Nakano Note (Nakano wa Kangaeru noda) NK 5202 P/Sheppard-Tholen (2006 AH2 = 2022 U6)
The following improved orbital elements, by S. Nakano, are from 61 observations 2006 to 2024. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.30 arc second. The comet has passed 1.07 AU from Saturn in 1958 October. See an orbit in CBET 5387 (same orbit). Epoch = 2023 Sept.13.0 TT T = 2023 Aug. 24.41259 +/- 0.00288 (m.e.) TT Peri. = 195.96727 +/- 0.00039 Node = 261.64856 +/- 0.00006 (2000.0) Inc. = 10.01654 +/- 0.00002 q = 3.9908604 +/- 0.0000017 AU e = 0.4170043 +/- 0.0000003 a = 6.8454372 +/- 0.0000041 AU n' = 0.05503035 +/- 0.00000005 P = 17.910 +/- 0.0000162 years T = 2005 Oct. 12.17657 TT Epoch = 2005 Sept.27.0 TT Peri. = 196.18226 e = 0.4171851 Node = 261.87312 (2000.0) a = 6.8665598 AU Inc. = 10.00693 n'= 0.05477662 q = 4.0019333 AU P = 17.993 years The predicted orbit for the 2041 return is as follows: T = 2041 July 5.57238 TT Epoch = 2041 July 20.0 TT Peri. = 196.14775 e = 0.4165610 Node = 261.67532 (2000.0) a = 6.8058935 AU Inc. = 10.03276 n'= 0.05551065 q = 3.9708234 AU P = 17.755 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2006/ 221031 F52 0.2+ 0.3+ 231221 X07 0.4- 0.3+ 060102 G96 0.1- 0.2+ 221031 F52 0.0 0.1+ 231221 X07 0.0 0.1- 060102 G96 0.1- 0.2- 221116 F52 0.3+ 0.1- 2024/ 060102 G96 0.7+ 0.3+ 221116 F52 0.3+ 0.1- 240102 F52 0.4+ 0.3- 060102 G96 0.1+ 0.1- 221116 F52 0.0 0.1- 240102 F52 0.2+ 0.2- 060104 691 0.4- 0.5+ 221116 F52 0.1+ 0.0 240102 F52 0.1+ 0.1+ 060104 691 0.9+ 0.4+ 221124 V00 0.1- 0.2- 240102 F52 0.5+ 0.1- 060104 691 0.7- 0.1+ 221124 V00 0.0 0.0 240106 F52 0.1+ 0.0 061226 T14 0.2- 0.2- 221124 V00 0.7- 0.1- 240106 F52 0.1+ 0.2- 061226 T14 0.1- 0.2- 221124 V00 0.9- 0.7- 240106 F52 0.1+ 0.2- 061226 T14 0.1+ 0.0 221217 G96 0.1+ 0.5+ 240108 O18 0.3- 0.1+ 2022/ 221217 G96 0.6- 0.4+ 240108 O18 0.1- 0.0 221019 F52 0.3- 0.0 221217 G96 0.1- 0.0 240108 O18 0.1- 0.1- 221023 F51 0.5+ 0.2+ 221217 G96 0.6+ 0.2- 240111 G96 0.1+ 0.1- 221023 F51 0.1- 0.2- 2023/ 240111 G96 0.4- 0.6+ 221023 F51 0.2+ 0.1- 231213 V00 0.5- 0.2- 240111 G96 0.3+ 0.0 221023 F51 0.1+ 0.3+ 231213 V00 0.7- 0.3+ 240111 G96 0.6- 0.1+ 221028 T09 0.0 0.0 231213 V00 0.5- 0.2+ 240203 F52 0.1+ 0.2+ 221028 T09 0.0 0.0 231213 V00 0.3- 0.1+ 240203 F52 0.2+ 0.2+ 221031 F52 0.3+ 0.1- 231216 F51 0.3+ 0.3- 240203 F52 0.3+ 0.2- 221031 F52 0.1+ 0.2+ 231216 F51 0.0 0.2- 240203 F52 0.2+ 0.0 221031 F52 0.1- 0.1+ 231216 F51 0.0 0.0 ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2024 Apr. 23