Nakano Note (Nakano wa Kangaeru noda) NK 3694 P/2017 X1 (PANSTARRS)
The following improved orbital elements, by S. Nakano, are from 70 observations 2017 Dec. 12 to 2018 July 17. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.26 arc second. See the previous orbit in NK 3593. Epoch = 2018 June 11.0 TT T = 2018 June 14.50737 +/- 0.02125 (m.e.) TT Peri. = 283.11402 +/- 0.00287 Node = 251.12722 +/- 0.00017 (2000.0) Inc. = 31.31095 +/- 0.00002 q = 4.6625818 +/- 0.0000258 AU e = 0.8511112 +/- 0.0000115 a = 31.3158674 +/- 0.0024173 AU n' = 0.00562416 +/- 0.00000065 P = 175.245 +/- 0.0202908 years (+/- 7.41 days) The predicted orbit for the 2191 return is as follows: T = 2191 May 16.80776 TT Epoch = 2191 May 15.0 TT Peri. = 283.08888 e = 0.8522342 Node = 251.01081 (2000.0) a = 31.5508534 AU Inc. = 31.30359 n'= 0.00556144 q = 4.6621371 AU P = 177.222 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2017/ 171215 I52 0.6- 0.7- 180211 474 0.2- 0.0 171212 F51 0.1+ 0.1+ 171215 I52 0.4- 0.6- 180211 474 0.1- 0.1+ 171212 F51 0.2- 0.0 171215 I52 0.2- 1.2- 180211 474 0.0 0.0 171212 F51 0.0 0.0 171216 I52 0.5- 0.4+ 180213 474 0.0 0.0 171212 F51 0.2- 0.0 171216 I52 0.2+ 0.4+ 180213 474 0.1- 0.1+ 171213 568 0.0 0.1- 171216 I52 0.8+ 0.3+ 180213 474 0.1- 0.1+ 171213 568 0.0 0.1- 171216 691 0.6+ 0.5+ 180310 474 0.1- 0.0 171213 568 0.0 0.1- 171216 691 0.3+ 0.5+ 180310 474 0.2- 0.1+ 171214 I52 0.0 0.2+ 171216 691 0.2- 0.4+ 180310 474 0.0 0.1- 171214 I52 0.4- 0.1+ 171219 691 0.2+ 0.2+ 180406 215 0.1+ 0.0 171214 I52 0.0 0.1+ 171219 691 0.4- 0.3+ 180406 215 0.4- 1.1+ 171214 I52 0.2- 0.1+ 171219 691 0.1- 0.2+ 180406 215 (0.3- 2.2+) 171214 Q62 0.3- 0.0 2018/ 180413 474 0.2- 0.1- 171214 Q62 0.4- 0.2+ 180103 F51 0.0 0.1+ 180413 474 0.2- 0.0 171214 Q62 0.4- 0.2+ 180103 F51 0.0 0.1+ 180413 474 0.1+ 0.0 171215 807 0.2- 0.2- 180103 F51 0.1- 0.1+ 180607 474 0.1+ 0.1- 171215 807 0.1- 0.0 180103 F51 0.3+ 0.2- 180607 474 0.0 0.1- 171215 807 0.1- 0.0 180103 F51 0.1+ 0.2- 180607 474 0.1+ 0.1- 171215 W87 0.0 0.1- 180103 F51 0.1+ 0.3+ 180607 474 0.3- 0.2- 171215 W87 0.1- 0.2- 180103 F51 0.1+ 0.3- 180717 474 0.1+ 0.0 171215 W87 0.0 0.2- 180103 F51 0.1- 0.1+ 180717 474 0.1+ 0.0 171215 W87 0.1+ 0.2- 180114 Q62 0.0 0.0 180717 474 0.2- 0.2- 171215 691 0.1+ 0.1+ 180114 Q62 0.2+ 0.0 180717 474 0.1+ 0.2- 171215 691 0.1+ 0.0 180114 Q62 0.4+ 0.2+ 171215 691 0.3+ 0.4- 180211 474 0.0 0.1+ ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2018 Oct. 11