Nakano Note (Nakano wa Kangaeru noda) NK 3455 C/2017 F2 (PANSTARRS)

The following improved orbital elements, S. Nakano, are from 38 observations 2017 Mar. 31 to July 19. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.40 arc second. The comet will pass 4.46 AU from Jupiter on 2018 May 23 UT. Epoch = 2017 Nov. 23.0 TT T = 2017 Nov. 26.38727 +/- 0.09202 (m.e.) TT Peri. = 134.91616 +/- 0.00752 Node = 38.66954 +/- 0.00080 (2000.0) Inc. = 42.50718 +/- 0.00031 q = 6.9275691 +/- 0.0001103 AU e = 1.0052491 +/- 0.0001027 1/a = -0.0007577 +/- 0.0000148 1/AU origin = +0.000018 (Q= 6) future = -0.000314 The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2017/ 170404 I52 1.2- 1.3- 170423 215 (3.6- 0.3+) 170331 F51 0.1+ 0.2+ 170404 I52 1.2- 0.2- 170423 215 (3.1- 0.0 ) 170331 F51 0.0 0.1+ 170404 I52 0.7- 0.0 170423 215 (2.3- 0.4+) 170331 F51 0.3+ 0.0 170404 I52 0.6- 0.3- 170519 568 0.2+ 0.0 170401 568 0.1+ 0.0 170404 F51 0.1+ 0.0 170519 568 0.2+ 0.0 170401 568 0.1+ 0.1+ 170404 F51 0.2- 0.3- 170523 U69 0.0 0.1+ 170401 568 0.2+ 0.0 170404 F51 0.2- 0.0 170523 U69 0.3- 0.4+ 170401 V37 0.2+ 0.3- 170405 I52 0.1- 0.2+ 170523 U69 0.5- 0.3+ 170401 V37 0.3+ 0.2- 170405 I52 0.2+ 0.1+ 170526 G96 0.5- 0.1- 170401 V37 0.3- 0.3- 170406 291 0.5- 0.1+ 170526 G96 0.4- 0.0 170401 V37 0.1- 0.3- 170406 291 0.3- 0.1+ 170526 G96 0.5- 0.2- 170403 926 1.3- 0.1+ 170414 H06 0.5- 0.3+ 170526 G96 0.8- 0.2- 170403 926 0.1+ 0.3- 170414 H06 0.4- 0.1+ 170719 568 0.1- 0.0 170403 926 0.0 0.7+ 170414 H06 0.4- 0.4+ 170719 568 0.0 0.0 ( ) -------- Rejected Obs.

Associate of the CBAT Syuichi Nakano 2017 Oct. 6

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