Nakano Note (Nakano wa Kangaeru noda) NK 4006 C/2017 K1 (PANSTARRS)

The following improved orbital elements, by S. Nakano, are from 128 observations 2017 May 21 to 2019 May 25. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.51 arc second. 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 the previous orbits in NK 3574, NK 3754 (= HICQ 2019) and NK 3796. Epoch = 2018 Mar. 23.0 TT T = 2018 Mar. 14.23573 +/- 0.00225 (m.e.) TT Peri. = 4.16485 +/- 0.00015 Node = 225.64228 +/- 0.00001 (2000.0) Inc. = 154.00937 +/- 0.00002 q = 7.2856159 +/- 0.0000107 AU e = 1.0024672 +/- 0.0000088 1/a = -0.0003386 +/- 0.0000012 1/AU origin = +0.000039 (Q= 9) future = +0.000063 The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2017/ 180412 F51 0.1- 0.1+ 180611 703 0.9- 0.0 170521 F51 0.0 0.1+ 180412 F51 0.2+ 0.2+ 180611 703 0.6+ 0.3- 170521 F51 0.0 0.0 180412 F51 0.1+ 0.0 180611 703 0.3- 0.5- 170521 F51 0.1+ 0.2+ 180414 703 (1.5- 2.7-) 180618 G96 0.2- 0.3- 170521 F51 0.0 0.2+ 180414 703 0.2+ 1.4- 180618 G96 0.0 0.2- 170522 691 0.3+ 0.1- 180414 703 0.7- 1.1- 180618 G96 0.1+ 0.4- 170522 691 0.0 0.5- 180416 G96 0.2+ 0.6- 180618 G96 0.1+ 0.6- 170522 691 0.1+ 0.5+ 180416 G96 0.2- 0.7- 180618 G40 0.3+ 1.4- 170522 Q62 0.1- 0.3- 180416 G96 0.3+ 0.5- 180618 G40 0.5- 1.2- 170522 Q62 0.0 0.0 180416 G96 0.1+ 0.6- 2019/ 170522 Q62 0.2- 0.1+ 180416 D95 0.5+ 0.9- 190207 461 0.7+ 0.2+ 170523 691 0.2- 0.3- 180416 D95 0.8- 1.1- 190207 461 0.7+ 0.1- 170523 691 0.1- 0.5- 180418 A71 0.7- 0.4+ 190207 461 1.4+ 0.2+ 170523 691 1.0+ 0.5- 180419 A71 0.4+ 0.1+ 190208 F51 0.4+ 0.2+ 170523 568 0.0 0.0 180419 A71 0.3- 0.5+ 190208 F51 0.2- 0.2+ 170523 568 0.0 0.0 180421 309 0.0 0.0 190208 F51 0.0 0.0 170523 568 0.1+ 0.0 180421 309 0.1- 0.0 190208 F51 0.1+ 0.1+ 170523 568 0.0 0.1+ 180421 309 0.1- 0.1+ 190208 F52 0.1- 0.2+ 170612 Q62 1.4+ 0.4- 180421 309 0.0 0.0 190208 F52 0.2- 0.1+ 170612 Q62 1.5+ 0.6- 180421 309 0.0 0.0 190208 F52 0.1- 0.2- 170619 Q62 0.4+ 0.5+ 180421 309 0.0 0.1+ 190304 Q62 0.9+ 0.1- 170619 Q62 0.5+ 0.3+ 180421 309 0.0 0.1+ 190304 Q62 0.3+ 0.1+ 170619 Q62 0.5+ 0.5+ 180421 309 0.0 0.1+ 190329 G96 0.0 0.3- 170619 215 0.2+ 1.2- 180421 703 0.2- 1.1+ 190329 G96 0.4+ 1.1- 170619 215 0.6- 0.6- 180421 703 0.4+ 0.4- 190329 G96 0.0 0.9- 170619 215 0.6- 1.6- 180421 703 0.6- 0.5- 190329 G96 0.2+ 1.1- 170621 Q62 0.2+ 0.7- 180421 215 0.2+ 0.1+ 190329 703 0.5+ 1.5- 170621 Q62 0.4+ 0.6- 180421 215 0.4- 0.0 190329 703 1.6+ 0.9- 170621 Q62 0.5+ 0.8- 180421 215 1.2- 0.2+ 190329 703 0.7+ 0.7- 170626 F51 0.0 0.0 180506 461 0.2- 0.3- 190329 703 0.7- 0.0 170626 F51 0.0 0.2+ 180506 461 1.1- 0.4- 190404 F51 0.3- 0.4+ 170715 F51 0.3- 0.0 180508 461 0.3+ 0.1- 190404 F51 0.3- 0.2+ 170715 F51 0.2- 0.1+ 180508 461 0.3+ 0.4- 190404 F51 0.1- 0.2+ 170715 F51 0.0 0.1+ 180508 461 0.2+ 0.1- 190404 F51 0.1- 0.1+ 170715 F51 0.1- 0.2+ 180509 Q62 0.3- 0.9- 190413 G96 1.5+ 1.4- 2018/ 180509 Q62 0.2- 0.8- 190413 G96 0.2- 1.1- 180327 703 1.0+ 0.5+ 180509 Q62 0.2+ 0.6- 190413 G96 0.4+ 0.0 180327 703 0.0 1.1- 180516 703 (0.0 2.3-) 190413 G96 0.3+ 0.4- 180327 703 (2.1- 1.4-) 180516 703 0.7- 0.3+ 190506 F51 0.3+ 0.4+ 180327 703 1.0- 1.5- 180516 703 0.4+ 0.4+ 190506 F51 0.2- 0.2- 180411 703 0.7- 1.8- 180606 703 1.0- 0.0 190506 F51 0.1- 0.0 180411 703 1.0+ 1.0- 180606 703 0.3- 0.4- 190506 F51 0.0 0.3- 180411 703 1.0+ 0.8- 180606 703 0.0 0.8- 190525 461 0.4+ 0.5+ 180411 703 0.1+ 0.9- 180606 703 0.5+ 0.1+ 190525 461 0.7+ 0.2+ 180412 F51 0.0 0.3+ 180611 703 (0.8+ 2.2-) 190525 461 0.6+ 0.6+ ( ) -------- Rejected Obs.

Associate of the CBAT Syuichi Nakano 2019 Dec. 29

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