Nakano Note (Nakano wa Kangaeru noda) NK 2787 C/2013 X1 (PANSTARRS)

The following improved orbital elements, by S. Nakano, are from 74 observations 2013 Nov. 29 to 2014 Aug. 25. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.32 arc second. The comet has passed 3.21 AU and will pass 1.64 AU from Jupiter on 2014 May 11 and 2017 July 5 UT, respectively. The observations in 2014 August show the residuals of -9" off mainly for R. A. from an orbit in HICQ 2014. Epoch = 2016 Apr. 2.0 TT T = 2016 Apr. 20.78488 +/- 0.03194 (m.e.) TT Peri. = 164.45492 +/- 0.00186 Node = 130.94987 +/- 0.00065 (2000.0) Inc. = 163.22905 +/- 0.00032 q = 1.3143229 +/- 0.0000254 AU e = 1.0010046 +/- 0.0000328 1/a = -0.0007643 +/- 0.0000250 1/AU origin = +0.000271 (Q= 6) future = -0.000389 The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2013/ 131223 215 0.2+ 0.3+ 140128 H06 0.2- 0.3+ 131129 G96 0.0 0.4+ 131223 215 0.0 0.3+ 140128 H06 0.3- 0.4+ 131129 G96 0.0 0.1+ 131226 F51 0.0 0.1+ 140202 349 0.5+ 0.5- 131129 G96 0.2- 0.3+ 131226 F51 0.0 0.0 140202 349 0.9+ 0.3+ 131129 G96 0.0 0.6+ 131226 F51 0.1+ 0.1+ 140308 215 0.5- 0.0 131204 F51 0.2+ 0.2- 131226 F51 0.1+ 0.2+ 140308 215 0.1- 0.1- 131204 F51 0.2+ 0.1- 131227 461 0.1- 0.4+ 140308 215 0.3+ 0.3- 131204 F51 0.1+ 0.0 131227 461 0.6- 0.1+ 140314 461 0.5- 0.1- 131204 F51 0.0 0.0 131227 461 0.1- 0.3+ 140314 461 0.4- 0.1- 131205 568 0.1- 0.1- 131227 461 0.2- 0.3+ 140314 461 0.9- 0.2+ 131205 568 0.1- 0.2- 131227 461 0.0 0.3+ 140320 H45 0.3+ 0.1- 131205 568 0.1- 0.1- 131227 461 0.1- 0.1- 140320 H45 0.1+ 0.1+ 131205 Q62 0.3+ 0.1- 131227 461 0.3- 0.1+ 140320 H45 0.1+ 0.0 131205 Q62 0.2+ 0.2- 131227 461 0.2+ 0.2+ 140320 H45 0.3- 0.1- 131205 Q62 0.1+ 0.5- 131228 349 0.7+ 0.1- 140324 H45 0.1+ 0.2+ 131208 130 0.2+ 0.4+ 131228 349 0.0 0.5+ 140324 H45 0.1+ 0.4- 131208 130 0.4- 0.6+ 131231 G96 0.0 0.1- 140324 H45 0.2+ 0.4- 131208 130 0.1+ 1.1+ 131231 G96 0.2+ 0.1+ 140324 H45 0.4+ 0.3- 131209 C10 0.1+ 0.3- 131231 G96 0.1+ 0.1+ 140324 H45 0.6+ 0.4- 131209 C10 0.0 0.3+ 131231 G96 0.0 0.0 140823 461 0.0 0.2+ 131209 C10 0.7- 0.3- 131231 G96 0.0 0.2+ 140823 461 0.2- 0.1- 131210 372 0.2- 0.8- 131231 G96 0.2+ 0.1+ 140825 461 0.1- 0.1+ 131210 372 0.7- 0.1- 131231 G96 0.1+ 0.1+ 140825 461 0.1+ 0.0 131213 372 0.7- 0.5- 131231 G96 0.0 0.1+ 140825 461 0.1+ 0.2- 131213 372 1.3- 0.4- 2014/ 131223 215 0.3+ 0.3+ 140128 H06 0.3- 0.1+ ( ) -------- Rejected Obs.

Associate of the CBAT Syuichi Nakano 2014 Sept. 26

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