Nakano Note (Nakano wa Kangaeru noda) NK 4791 C/2016 P4 (PANSTARRS)
The following improved orbital elements, by S. Nakano, are from 45 observations 2016 July 31 to 2017 May 23. 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. Later observations after from former orbit were reported, recently. So that orbit is great improved (although the last obs. are single night). Epoch = 2016 Oct. 19.0 TT T = 2016 Oct. 15.47602 +/- 0.01744 (m.e.) TT Peri. = 355.90539 +/- 0.00167 Node = 320.78480 +/- 0.00003 (2000.0) Inc. = 29.92664 +/- 0.00009 q = 5.8919289 +/- 0.0000201 AU e = 0.9817684 +/- 0.0000137 1/a = +0.0030943 +/- 0.0000023 1/AU origin = +0.003254 (Q= 8) future = +0.002895 The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2016/ 160810 807 0.3- 0.5- 160906 Q62 0.1- 0.3+ 160731 F51 0.1+ 0.2+ 160810 807 0.3- 0.8- 160906 Q62 0.2- 0.1+ 160731 F51 0.0 0.4+ 160810 807 0.0 0.3+ 160906 Q62 0.0 0.3+ 160731 F51 0.1- 0.1+ 160810 Q62 0.8- 0.7- 160907 568 0.1+ 0.0 160807 F51 0.2+ 0.2+ 160810 Q62 0.6- 0.5- 160907 568 0.0 0.1- 160807 F51 0.0 0.0 160812 807 0.4- 0.3- 160907 568 0.0 0.1- 160807 F51 0.1- 0.0 160812 807 0.1- 0.1- 161009 568 0.1- 0.1+ 160807 F51 0.0 0.0 160824 291 0.3+ 0.2- 161009 568 0.0 0.2+ 160807 F51 0.0 0.0 160824 291 0.5- 0.2+ 161009 568 0.0 0.1+ 160807 F51 0.1- 0.1- 160824 291 0.2- 0.1+ 161009 568 0.1- 0.1+ 160807 F51 0.1+ 0.1+ 160829 291 0.0 0.6+ 2017/ 160808 807 0.1+ 0.2- 160829 291 0.5+ 0.0 170523 568 0.0 0.0 160808 807 0.3- 0.5- 160829 291 0.2+ 0.3+ 170523 568 0.1- 0.0 160808 807 0.1- 0.3- 160830 291 0.3- 0.1- 170523 568 0.1+ 0.0 160808 568 0.1+ 0.0 160830 291 0.0 0.3+ 170523 568 0.0 0.1- 160808 568 0.1+ 0.0 160830 291 0.0 0.1+ ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2022 Aug. 16