0.3+ 211014 F52 0.2- 0.1+ 210615 L27 0.4- 0.0 210716 X03 0.7- 0.6+ 211014 F52 0.3- 0.3+ 210616 L27 1.9- 0.1+ 210716 X03 0.0 0.5- 211014 F52 0.5- 0.2+ 210616 L27 0.3- 0.6- 210716 X03 0.2+ 0.3- 211016 G96 0.5+ 0.2- 210618 W62 0.0 0.4- 210717 941 0.2- 0.4+ 211016 G96 0.0 0.6- 210618 W62 0.2+ 0.3- 210717 941 0.2- 0.0 211016 G96 0.6- 0.5+ 210618 W62 0.2+ 0.3+ 210717 941 0.3+ 0.3+ 211016 G96 0.2- 0.1+ 210618 F51 0.3+ 0.3+ 210718 A77 0.1+ 1.5+ 211027 867 0.0 0.2+ 210618 F51 0.1+ 0.2+ 210718 A77 0.3- 1.2+ 211027 867 1.8+ 0.4- 210618 F51 0.2+ 0.4+ 210718 A77 0.0 1.3+ 211027 867 (2.2+ 0.7-) ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2021 Nov. 16