Nakano Note (Nakano wa Kangaeru noda) NK 4360 C/2020 U3 (Rankin)
The following improved orbital elements, by S. Nakano, are from 105 observations 2020 July 21 to 2021 Jan. 1. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.31 arc second. The comet has passed 2.01 AU from Saturn on 2018 Mar. 21 and 3.23 AU from Jupiter on 2019 Dec. 27 UT. See the previous orbits in CBET 4879 (= NK 4231) and NK 4311. Epoch = 2021 Jan. 26.0 TT T = 2021 Feb. 5.97735 +/- 0.00057 (m.e.) TT Peri. = 124.26325 +/- 0.00052 Node = 282.67874 +/- 0.00013 (2000.0) Inc. = 30.17694 +/- 0.00003 q = 2.2761751 +/- 0.0000095 AU e = 0.9648034 +/- 0.0000081 1/a = +0.0154631 +/- 0.0000036 1/AU a = 64.67 AU P = 520.1 years origin = +0.015487 (Q= 8) future = +0.015169 The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2020/ 200928 G96 0.2+ 0.1- 201023 I52 0.0 0.4+ 200721 F51 0.0 0.0 200928 G96 0.1- 0.3- 201023 H06 0.1- 0.1- 200721 F51 0.0 0.3+ 200928 G96 0.1+ 0.2- 201023 H06 0.1- 0.1- 200721 F51 0.2+ 0.2+ 200928 G96 0.5+ 0.0 201023 Z08 0.2- 0.1- 200731 F51 0.1+ 0.1+ 201004 F52 0.0 0.1+ 201023 Z08 0.2- 0.3+ 200731 F51 0.3+ 0.0 201004 F52 0.1- 0.0 201023 Z08 0.3- 0.2+ 200731 F51 0.1- 0.0 201004 F52 0.0 0.2- 201023 Z08 0.4- 0.2- 200731 F51 0.1+ 0.1+ 201004 F52 0.0 0.2+ 201024 F51 0.1+ 0.3+ 200804 F51 0.1- 0.1+ 201005 G96 0.5- 0.1+ 201024 F51 0.1- 0.0 200804 F51 0.1- 0.0 201005 G96 0.5- 1.0+ 201024 F51 0.1- 0.0 200804 F51 0.2+ 0.3- 201005 G96 0.4+ 0.6+ 201024 N51 0.7+ 0.1- 200804 F51 0.2+ 0.0 201005 G96 0.1- 0.4+ 201024 N51 0.8+ 0.2- 200807 F52 0.0 0.1+ 201011 G96 0.1+ 0.3- 201024 N51 0.8+ 0.4+ 200807 F52 0.1+ 0.2- 201011 G96 0.2+ 0.1- 201024 N51 0.8+ 0.1- 200809 F51 0.1+ 0.2- 201011 G96 0.0 0.1- 201024 N51 0.7+ 0.3- 200809 F51 0.2- 0.1- 201011 G96 0.2+ 0.2- 201024 K61 1.4+ 0.6- 200815 F52 0.1- 0.2- 201014 F51 0.1- 0.0 201024 K61 0.5+ 0.4- 200827 F52 0.6- 0.4- 201014 F51 0.1+ 0.1- 201027 L01 0.0 0.3- 200829 F51 0.1- 0.0 201014 F51 0.2- 0.1+ 201027 L01 0.0 0.4- 200830 F51 0.1- 0.0 201022 G96 0.3+ 0.3- 201027 L01 0.3- 0.5- 200830 F51 0.2- 0.2- 201022 G96 0.1+ 0.1- 201108 568 0.2- 0.1+ 200830 F51 0.1+ 0.1+ 201022 G96 0.1- 0.0 201108 568 0.2- 0.1+ 200830 F51 0.0 0.1- 201022 G96 0.1+ 0.4- 201113 G96 0.7+ 0.2- 200902 F51 0.0 0.1+ 201022 I52 0.0 0.0 201113 G96 0.4+ 0.1- 200902 F51 0.2+ 0.2+ 201022 I52 0.0 0.0 201113 G96 0.3+ 0.1+ 200916 G96 0.2- 0.3+ 201022 I52 0.3+ 0.6- 201114 215 0.4+ 0.2+ 200916 G96 0.0 0.1- 201022 I52 0.0 0.4- 201114 215 0.4+ 0.0 200916 G96 0.1+ 0.0 201022 L01 0.1+ 0.1- 201114 215 0.7+ 0.4- 200916 G96 0.0 0.1- 201022 B96 0.6+ 1.0- 201204 H06 0.2+ 0.0 200921 W16 0.3+ 0.3+ 201022 L01 0.4+ 0.5- 201204 H06 0.1- 0.1- 200921 W16 0.3- 0.2+ 201022 B96 0.1- 0.6- 201204 H06 0.0 0.0 200921 W16 1.0- 0.3- 201022 L01 0.3+ 0.5- 2021/ 200922 F51 0.1+ 0.1+ 201022 B96 0.5+ 1.2- 210101 H06 0.1- 0.1- 200922 F51 0.1- 0.0 201023 I52 0.1- 0.4- 210101 H06 0.2+ 0.1+ 200922 F51 0.0 0.0 201023 I52 0.0 0.1- 210101 H06 0.1+ 0.0 200922 F51 0.0 0.2+ 201023 I52 0.1+ 0.1- ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2021 Jan. 9