Nakano Note (Nakano wa Kangaeru noda) NK 2898 C/2012 U1 (PANSTARRS)

The following improved orbital elements, by S. Nakano, are from 152 observations 2012 Oct. 17 to 2015 Apr. 26. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.46 arc second. The comet has passed 3.83 AU from Jupiter on 2012 Apr. 7 UT. See the previous orbits in NK 2548 and NK 2674 (= HICQ 2014). Epoch = 2014 July 2.0 TT T = 2014 July 4.89737 +/- 0.00117 (m.e.) TT Peri. = 70.07063 +/- 0.00013 Node = 26.98195 +/- 0.00001 (2000.0) Inc. = 56.33881 +/- 0.00001 q = 5.2637177 +/- 0.0000084 AU e = 0.9995490 +/- 0.0000087 1/a = +0.0000857 +/- 0.0000017 1/AU origin = +0.001268 (Q= 8) future = +0.000833 The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2012/ 130906 215 (2.0- 0.2+) 140204 C23 0.1+ 1.2+ 121017 G96 0.0 0.3- 130906 215 1.9- 0.2- 140204 C23 0.2- 0.2- 121017 G96 0.6+ 0.3- 130906 215 1.8- 0.3- 140222 C23 0.2- 0.5- 121017 G96 0.4+ 0.5- 130907 C47 0.4- 0.0 140222 C23 0.1- 0.3- 121017 G96 0.1+ 0.6- 130907 C47 0.0 0.2+ 140305 C23 0.6- 0.5- 121018 F51 0.2+ 0.0 130907 C47 0.3+ 0.0 140305 C23 (2.4- 0.1+) 121018 F51 0.0 0.0 131023 970 0.1- 0.1- 140308 215 0.3- 0.4- 121018 F51 0.1+ 0.0 131023 970 0.5+ 0.6- 140308 215 0.2- 0.1- 121019 568 0.0 0.0 131030 926 0.7- 0.0 140308 215 0.1+ 0.7+ 121019 568 0.0 0.1+ 131030 926 0.4- 0.6+ 140313 B96 1.2- 0.6+ 121019 568 0.1+ 0.0 131030 926 0.4- 0.3+ 140313 B96 1.1- 0.6+ 121020 H06 0.9- 0.5- 131110 C23 0.4+ 0.1+ 140313 B96 (1.7- 2.1+) 121020 H06 0.3- 0.3- 131110 C23 0.1- 0.3+ 140324 C23 1.1+ 0.4+ 121020 H06 0.8+ 0.4- 131113 130 0.9- 0.7- 140324 C23 0.7- 0.4+ 121022 291 0.4- 0.4- 131113 130 0.3+ 0.6- 140326 461 0.1- 0.1+ 121022 291 0.0 0.1+ 131113 130 0.0 0.0 140326 461 0.3+ 0.6+ 121022 F65 0.1+ 0.2+ 131118 900 0.7- 0.4- 140402 585 0.5+ 1.2- 121022 F65 0.1- 0.1- 131118 900 0.6- 1.1- 140402 585 0.3+ 0.6- 121022 C32 0.2+ 0.1+ 131124 F51 0.1- 0.0 140402 585 0.7+ 0.6- 121022 C32 0.0 0.0 131124 F51 0.4- 0.3+ 140402 585 0.5+ 0.3- 121022 C32 0.6+ 0.4+ 131124 F51 0.2- 0.1+ 140402 585 0.8+ 0.3- 121022 C32 0.1+ 0.0 131124 F51 0.4- 0.1+ 140402 585 0.8+ 0.1- 121022 C32 0.5+ 0.1- 131125 C23 0.7- 0.3+ 140402 585 0.5+ 0.3- 121025 G96 0.2- 0.5- 131125 C23 0.3+ 0.2- 140402 585 0.6+ 0.2- 121025 G96 0.2+ 0.5- 131128 H45 0.4+ 0.0 140821 H06 1.1+ 1.5+ 121025 G96 0.0 0.3- 131128 H45 0.2+ 0.0 140821 H06 1.0+ 1.6+ 121025 G96 0.0 0.1- 131128 H45 0.0 0.1+ 140821 H06 1.0+ 1.1+ 121102 G96 0.1- 0.6- 131128 H45 0.1- 0.1+ 140825 461 0.3+ 0.2- 121102 G96 0.1- 0.6- 131128 H45 0.0 0.1+ 140825 461 0.1+ 0.2+ 121102 G96 0.5+ 0.2- 131128 H45 0.2- 0.0 140825 461 0.5- 0.2+ 121102 G96 0.0 0.1- 131128 H45 0.1- 0.1+ 2015/ 121103 F51 0.2+ 0.0 131128 H45 0.0 0.1+ 150214 461 0.3+ 0.2+ 121103 F51 0.2+ 0.1+ 131202 C23 0.7+ 1.0+ 150214 461 0.0 0.3+ 121103 F51 0.2+ 0.1+ 131202 C23 0.3+ 0.0 150214 461 0.0 0.5+ 121103 F51 0.1+ 0.0 131208 C10 0.3- 0.2- 150223 C95 0.5- 0.4+ 121104 C10 0.1- 0.2- 131208 C10 0.2- 0.2- 150223 C95 0.5+ 0.8- 121104 C10 0.4+ 0.1- 131226 C23 0.3+ 0.0 150223 C95 0.4+ 0.7- 121113 H06 0.1- 1.2+ 131226 C23 0.6- 0.7+ 150223 C95 0.0 0.4+ 121113 H06 0.1+ 0.6+ 2014/ 150223 C95 0.5+ 0.2+ 121113 H06 0.0 0.5- 140101 H45 0.4+ 0.3+ 150325 I81 0.3- 0.3+ 2013/ 140101 H45 0.6+ 0.1- 150325 I81 0.1- 0.0 130105 461 0.5+ 0.6+ 140101 H45 0.4+ 0.0 150325 I81 0.3+ 0.2- 130105 461 0.2+ 0.0 140101 H45 0.4+ 0.0 150325 I81 0.8- 0.1+ 130107 461 0.1- 0.1- 140101 H45 0.6+ 0.1+ 150331 F51 0.2- 0.2- 130107 461 0.2- 0.3+ 140102 C23 0.0 0.4+ 150331 F51 0.0 0.2- 130712 461 0.6- 0.0 140102 C23 0.2- 0.1+ 150331 F51 0.1- 0.1- 130712 461 0.0 0.2+ 140102 C23 0.2- 0.1+ 150331 F51 0.2- 0.4+ 130712 461 0.0 0.3+ 140113 C23 0.0 1.2- 150411 461 0.1- 0.2+ 130720 461 0.5- 0.3+ 140113 C23 0.9+ 0.7- 150411 461 0.1+ 0.4+ 130720 461 0.4- 0.2+ 140113 C23 0.0 0.7- 150426 F51 0.1- 0.4- 130901 H06 0.5+ 0.0 140120 H45 0.5- 0.3- 150426 F51 0.2- 0.4- 130901 H06 0.4+ 0.1- 140120 H45 0.5- 0.1- 150426 F51 0.1+ 0.0 130901 H06 0.2+ 0.0 140120 H45 0.2- 0.0 150426 F51 0.2- 0.1+ ( ) -------- Rejected Obs.

Associate of the CBAT Syuichi Nakano 2015 May 14

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