Nakano Note (Nakano wa Kangaeru noda) NK 4189 P/2015 HG16 (PANSTARRS)
The following improved orbital elements, by S. Nakano, are from 43 observations 2015 Jan. 14 to 2016 July 22. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.25 arc second. See the previous orbit in NK 3093. Epoch = 2014 July 2.0 TT T = 2014 June 28.97427 +/- 0.00312 (m.e.) TT Peri. = 48.15321 +/- 0.00088 Node = 59.52583 +/- 0.00008 (2000.0) Inc. = 18.86851 +/- 0.00002 q = 3.1317877 +/- 0.0000229 AU e = 0.3462216 +/- 0.0000067 a = 4.7902896 +/- 0.0000602 AU n' = 0.09400726 +/- 0.00000177 P = 10.484 +/- 0.0001976 years (+/- 0.07 day) The predicted orbit for the 2024 return is as follows: T = 2024 Oct. 16.09691 TT Epoch = 2024 Oct. 17.0 TT Peri. = 46.74645 e = 0.3464957 Node = 57.05316 (2000.0) a = 4.7792643 AU Inc. = 19.00616 n'= 0.09433275 q = 3.1232698 AU P = 10.448 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2015/ 150420 F51 0.0 0.1+ 160404 F51 0.1- 0.0 150114 F51 0.2+ 0.1+ 150421 F51 0.4+ 0.0 160404 F51 0.1- 0.1- 150114 F51 0.5+ 0.1- 150421 F51 0.2- 0.0 160404 F51 0.1- 0.1+ 150114 F51 0.1+ 0.3- 150421 F51 0.1- 0.0 160404 F51 0.1- 0.2+ 150114 F51 0.1+ 0.1- 150421 F51 0.1- 0.5- 160406 568 0.1+ 0.2- 150115 695 0.1- 0.0 150424 F51 0.0 0.1+ 160406 568 0.1+ 0.2- 150115 695 0.0 0.4- 150424 F51 0.1+ 0.1+ 160406 568 0.1+ 0.2- 150324 F51 0.1- 0.0 150424 F51 0.2+ 0.2+ 160409 Q62 0.7- 0.0 150324 F51 0.1- 0.0 150424 F51 0.0 0.2+ 160409 Q62 0.9- 0.3+ 150324 F51 0.2- 0.1+ 2016/ 160409 Q62 0.7- 0.3- 150324 F51 0.1+ 0.0 160211 F51 0.3+ 0.1+ 160722 W84 0.9+ 0.2- 150409 F51 0.2+ 0.2- 160211 F51 0.2- 0.0 2018/ 150409 F51 0.1+ 0.1+ 160211 F51 0.3+ 0.3+ 180714 T05 (2.8+ 5.2-) 150409 F51 0.3- 0.0 160403 F51 0.6- 0.2+ 180714 T05 (5.2+ 5.5-) 150420 F51 0.1+ 0.1- 160403 F51 0.0 0.1- 180714 T05 (8.2+ 5.6-) 150420 F51 0.1+ 0.0 160403 F51 0.1- 0.1- 150420 F51 0.1- 0.1- 160403 F51 0.3+ 0.3- ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2020 Sept. 5