Nakano Note (Nakano wa Kangaeru noda) NK 4987 P/2022 BV9 (Lemmon)
The following improved orbital elements, by S. Nakano, are from 98 observations 2021 Feb. 6 to 2023 Apr. 11. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.56 arc second. The comet has passed 0.45 AU from Jupiter on 2016 Jan. 18 UT. See an orbit in CBET 5251 (same orbit). Epoch = 2020 Nov. 7.0 TT T = 2020 Oct. 22.78897 +/- 0.01437 (m.e.) TT Peri. = 15.96186 +/- 0.00262 Node = 337.29074 +/- 0.00022 (2000.0) Inc. = 11.93459 +/- 0.00003 q = 3.3328512 +/- 0.0000290 AU e = 0.2352810 +/- 0.0000060 a = 4.3582691 +/- 0.0000509 AU n' = 0.10832608 +/- 0.00000190 P = 9.099 +/- 0.0001595 years (+/- 0.06 day) The predicted orbit for the 2029 return is as follows: T = 2029 Dec. 4.09896 TT Epoch = 2029 Dec. 10.0 TT Peri. = 15.94423 e = 0.2337429 Node = 337.30177 (2000.0) a = 4.3747071 AU Inc. = 11.91799 n'= 0.10771609 q = 3.3521504 AU P = 9.150 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2021/ 220131 691 0.8- 0.2+ 221224 V00 0.4- 0.1+ 210206 I41 0.0 0.0 220131 691 0.3- 0.3+ 221229 D29 2.0- 0.4- 210206 I41 0.2- 0.4+ 220131 691 0.3- 0.2+ 221229 D29 0.3- 0.4+ 210206 I41 0.0 0.6+ 220131 Z33 0.1+ 0.1- 221230 D29 (3.4- 0.3+) 210207 I41 0.3+ 0.2- 220131 K78 0.2- 0.1- 221230 D29 1.5- 0.0 210207 I41 0.4- 0.3+ 220131 K78 0.2+ 0.8+ 221230 D29 1.7- 0.2- 210207 I41 0.2- 0.3- 220131 Z33 0.1- 0.5- 221230 D29 (2.4- 0.6+) 210208 I41 0.1+ 0.0 220201 958 0.3+ 1.3- 221230 D29 (3.1- 0.7-) 210208 I41 0.3+ 0.0 220201 958 0.9+ 0.1- 221231 D29 (2.6- 1.8+) 210208 I41 0.3- 0.3+ 220201 U52 0.2+ 0.7- 221231 D29 1.6- 0.3+ 210208 I41 0.1- 0.4+ 220201 U52 0.6+ 0.1- 2023/ 210211 I41 0.7- 0.3+ 220201 U52 (2.4- 1.5+) 230114 F52 0.5+ 0.2+ 210211 I41 0.2- 0.5+ 220201 K19 1.1- 0.5- 230114 F52 0.0 0.3+ 210211 I41 0.1- 0.6+ 220201 K19 0.5- 1.0- 230114 F52 0.6+ 0.1+ 2022/ 220201 K63 0.9- 0.9- 230114 F52 0.3+ 0.2+ 220130 G96 0.2- 0.5- 220201 K63 0.1- 0.4+ 230120 F52 0.3+ 0.3+ 220130 G96 0.1- 0.2- 220202 654 0.1- 0.0 230120 F52 0.1- 0.1+ 220130 G96 0.2- 0.3- 220202 654 1.2- 1.7+ 230120 F52 0.3+ 0.1- 220130 G96 0.2- 0.2- 220202 654 0.2- 0.1- 230120 F52 0.0 0.2+ 220130 I52 0.2- 0.5- 220202 654 0.3- 0.1- 230124 F52 0.2+ 0.1+ 220130 I52 0.1+ 0.2- 220204 204 0.2- 0.1+ 230124 F52 0.1+ 0.0 220130 I52 0.6- 0.9- 220204 204 0.1- 0.1+ 230124 F52 0.0 0.2- 220130 C95 0.2+ 1.6+ 220314 G96 0.2+ 0.5- 230124 D29 1.7- 0.0 220130 C95 0.3+ 2.0+ 220314 G96 0.3- 0.6- 230124 D29 (3.0- 0.0 ) 220130 L01 0.3+ 0.5- 220314 G96 0.2- 0.1- 230124 D29 (4.3- 0.5-) 220130 L01 0.2+ 0.2- 220314 G96 0.5+ 0.1- 230125 703 0.3+ 1.5- 220130 L01 0.2+ 0.1- 220418 I41 0.0 0.0 230125 703 1.1- 0.3- 220130 L01 0.2+ 0.4- 220418 I41 0.0 0.2- 230125 703 (2.1- 0.3-) 220130 L01 0.3+ 0.2- 220419 I41 0.4+ 0.1- 230125 703 (2.6- 0.3-) 220130 J57 0.3- 0.0 220419 I41 0.0 0.4+ 230408 204 1.3- 1.3+ 220130 J57 0.0 0.1- 220419 I41 0.2+ 0.1- 230408 204 1.2- 0.8+ 220130 J57 0.0 0.3- 221215 F51 0.7+ 0.1+ 230409 A77 0.3- 0.3- 220131 V41 1.1+ 0.8- 221215 F51 0.5+ 0.0 230409 A77 0.2+ 0.4- 220131 V41 (1.1+ 2.2+) 221215 F51 0.3+ 0.1+ 230409 A77 1.2+ 0.2- 220131 654 0.1+ 0.2- 221215 F51 0.3+ 0.1+ 230411 U94 0.4- 0.7+ 220131 V41 (1.2+ 2.1-) 221224 V00 0.5- 0.0 230411 U94 0.7- 0.7+ 220131 654 0.2- 0.2- 221224 V00 0.7- 0.1+ 220131 654 0.2- 0.3- 221224 V00 0.5- 0.1+ ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2023 Apr. 13