Nakano Note (Nakano wa Kangaeru noda) NK 4513 P/2021 J3 (ATLAS)
The following improved orbital elements, by S. Nakano, are from 102 observations 2021 May 13 to Aug. 2. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.44 arc second. The comet has passed 1.17 AU and 1.43 AU from Jupiter on 1994 Nov. 24 and 2020 Sept. 4, respectively. Also comet has passed 3.81 AU from Saturn on 2021 Aug. 4 UT. See an orbit in CBET 4974. Epoch = 2019 June 6.0 TT T = 2019 June 17.13731 +/- 0.19188 (m.e.) TT Peri. = 123.82889 +/- 0.00833 Node = 111.32800 +/- 0.00143 (2000.0) Inc. = 14.59031 +/- 0.00112 q = 4.8766703 +/- 0.0013044 AU e = 0.4364920 +/- 0.0004918 a = 8.6541273 +/- 0.0078990 AU n' = 0.03871410 +/- 0.00005300 P = 25.459 +/- 0.0348557 years (+/-12.7 days) The predicted orbit for the 2045 return is as follows: T = 2045 Nov. 23.09091 TT Epoch = 2045 Dec. 6.0 TT Peri. = 125.86608 e = 0.4483611 Node = 110.46536 (2000.0) a = 8.8483324 AU Inc. = 14.53067 n'= 0.03744656 q = 4.8810848 AU P = 26.320 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2021/ 210526 L81 0.0 0.0 210615 L27 0.1- 0.3+ 210513 T08 0.4- 0.0 210526 L81 0.2+ 0.1- 210615 L27 0.0 0.3+ 210513 T08 0.1+ 0.4+ 210526 L81 0.1+ 0.1+ 210615 L27 0.2- 0.3+ 210513 T08 0.1- 0.0 210602 G40 0.2- 0.5+ 210620 T05 0.3+ 0.7- 210513 T08 0.4+ 0.8- 210602 G40 0.6- 0.0 210620 T05 0.4- 0.2- 210514 J04 0.2- 0.1+ 210602 691 0.4- 0.7+ 210620 T05 0.2- 0.3+ 210514 J04 0.5- 0.6- 210602 691 0.2- 0.4+ 210620 T05 (3.6- 3.3+) 210514 J04 0.1+ 0.0 210602 T08 0.1+ 0.3- 210704 T08 1.8- 1.0- 210514 807 0.2+ 0.2- 210602 T08 0.1- 0.2- 210704 T08 0.2- 0.1+ 210514 807 0.1+ 0.1- 210602 T08 0.3+ 0.2- 210704 T08 1.6- 0.5- 210514 I52 0.8- 0.3- 210602 T08 0.6+ 0.6- 210704 T08 0.6- 0.5- 210514 807 0.1+ 0.1- 210603 G40 0.4- 0.2+ 210704 T08 0.3+ 0.0 210514 I52 0.1+ 0.4- 210603 G40 0.0 0.3- 210704 T08 0.4- 0.3+ 210514 I52 0.7+ 0.4- 210604 A77 0.1- 0.6+ 210704 T08 0.6- 0.4+ 210514 F51 0.0 0.0 210604 A77 0.2- 1.1+ 210704 T08 0.5+ 0.1+ 210514 F51 0.2+ 0.0 210607 Q11 0.1- 0.8+ 210713 F51 0.2+ 0.0 210514 F51 0.0 0.0 210607 Q11 0.0 0.9+ 210713 F51 0.1+ 0.1+ 210514 F51 0.2+ 0.0 210607 Q11 0.1- 0.8+ 210713 F51 0.2+ 0.0 210515 T12 0.1- 0.0 210608 Q11 0.1- 0.4+ 210713 F51 0.0 0.0 210515 T12 0.0 0.1- 210608 Q11 0.4- 0.3+ 210716 T08 0.6- 0.6- 210515 T12 0.1+ 0.1+ 210608 Q11 0.4- 0.4+ 210716 T08 0.2- 0.1+ 210515 T12 0.1+ 0.0 210611 F51 0.3+ 0.2+ 210716 T08 0.5- 0.4- 210516 I52 0.7- 0.1+ 210611 F51 0.1- 0.3- 210716 T08 0.1- 0.2+ 210516 I52 0.3+ 0.0 210611 F51 0.3+ 0.2+ 210720 T08 0.0 0.5- 210516 I52 0.5+ 0.7- 210611 F51 0.1- 0.3- 210720 T08 0.4- 0.3+ 210516 I52 0.2- 0.2+ 210612 T05 0.5+ 0.3- 210720 T08 1.1- 0.2+ 210518 E94 0.0 0.4+ 210612 T05 0.6+ 0.0 210720 T08 0.9- 0.3+ 210518 E94 0.2- 0.1+ 210612 T05 0.2- 0.8- 210730 T05 0.4- 0.7- 210518 E94 0.1- 0.1+ 210614 215 0.6- 0.1+ 210730 T05 0.2- 0.6- 210518 E94 0.0 0.3+ 210614 215 0.3- 0.2- 210730 T05 0.1+ 1.0- 210518 Q62 0.4+ 0.2- 210614 215 (2.1+ 0.1-) 210730 T05 0.5- 0.4+ 210518 Q62 0.2+ 0.1- 210614 T08 0.3+ 0.4+ 210730 T05 0.6+ 0.1+ 210519 Y00 0.1+ 0.2- 210614 T08 0.1+ 0.1- 210730 T05 0.3+ 0.4+ 210519 Y00 0.3- 0.5- 210614 T08 0.2+ 0.1+ 210802 L27 1.6+ 0.4+ 210519 Y00 0.0 0.2- 210614 T08 1.4- 1.3+ 210802 L27 0.1- 0.4+ ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2021 Aug. 16