Nakano Note (Nakano wa Kangaeru noda) NK 4463 C/2021 A9 (PANSTARRS)
The following improved orbital elements, by S. Nakano, are from 78 observations 2020 Dec. 12 to 2021 Apr. 12. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.36 arc second. If future observations are reported, (1/a)org. will be turned to plus. The comet will pass 3.64 AU from Jupiter on 2024 Dec. 18 and 4.28 AU from Saturn on 2027 Dec. 16 UT. See an orbit in CBET 4922. Epoch = 2023 Dec. 2.0 TT T = 2023 Dec. 1.72953 +/- 0.25706 (m.e.) TT Peri. = 211.46614 +/- 0.01343 Node = 314.83170 +/- 0.00220 (2000.0) Inc. = 158.01710 +/- 0.00182 q = 7.7599736 +/- 0.0007227 AU e = 1.0018294 +/- 0.0005796 1/a = -0.0002357 +/- 0.0000747 1/AU origin = -0.000053 (Q= 6) future = -0.000057 The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2020/ 210115 N51 0.4- 0.1- 210211 F52 0.0 0.1- 201212 G96 0.3- 0.5- 210115 N51 0.2- 0.3- 210211 F52 0.2- 0.3- 201212 G96 0.6+ 0.2- 210115 N51 0.1- 0.2+ 210211 F52 0.2- 0.0 201212 G96 0.6- 1.3+ 210116 L01 1.0+ 0.4- 210211 568 0.2- 0.2- 201224 F52 0.7- 0.3+ 210116 L01 0.4+ 0.1- 210211 568 0.2- 0.2- 201224 F52 0.0 0.0 210116 E10 0.1- 0.7+ 210211 568 0.3- 0.2- 2021/ 210116 E10 0.0 0.0 210212 568 0.3- 0.2- 210109 G96 0.2+ 1.2+ 210116 E10 0.5+ 0.6+ 210212 568 0.2- 0.2- 210109 G96 0.3+ 0.3+ 210117 H06 0.2+ 0.3- 210212 568 0.3- 0.2- 210109 G96 0.2- 0.3- 210117 H06 0.4+ 0.4- 210214 215 0.5+ 0.0 210109 G96 0.8- 0.1- 210118 G96 0.0 0.1+ 210214 215 0.2+ 0.2+ 210112 F51 0.0 0.0 210118 G96 0.1+ 0.1- 210214 215 0.1- 0.2+ 210112 F51 0.0 0.1- 210118 G96 0.2+ 0.3+ 210306 A71 0.2- 0.1- 210112 F51 0.1+ 0.1- 210118 G96 0.1+ 0.0 210306 A71 0.7- 0.1- 210112 F51 0.1+ 0.0 210205 G96 0.2- 0.3+ 210318 G96 0.3+ 0.6- 210113 I52 0.0 0.7- 210205 G96 0.0 0.2+ 210318 G96 0.0 0.3- 210113 I52 0.3+ 0.2- 210205 G96 0.5+ 0.3- 210318 G96 0.4+ 0.2- 210113 I52 0.3+ 0.1+ 210205 G96 0.1- 0.1+ 210318 G96 0.3- 0.0 210114 H21 0.3+ 0.1- 210208 F51 0.3- 0.2- 210405 G96 0.4- 0.2- 210114 H21 0.7+ 0.4+ 210208 F51 0.1- 0.0 210405 G96 0.2+ 0.4- 210114 H21 0.7+ 0.2+ 210208 F51 0.2+ 0.2- 210405 G96 0.2- 0.3- 210115 568 0.2- 0.1- 210208 F51 0.3- 0.3- 210405 G96 0.0 0.7- 210115 568 0.2- 0.1- 210211 F52 0.1- 0.2- 210411 X03 0.1+ 0.0 210115 568 0.2- 0.0 210211 F52 0.1- 0.3- 210411 X03 0.2+ 1.2+ 210115 N51 0.1- 0.3+ 210211 F52 0.3- 0.1- 210412 X03 0.4+ 1.1+ 210115 N51 0.2- 0.1+ 210211 F52 0.0 0.1- 210412 X03 0.3+ 1.2+ 210115 N51 0.3- 0.0 210211 F52 0.1- 0.1+ ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2021 May 14