Nakano Note (Nakano wa Kangaeru noda) NK 4894 P/2022 R4 (PANSTARRS)
The following improved orbital elements, by S. Nakano, are from 42 observations 2022 Sept. 2 to Nov. 27. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.38 arc second. The comet will pass 0.46 AU from Jupiter on 2040 Mar. 7 UT. See an orbit in CBET 5174. Epoch = 2022 June 30.0 TT T = 2022 July 10.41284 +/- 0.00046 (m.e.) TT Peri. = 197.44354 +/- 0.00045 Node = 176.62494 +/- 0.00026 (2000.0) Inc. = 21.02200 +/- 0.00009 q = 1.9556192 +/- 0.0000058 AU e = 0.4906314 +/- 0.0000129 a = 3.8393005 +/- 0.0000976 AU n' = 0.13101648 +/- 0.00000500 P = 7.523 +/- 0.0002869 years (+/- 0.10 day) The predicted orbit for the 2030 return is as follows: T = 2030 Jan. 15.93989 TT Epoch = 2030 Jan. 19.0 TT Peri. = 197.41020 e = 0.4895130 Node = 176.62679 (2000.0) a = 3.8438292 AU Inc. = 20.99737 n'= 0.13078500 q = 1.9622247 AU P = 7.536 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2022/ 220912 695 0.1+ 0.0 221004 L01 0.0 0.2+ 220902 F51 0.0 0.1+ 220922 F51 0.1+ 0.0 221004 L01 0.8- 0.6- 220902 F51 0.2- 0.0 220922 F51 0.0 0.1+ 221004 L01 0.0 0.2- 220902 F51 0.1- 0.2+ 220923 H06 0.1- 0.1- 221019 X03 0.2+ 0.1- 220902 F51 0.0 0.1- 220923 H06 0.5- 0.0 221019 X03 0.1+ 0.0 220903 568 0.1+ 0.0 220923 H06 0.3- 0.2- 221019 X03 0.6- 0.5+ 220903 568 0.1+ 0.0 220927 691 0.5- 0.3+ 221104 X03 1.6- 0.1- 220903 568 0.1+ 0.0 220927 691 0.3- 0.5+ 221104 X03 0.5- 0.8- 220905 A77 0.5+ 0.6- 220927 691 0.5- 0.2- 221104 X03 (4.2- 2.8-) 220905 A77 0.7- 0.0 220930 568 0.2+ 0.1+ 221126 F51 0.0 0.2- 220905 A77 (2.9- 1.8-) 220930 568 0.2+ 0.0 221126 F51 0.1+ 0.2+ 220910 F51 0.0 0.3- 220930 568 0.1+ 0.0 221126 F51 0.2+ 0.0 220910 F51 0.2+ 0.2- 221001 858 0.1- 0.2- 221127 215 (3.9- 1.0-) 220910 F51 0.2- 0.0 221001 858 0.1- 0.2- 221127 215 (2.4- 0.5-) 220912 695 0.0 0.1+ 221001 858 0.1+ 0.1+ 221127 215 1.5- 0.4- 220912 695 0.1+ 0.1+ 221004 L01 0.9- 0.8+ ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2022 Dec. 14