Nakano Note (Nakano wa Kangaeru noda) NK 3574 C/2017 K1 (PANSTARRS)
The following improved orbital elements, by S. Nakano, are from 38 observations 2017 May 21 to 2018 Mar. 27. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.39 arc second. Orbit depends on one night observations in 2018. The comet has passed 3.07 AU from Saturn on 2016 Sept. 24 and 1.86 AU from Jupiter on 2018 Feb. 27 UT. See an orbit in HICQ 2018. Epoch = 2018 Mar. 23.0 TT T = 2018 Mar. 14.16120 +/- 0.05676 (m.e.) TT Peri. = 4.15918 +/- 0.00406 Node = 225.64195 +/- 0.00008 (2000.0) Inc. = 154.00991 +/- 0.00014 q = 7.2857392 +/- 0.0001038 AU e = 1.0024840 +/- 0.0000287 1/a = -0.0003409 +/- 0.0000039 1/AU origin = +0.000037 (Q= 8) future = +0.000060 The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2017/ 170523 568 0.0 0.0 170621 Q62 0.6+ 0.8- 170521 F51 0.1- 0.1+ 170523 568 0.0 0.0 170626 F51 0.1+ 0.0 170521 F51 0.1- 0.0 170523 568 0.0 0.0 170626 F51 0.0 0.2+ 170521 F51 0.0 0.1+ 170523 568 0.1- 0.0 170715 F51 0.2- 0.0 170521 F51 0.1- 0.1+ 170612 Q62 1.4+ 0.4- 170715 F51 0.1- 0.1+ 170522 691 0.2+ 0.1- 170612 Q62 1.5+ 0.6- 170715 F51 0.1+ 0.1+ 170522 691 0.1- 0.5- 170619 Q62 0.4+ 0.5+ 170715 F51 0.0 0.2+ 170522 691 0.0 0.4+ 170619 Q62 0.6+ 0.3+ 2018/ 170522 Q62 0.2- 0.4- 170619 Q62 0.5+ 0.5+ 180327 703 1.5+ 1.3+ 170522 Q62 0.0 0.1- 170619 215 0.3+ 1.2- 180327 703 0.6+ 0.3- 170522 Q62 0.3- 0.1+ 170619 215 0.5- 0.6- 180327 703 1.6- 0.6- 170523 691 0.3- 0.4- 170619 215 0.6- 1.7- 180327 703 0.5- 0.7- 170523 691 0.1- 0.6- 170621 Q62 0.2+ 0.7- 170523 691 0.9+ 0.5- 170621 Q62 0.5+ 0.6- ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2018 Apr. 5