Nakano Note (Nakano wa Kangaeru noda) NK 3384 C/2017 D2 (Barros)

The following improved orbital elements, S. Nakano, are from 123 observations 2017 Feb. 23 to July 6. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.56 arc second. Epoch = 2017 July 26.0 TT T = 2017 July 14.53555 +/- 0.00571 (m.e.) TT Peri. = 334.34103 +/- 0.00250 Node = 331.04107 +/- 0.00068 (2000.0) Inc. = 31.26587 +/- 0.00012 q = 2.4858290 +/- 0.0000439 AU e = 0.9981279 +/- 0.0000584 1/a = +0.0007531 +/- 0.0000235 1/AU origin = +0.001391 (Q= 6) future = +0.000581 The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2017/ 170305 Q62 0.2+ 0.1+ 170518 E94 0.5- 0.8+ 170223 Y00 0.8- 0.5- 170305 Q62 0.2+ 0.2+ 170518 E94 1.4+ 0.9+ 170223 Y00 0.8- 0.7- 170306 Q62 0.0 0.2+ 170518 E94 0.9- 0.8+ 170223 Y00 0.7- 0.7- 170306 Q62 0.1+ 0.2+ 170528 Q62 0.0 0.2+ 170223 474 0.1- 0.2- 170306 Q62 0.2+ 0.0 170528 Q62 0.0 0.0 170223 474 0.1+ 0.5- 170313 Y00 1.1- 0.5+ 170528 Q62 0.0 0.2+ 170223 474 0.2+ 0.5- 170313 Y00 0.1- 0.5+ 170531 W96 0.6- 0.5+ 170223 Q62 0.3+ 0.8- 170313 Y00 0.1- 0.7+ 170531 W96 0.4- 0.8+ 170223 Q62 0.1+ 0.2+ 170313 W88 0.7+ 0.1- 170606 W88 0.6+ 0.1- 170223 Q62 0.1+ 0.4- 170313 W88 0.7+ 0.2+ 170606 W88 0.6+ 0.2- 170223 Q62 0.2- 0.6- 170313 W88 0.4+ 0.2+ 170616 I66 0.7+ 0.4- 170223 Q62 0.2- 0.2- 170324 Y00 1.4- 0.7+ 170616 I66 0.6+ 0.4- 170223 Q62 0.3+ 0.2+ 170324 Y00 0.1+ 1.1- 170618 T08 0.1- 0.2+ 170223 Q62 0.2- 0.4+ 170324 Y00 0.3+ 0.4+ 170618 T08 0.3- 0.5+ 170224 Q62 0.1+ 0.0 170324 W88 0.2+ 0.0 170618 T08 0.1+ 0.1- 170224 Q62 0.1+ 0.1- 170324 W88 0.0 0.2+ 170621 B74 1.1+ 0.0 170224 Q62 0.5- 0.3+ 170324 W88 0.1+ 0.2- 170621 B74 1.0+ 1.0+ 170224 Q62 0.2+ 0.0 170325 Y00 0.4- 0.5- 170621 B74 1.3+ 0.9+ 170224 Q62 0.1- 0.1+ 170325 Y00 0.7- 0.1- 170626 T08 0.9- 0.1- 170224 Q62 0.0 0.0 170325 Y00 0.7- 0.2- 170626 T08 (2.2- 0.2+) 170224 Q62 0.2- 0.0 170325 Y00 0.5- 0.5- 170626 T08 (4.8- 0.4-) 170224 Q62 0.4- 0.2- 170325 Y00 0.2- 0.5+ 170629 E94 0.7+ 0.3+ 170224 Q62 0.2+ 0.4- 170325 Y00 0.3- 0.0 170629 E94 0.3+ 0.4+ 170224 Q62 0.0 0.1- 170325 Y00 0.2- 0.1- 170629 E94 0.1+ 0.6+ 170224 Q62 0.3- 0.1- 170325 Y00 0.1- 0.0 170629 E94 0.0 0.2- 170226 474 0.3+ 0.0 170325 Y00 0.7- 0.8- 170704 B74 0.4+ 0.7- 170226 474 0.5- 0.3- 170402 Y00 (2.3- 0.2+) 170704 B74 0.5+ 0.1+ 170226 474 0.0 0.1+ 170402 Y00 0.5- 0.4+ 170704 B74 1.2+ 0.3- 170226 Q62 0.2- 0.7- 170402 Y00 1.3+ 1.0+ 170704 Y00 0.8+ 0.1+ 170226 Q62 0.4+ 0.9- 170403 W98 1.7- 0.4- 170704 Y00 0.3+ 0.2- 170228 Y00 1.1+ 0.3+ 170403 W98 0.1+ 0.1- 170704 Y00 0.2+ 0.1- 170228 Y00 1.2+ 0.3+ 170403 W98 0.3- 0.8+ 170704 T08 0.7- 0.1- 170228 Y00 0.2- 0.0 170407 W92 1.1- 0.2+ 170704 T08 0.6- 0.2- 170228 I47 0.1+ 0.3- 170407 W92 0.8- 0.8- 170704 T08 0.9- 0.2- 170228 I47 0.8+ 0.2- 170407 W92 0.3- 1.1+ 170704 T08 1.3- 0.1+ 170228 I47 0.2- 0.1+ 170425 474 0.6+ 0.3- 170705 Y00 1.4- 0.9- 170228 I47 0.9+ 0.9+ 170425 474 0.6+ 0.1- 170705 Y00 0.7- 0.6- 170301 W88 0.2+ 0.2- 170425 474 0.7+ 0.0 170705 Y00 (2.2- 0.4-) 170301 W88 0.2+ 0.3- 170509 W96 1.5- 1.9+ 170705 Y00 0.3- 1.0- 170302 Q62 0.5+ 0.2- 170509 W96 1.1- 0.8+ 170705 Y00 (3.1- 0.1-) 170302 Q62 0.2+ 0.2- 170516 W96 0.2+ 0.2+ 170705 Y00 0.2+ 0.7- 170302 Q62 0.5+ 0.1- 170516 W96 0.4- 1.2- 170706 W96 0.1+ 0.4- 170302 Q62 0.3+ 0.0 170516 W96 0.4+ 0.0 170706 W96 0.2- 0.3+ ( ) -------- Rejected Obs.

Associate of the CBAT Syuichi Nakano 2017 July 12

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