Nakano Note (Nakano wa Kangaeru noda) NK 4547 P/2021 L2 (Leonard)
The following improved orbital elements, by S. Nakano, are from 102 observations 2021 May 11 to Sept. 9. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.47 arc second. See an orbit in CBET 4984. Epoch = 2021 July 5.0 TT T = 2021 July 24.55138 +/- 0.00160 (m.e.) TT Peri. = 51.53940 +/- 0.00087 Node = 266.67778 +/- 0.00024 (2000.0) Inc. = 21.06974 +/- 0.00012 q = 1.9385558 +/- 0.0000066 AU e = 0.5217432 +/- 0.0000083 a = 4.0533784 +/- 0.0000715 AU n' = 0.12077536 +/- 0.00000320 P = 8.161 +/- 0.0002159 years (+/- 0.08 day) The predicted orbit for the 2029 return is as follows: T = 2029 Sept. 8.62496 TT Epoch = 2029 Sept.21.0 TT Peri. = 52.06509 e = 0.5239468 Node = 266.18476 (2000.0) a = 4.0348615 AU Inc. = 21.06727 n'= 0.12160772 q = 1.9208087 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/ 210616 L27 1.9- 0.1+ 210713 I41 0.1+ 0.2+ 210511 G96 0.1+ 0.4- 210616 L27 0.4- 0.6- 210713 I41 0.1- 0.1+ 210511 G96 0.4+ 0.0 210618 W62 0.0 0.5- 210713 I41 0.3+ 0.0 210511 G96 1.1- 0.6- 210618 W62 0.2+ 0.3- 210715 I41 0.3- 0.4- 210513 F51 0.1+ 0.4+ 210618 W62 0.2+ 0.3+ 210715 I41 0.0 0.1+ 210513 F51 0.0 0.4+ 210618 F51 0.3+ 0.3+ 210715 I41 0.1+ 0.1- 210513 F51 0.1+ 0.2+ 210618 F51 0.1+ 0.2+ 210715 I41 0.4+ 0.2+ 210608 G96 0.4- 0.1+ 210618 F51 0.2+ 0.4+ 210716 X03 0.6- 0.5+ 210608 G96 0.0 0.2- 210618 F51 0.2+ 0.5+ 210716 X03 0.2+ 0.6- 210608 G96 0.2- 0.3+ 210618 L01 0.5- 0.2- 210716 X03 0.3+ 0.4- 210608 G96 0.2- 0.1- 210618 L01 0.1+ 0.5+ 210717 941 0.1- 0.3+ 210608 G96 0.0 0.1+ 210618 L01 0.2+ 0.7+ 210717 941 0.1- 0.1- 210608 G96 0.4- 0.0 210619 L01 0.5+ 0.1- 210717 941 0.4+ 0.2+ 210608 G96 0.0 0.0 210619 L01 0.2+ 0.3+ 210718 A77 0.2+ 1.4+ 210608 G96 0.0 0.4- 210619 L01 0.2+ 0.7+ 210718 A77 0.2- 1.1+ 210609 L01 0.5+ 0.5+ 210619 204 0.3- 0.5- 210718 A77 0.1+ 1.2+ 210609 L01 0.8+ 0.2- 210619 204 0.0 0.1+ 210809 X03 0.3- 0.6- 210609 L01 0.5- 0.6- 210619 658 0.2- 0.3- 210809 X03 0.3- 0.8- 210609 691 0.6+ 0.3+ 210619 658 0.2- 0.2- 210809 X03 0.5- 1.3- 210609 691 0.6- 0.6- 210619 658 0.2- 0.3- 210809 T05 0.8+ 0.9+ 210609 691 0.1+ 0.3- 210619 658 0.3- 0.3- 210809 T05 0.8+ 0.5+ 210611 Z84 0.1- 0.1+ 210620 N51 1.0+ 0.2+ 210809 T05 0.5- 0.8- 210611 Z84 0.1+ 0.2+ 210620 N51 0.8+ 0.2+ 210809 T05 0.2- 0.0 210611 Z84 0.1- 0.1+ 210621 L81 0.2+ 0.4+ 210811 A71 0.9+ 0.9- 210613 204 0.1- 0.2+ 210621 L81 0.2+ 0.2+ 210811 A71 0.9+ 1.4- 210613 204 0.2+ 0.5- 210621 L81 0.3- 0.3+ 210811 A71 0.9+ 1.3- 210613 Q62 0.3- 0.1+ 210705 A77 0.2+ 0.8+ 210811 A71 (3.5+ 3.3-) 210613 Q62 0.4- 0.0 210706 A77 0.2- 1.6+ 210906 G96 0.2+ 0.5- 210614 L06 0.7+ 0.7+ 210706 215 0.0 0.9- 210906 G96 0.1+ 0.4- 210614 L06 0.7+ 0.1+ 210706 215 0.8- 1.2- 210906 G96 0.0 0.4- 210614 587 0.4- 0.6- 210706 215 0.3- 0.3- 210906 G96 0.0 0.3- 210614 587 0.4- 0.5- 210707 I41 0.2+ 0.0 210909 F52 0.0 0.1+ 210615 L27 0.3+ 1.1- 210707 I41 0.2+ 0.0 210909 F52 0.1- 0.1+ 210615 L27 0.2- 0.5- 210711 I41 0.2- 0.2+ 210909 F52 0.2- 0.1+ 210615 L27 0.4- 0.0 210711 I41 0.3- 0.1- ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2021 Sept. 27