Nakano Note (Nakano wa Kangaeru noda) NK 2643 P/2013 W1 (PANSTARRS)

The following improved orbital elements, by S. Nakano, are from 95 observations 2013 Nov. 9 to 2014 Feb. 26. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.67 arc second. Epoch = 2014 Mar. 4.0 TT T = 2014 Mar. 8.16932 +/- 0.00016 (m.e.) TT Peri. = 1.32325 +/- 0.00034 Node = 117.85441 +/- 0.00039 (2000.0) Inc. = 4.69965 +/- 0.00005 q = 1.4156468 +/- 0.0000048 AU e = 0.5939204 +/- 0.0000227 a = 3.4861310 +/- 0.0000561 AU n' = 0.15142184 +/- 0.00000365 P = 6.509 +/- 0.0001571 years (+/- 0.06 day) The predicted orbit for the 2020 return is as follows: T = 2020 Sept.10.59107 TT Epoch = 2020 Sept.28.0 TT Peri. = 1.29519 e = 0.5928936 Node = 117.84722 (2000.0) a = 3.4914725 AU Inc. = 4.69555 n'= 0.15107449 q = 1.4214008 AU P = 6.524 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2013/ 131126 958 1.9- 0.4+ 131225 D90 1.4- 1.3- 131109 703 (0.5- 2.5+) 131126 958 0.2+ 0.4+ 131225 D90 1.3- 1.0- 131109 703 0.2- 0.1+ 131126 958 0.4+ 1.5+ 131226 G96 0.7- 0.3- 131109 703 1.2+ 1.9+ 131126 958 0.1+ 1.3+ 131226 G96 0.7- 0.3- 131109 703 0.8+ 0.8+ 131127 Q62 1.5+ 0.1- 131226 G96 0.4- 0.3- 131124 F51 0.4- 0.1- 131127 Q62 1.6+ 0.1- 131226 G96 0.5- 0.9- 131124 F51 0.4- 0.1- 131127 Q62 (2.4+ 0.7-) 131228 349 0.8+ 0.2- 131124 F51 0.3- 0.1- 131127 Q62 0.6- 0.3+ 131228 349 0.7+ 0.0 131125 291 0.5- 0.1- 131127 Q62 0.7- 0.1- 2014/ 131125 291 0.1+ 0.2- 131127 Q62 0.7- 0.0 140102 372 0.6+ 0.6- 131125 291 0.3- 0.6- 131127 C10 0.3+ 0.1- 140102 372 1.2+ 0.6- 131125 Q62 0.5- 0.3+ 131127 C10 0.3+ 0.2+ 140105 D90 1.4+ 0.7- 131125 Q62 0.4- 0.0 131129 372 0.1+ 0.6+ 140105 D90 0.5- 0.3- 131125 Q62 1.1+ 0.3- 131129 372 0.1+ 0.6+ 140105 D90 0.3- 0.1+ 131125 Q62 1.9+ 1.1+ 131130 372 0.4+ 0.6+ 140126 H45 0.1+ 0.0 131125 Q62 1.8+ 0.8+ 131130 372 0.6+ 0.6+ 140126 H45 0.5- 0.6- 131125 Q62 0.1- 0.1- 131202 C10 0.0 0.3+ 140126 H45 0.5- 0.6- 131125 Q62 0.1- 0.1- 131202 C10 0.2+ 0.5+ 140126 H45 0.4+ 0.2- 131125 Q62 0.5- 0.7- 131207 291 0.7- 0.2- 140126 H45 0.4+ 0.7- 131125 595 0.2+ 0.0 131207 291 0.8- 0.3- 140126 H45 1.0+ 0.4+ 131125 595 0.4+ 0.1- 131207 291 0.8- 0.1- 140127 372 0.6+ 0.1- 131126 926 0.6- 0.3+ 131207 K25 0.4- 0.4- 140127 372 0.9+ 0.0 131126 926 0.3+ 0.2- 131207 130 0.0 0.1- 140129 703 1.4+ 0.3+ 131126 926 0.3- 0.7- 131207 K25 0.5- 0.4+ 140129 703 0.0 0.1+ 131126 Q62 0.3+ 0.1- 131207 130 0.0 0.4+ 140129 703 0.5- 0.2- 131126 Q62 0.9+ 0.1+ 131208 K25 0.6- 0.1- 140129 703 0.8+ 0.3+ 131126 Q62 1.1+ 0.1+ 131208 K25 0.3- 1.0+ 140223 215 0.6+ 0.7+ 131126 Q62 0.9+ 0.1- 131209 D90 0.0 0.5+ 140223 215 0.3+ 0.3+ 131126 Q62 1.3+ 0.4- 131209 D90 0.8- 0.7- 140223 215 0.0 0.1+ 131126 Q62 0.3+ 0.0 131209 D90 0.7- 1.2- 140226 F51 0.4- 0.1+ 131126 Q62 0.7+ 0.4+ 131221 215 1.6+ 0.7- 140226 F51 0.2- 0.3+ 131126 Q62 0.5+ 0.7+ 131221 215 1.8+ 0.8- 140226 F51 0.1+ 0.1+ 131126 958 0.5+ 0.4+ 131221 215 1.4+ 0.6- 131126 958 0.2- 0.2- 131225 D90 (3.2- 0.9+) ( ) -------- Rejected Obs.

Associate of the CBAT Syuichi Nakano 2014 Mar. 4

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