Nakano Note (Nakano wa Kangaeru noda) NK 4923 P/Lemmon-PANSTARRS (2020 O1 = 2016 Nx)
The following improved orbital elements, by S. Nakano, are from 91 observations 2016 to 2021. 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. 2016 observations show the residual of -35" for Right Ascension and -10" for Declination from an orbit in NK 4860 with the delta-T correction = +0.03 day. No close approach to Major planets. See the previous orbits in CBET 4820, NK 4225 and NK 4860. This result are confirmed that one night obseravtions made on 2021 July using Hubble Space telescope are correct. Epoch = 2020 Apr. 21.0 TT T = 2020 May 4.24039 +/- 0.00189 (m.e.) TT Peri. = 104.94152 +/- 0.00073 Node = 176.01149 +/- 0.00018 (2000.0) Inc. = 5.22214 +/- 0.00002 q = 2.3293080 +/- 0.0000088 AU e = 0.1198137 +/- 0.0000031 a = 2.6463807 +/- 0.0000137 AU n' = 0.22894206 +/- 0.00000178 P = 4.305 +/- 0.0000334 years T = 2016 Jan. 15.33940 TT Epoch = 2016 Jan. 13.0 TT Peri. = 105.08460 e = 0.1185305 Node = 176.05154 (2000.0) a = 2.6453367 AU Inc. = 5.22248 n'= 0.22907761 q = 2.3317835 AU P = 4.303 years The predicted orbit for the 2024 return is as follows: T = 2024 Aug. 20.31462 TT Epoch = 2024 Sept. 7.0 TT Peri. = 104.38178 e = 0.1185968 Node = 175.96804 (2000.0) a = 2.6458449 AU Inc. = 5.22506 n'= 0.22901161 q = 2.3320561 AU P = 4.304 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2016/ 200722 673 0.9- 0.6- 200730 X02 0.2- 0.1- 160703 T09 0.0 0.0 200722 L07 0.2- 0.3+ 200730 246 0.4+ 0.2- 160703 T09 0.0 0.1+ 200722 L07 0.9- 0.1+ 200730 246 0.1+ 0.9- 160703 T09 0.0 0.1- 200723 G40 0.4- 0.3+ 200730 246 0.1- 0.8- 160703 T09 0.1+ 0.2+ 200723 G40 0.3- 0.3- 200801 H36 0.2- 0.1- 160801 T09 0.2- 0.2- 200723 673 0.2+ 0.6+ 200801 H36 0.8+ 0.5+ 160801 T09 0.0 0.2- 200723 673 0.2+ 0.0 200801 H36 0.1- 0.7+ 2020/ 200723 673 0.0 0.4+ 200808 215 0.1- 1.2+ 200627 F51 0.0 0.1+ 200723 Q62 0.2- 0.2- 200808 215 0.0 0.1+ 200627 F51 0.2- 0.3+ 200723 Q62 0.4- 0.1- 200808 215 0.5- 0.7+ 200627 F51 0.2+ 0.0 200725 204 1.4- 0.1- 200812 568 0.3+ 0.1+ 200627 F51 0.3- 0.0 200725 204 0.8- 0.4- 200812 568 0.3+ 0.1+ 200719 G96 0.2- 0.9- 200725 F52 0.1+ 0.2- 200816 F52 0.4+ 0.0 200719 G96 0.2+ 0.0 200725 F52 0.1- 0.1+ 200816 F52 0.5+ 0.0 200719 G96 1.0- 0.1- 200725 F52 0.2- 0.0 200816 F52 0.2+ 0.0 200719 G96 0.8- 0.8- 200725 L01 0.6- 0.5- 200816 F52 0.6+ 0.2+ 200720 F51 0.2- 0.1- 200725 L01 0.7- 0.4- 200823 F52 0.4+ 0.3+ 200720 F51 0.1- 0.0 200725 L01 0.9- 0.3- 200823 F52 0.1+ 0.1- 200720 F51 0.0 0.1- 200726 K63 0.4+ 0.5- 200823 F52 0.6+ 0.3+ 200720 F51 0.1- 0.1- 200726 K63 0.0 0.8- 200823 F52 0.1+ 0.0 200720 J04 0.7- 0.3- 200726 K63 0.2- 0.6- 200914 F51 0.2- 0.1+ 200720 J04 0.3- 0.3- 200727 204 1.2- 0.6- 200914 F51 0.1- 0.0 200720 J04 0.3- 0.3- 200728 204 1.5- 0.5- 200914 F51 0.2- 0.3+ 200721 I93 1.3- 0.6- 200728 X02 0.6- 0.2- 2021/ 200721 I93 0.8- 0.3- 200728 X02 0.3+ 0.0 210722 250 0.2+ 0.3+ 200721 568 0.2+ 0.1+ 200728 X02 1.1- 0.7- 210722 250 0.2- 0.1- 200721 568 0.2+ 0.1+ 200728 X02 0.2- 0.5- 210722 250 0.4+ 0.1+ 200721 568 0.2+ 0.1+ 200729 F51 0.1+ 0.0 210722 250 0.2- 0.1- 200721 E94 1.3- 0.2- 200729 F51 0.1+ 0.0 210722 250 0.1+ 0.1+ 200721 E94 1.9- 1.2- 200729 F51 0.1+ 0.1- 210722 250 0.2- 0.3- 200722 673 1.0- 0.1- 200729 F51 0.1+ 0.0 200722 673 0.2- 0.7+ 200730 X02 0.3- 0.3- ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2023 Jan. 29