Nakano Note (Nakano wa Kangaeru noda) NK 2989 C/2014 S2 (PANSTARRS)

The following improved orbital elements, S. Nakano, are from 69 observations 2014 Sept. 2 to 2015 July 17. 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. The comet will pass 0.87 AU from Jupiter on 2017 Jan. 26 UT. The recent observations show the residuals of -10" for R. A. and Decl. from the latest orbit. Epoch = 2015 Dec. 4.0 TT T = 2015 Dec. 9.80416 +/- 0.00039 (m.e.) TT Peri. = 87.80911 +/- 0.00020 Node = 8.12258 +/- 0.00001 (2000.0) Inc. = 64.67045 +/- 0.00006 q = 2.1006471 +/- 0.0000074 AU e = 0.9876228 +/- 0.0000037 1/a = +0.0058921 +/- 0.0000018 1/AU origin = +0.006109 (Q= 8) future = +0.005872 The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2014/ 141111 Q62 0.8+ 0.9+ 150713 160 0.3+ 0.2+ 140902 F51 0.1- 0.1- 141111 Q62 0.3+ 0.5+ 150713 160 0.7+ 0.2+ 140902 F51 0.3- 0.1- 141111 Q62 0.2+ 0.2+ 150715 215 0.0 0.0 140902 F51 0.2- 0.1+ 141112 F51 0.3- 0.0 150715 215 0.0 0.0 140922 F51 0.1+ 0.2+ 141112 F51 0.0 0.0 150715 215 0.1+ 0.1+ 140922 F51 0.0 0.0 141116 215 0.1- 0.7- 150717 C36 0.8+ 0.7- 140922 F51 0.1+ 0.0 141116 215 0.0 0.6- 150717 C36 1.5+ 0.3+ 140922 F51 0.0 0.0 141116 215 0.1+ 0.5- 150717 C36 0.3+ 0.9+ 140923 W96 1.4- 0.2- 141122 F51 0.0 0.2- 150717 C36 1.0+ 0.1- 140923 W96 0.1- 0.8- 141122 F51 0.0 0.2- 150717 C36 0.4- 0.3+ 140923 568 0.4+ 0.1+ 141122 F51 0.1- 0.0 150717 C36 0.3- 0.0 140923 568 0.4+ 0.1+ 141122 F51 0.0 0.0 150717 C36 0.2- 0.1- 140923 568 0.3+ 0.1+ 141124 F51 0.2+ 0.1+ 150717 C36 0.4- 0.2- 140924 711 0.2- 0.1- 141124 F51 0.0 0.1- 150717 C36 0.4- 0.0 140924 711 0.1- 0.2- 141124 F51 0.1+ 0.1- 150717 C36 0.5- 0.1- 140926 Q62 0.1- 0.1+ 141124 F51 0.1- 0.2+ 150717 C36 0.5- 0.4- 140926 Q62 0.6- 0.1+ 141218 F51 0.0 0.1+ 150717 C36 0.3- 0.4- 140926 Q62 0.8- 0.3+ 141218 F51 0.0 0.1+ 150717 C36 0.4- 0.2+ 140927 A77 0.1- 0.8- 141218 F51 0.1- 0.0 150717 C36 0.5- 0.5- 140927 A77 0.4- 0.9- 141218 F51 0.1- 0.1+ 150717 C36 0.0 0.1- 141024 G45 1.3- 0.0 141220 204 0.2+ 0.2- 150717 C36 0.2- 0.2+ 141024 G45 0.1- 0.3+ 141220 204 0.6+ 0.1- 150717 C36 0.3- 0.0 141024 G45 0.6- 0.1- 2015/ 150717 C36 0.4- 0.3- 141024 G45 0.0 0.4- 150713 160 0.3+ 0.3+ ( ) -------- Rejected Obs.

Associate of the CBAT Syuichi Nakano 2015 July 31

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