Nakano Note (Nakano wa Kangaeru noda) NK 1971 P/WISE (2010 L1 = 2002 Q16)

The following improved orbital elements, by S. Nakano, are from 58 observations 2002 to 2010. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.47 arc second. Epoch = 2010 Feb. 13.0 TT T = 2010 Feb. 4.57376 +/- 0.00100 (m.e.) TT Peri. = 316.42037 +/- 0.00090 Node = 318.52813 +/- 0.00020 (2000.0) Inc. = 21.08918 +/- 0.00017 q = 2.1395392 +/- 0.0000246 AU e = 0.4661041 +/- 0.0000061 a = 4.0074090 +/- 0.0000163 AU n' = 0.12285945 +/- 0.00000075 P = 8.022 +/- 0.0000489 years T = 2002 Jan. 19.70649 TT Epoch = 2002 Jan. 6.0 TT Peri. = 316.31633 e = 0.4652966 Node = 318.60231 (2000.0) a = 4.0189188 AU Inc. = 21.05914 n'= 0.12233204 q = 2.1489295 AU P = 8.057 years The predicted orbit for the 2018 return is as follows: T = 2018 Feb. 8.65108 TT Epoch = 2018 Feb. 11.0 TT Peri. = 316.67918 e = 0.4577599 Node = 316.67983 (2000.0) a = 4.0390690 AU Inc. = 21.20107 n'= 0.12141775 q = 2.1901451 AU P = 8.117 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2002/ 100603 C51 1.5+ 1.6- 100608 695 0.5+ 0.1- 020827 644 0.4+ 0.1- 100603 C51 (0.8- 2.2-) 100608 291 0.6- 0.4+ 020827 644 0.3- 0.4+ 100603 C51 0.5+ 0.1+ 100608 695 0.2- 0.2- 020827 644 0.5+ 0.2+ 100603 C51 0.2- 0.2+ 100608 695 0.4- 0.4+ 020904 644 0.4+ 0.2- 100605 C51 0.4+ 0.6+ 100608 291 0.2+ 0.7+ 020904 644 0.0 0.7- 100605 C51 0.1+ 0.5+ 100608 291 1.1+ 0.4+ 020904 644 0.1- 0.4- 100606 C51 0.5- 1.4- 100713 474 0.1- 0.1+ 020911 644 0.1- 0.2+ 100606 C51 0.3- 0.4- 100713 474 0.1- 0.2+ 020911 644 0.1- 0.6+ 100606 C51 0.2- 0.3+ 100713 474 0.2+ 0.2+ 020911 644 0.5+ 0.0 100606 C51 (0.1+ 3.1+) 100713 474 0.1+ 0.2+ 020912 644 0.4- 0.4- 100606 291 0.0 0.0 100713 474 0.7- 0.2- 020912 644 0.2- 0.3+ 100606 291 0.1- 0.3+ 100714 474 0.0 0.4+ 020912 644 0.4- 0.1- 100606 291 0.7+ 0.0 100714 474 0.3+ 0.5- 2010/ 100606 C51 0.6+ 0.3- 100714 474 0.2- 0.1+ 100602 C51 0.2- 0.5- 100606 C51 1.5- 1.2+ 100714 474 0.2+ 0.5+ 100602 C51 (0.6+ 2.1+) 100606 C51 0.1+ 0.1+ 100716 204 0.5- 0.6- 100602 C51 0.1- 0.0 100606 C51 0.0 0.4- 100716 204 0.0 0.0 100602 C51 0.7+ 0.5- 100606 C51 0.6- 0.6- 100903 G96 0.1+ 0.3+ 100602 C51 0.3- 0.3+ 100607 F65 0.8- 0.2- 100903 G96 0.3+ 0.2- 100603 C51 0.5- 0.7- 100607 F65 0.4- 0.2+ 100903 G96 0.1- 0.0 100603 C51 0.4+ 0.7+ 100607 F65 0.3+ 0.3+ 100903 G96 0.1+ 0.2- ( ) -------- Rejected Obs.

Associate of Central Bureau for Astronomical Telegrams Syuichi Nakano 2010 Sept. 5

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