Nakano Note (Nakano wa Kangaeru noda) NK 3985 P/2015 T3 (PANSTARRS)
The following improved orbital elements, by S. Nakano, are from 38 observations 2015 Oct. 13 to Oct. 16. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.49 arc second. Note the predicted T in 2023 is uncertainty by a half year. Epoch = 2015 Apr. 8.0 TT T = 2015 Mar. 21.81119 +/- 4.68939 (m.e.) TT Peri. = 198.76192 +/- 1.34613 Node = 119.97434 +/- 0.55515 (2000.0) Inc. = 12.07440 +/- 0.05666 q = 2.1551138 +/- 0.0265898 AU e = 0.4650644 +/- 0.0192004 a = 4.0287350 +/- 0.1529555 AU n' = 0.12188522 +/- 0.00693892 P = 8.086 +/- 0.4605427 years (+/- 168 days) The predicted orbit for the 2023 return is as follows: T = 2023 Apr. 16.05498 TT Epoch = 2023 Apr. 6.0 TT Peri. = 198.84124 e = 0.4668107 Node = 119.95217 (2000.0) a = 4.0143338 AU Inc. = 12.09050 n'= 0.12254169 q = 2.1403997 AU P = 8.043 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2015/ 151014 474 0.2+ 0.2- 151015 291 0.8- 0.2- 151013 F51 0.1+ 0.0 151014 474 0.5+ 0.0 151015 291 0.4- 0.3+ 151013 F51 0.1+ 0.1- 151014 474 0.4+ 0.0 151015 F51 0.0 0.1- 151013 F51 0.1- 0.0 151014 Q62 0.4+ 1.3+ 151015 F51 0.3- 0.2- 151013 F51 0.0 0.1- 151014 Q62 0.2+ 1.1+ 151015 F51 0.0 0.2- 151014 291 0.1- 0.4+ 151014 Q62 0.3+ 0.9+ 151015 474 0.7+ 0.4+ 151014 291 1.7- 0.3+ 151014 958 0.7- 0.6+ 151015 474 0.1+ 0.0 151014 568 0.0 0.1- 151014 958 0.5+ 1.1+ 151015 F51 0.0 0.1- 151014 568 0.2- 0.1- 151014 958 0.2- 0.0 151015 474 0.2+ 0.1+ 151014 568 0.2- 0.1- 151015 W96 1.3- 1.0+ 151015 474 1.3+ 0.1+ 151014 Q62 1.2+ 1.6+ 151015 W96 0.5+ 0.6+ 151016 W96 0.3- 0.3- 151014 Q62 1.3+ 1.2+ 151015 W96 (1.4- 3.2-) 151016 W96 1.6+ 0.4- 151014 Q62 1.2+ 1.1+ 151015 W96 0.7+ 0.8+ 151014 474 0.2+ 0.3- 151015 291 0.3- 0.5+ ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2019 Dec. 18