Nakano Note (Nakano wa Kangaeru noda) NK 3194 P/2012 O2 (McNaught)
The following improved orbital elements, by S. Nakano, are from 81 observations 2012 May 20 to Sept. 21. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.38 arc second. Epoch = 2012 July 12.0 TT T = 2012 June 25.09786 +/- 0.00037 (m.e.) TT Peri. = 183.04645 +/- 0.00023 Node = 120.81354 +/- 0.00010 (2000.0) Inc. = 24.52738 +/- 0.00012 q = 1.6608318 +/- 0.0000035 AU e = 0.5382852 +/- 0.0000066 a = 3.5970941 +/- 0.0000145 AU n' = 0.14446957 +/- 0.00000087 P = 6.822 +/- 0.0000412 years The predicted orbit for the 2019 return is as follows: T = 2019 May 6.03182 TT Epoch = 2019 Apr. 27.0 TT Peri. = 183.34563 e = 0.5328608 Node = 120.68264 (2000.0) a = 3.6214208 AU Inc. = 24.48557 n'= 0.14301631 q = 1.6917077 AU P = 6.892 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2012/ 120721 B18 0.2- 0.3+ 120730 H06 0.0 0.1- 120520 G96 0.3- 0.7- 120722 I48 0.1- 0.3+ 120731 E12 0.2- 0.0 120520 G96 0.0 0.1- 120722 I48 0.4+ 0.4+ 120803 E07 1.0- 0.1+ 120520 G96 0.3+ 0.2+ 120722 I48 0.2+ 0.5- 120803 E07 0.9+ 0.1+ 120520 G96 0.1+ 0.5+ 120722 474 0.2- 0.3+ 120807 D90 0.3+ 0.2- 120720 E12 0.2- 0.0 120722 474 0.2- 0.5- 120807 D90 0.0 0.9- 120720 E12 0.8+ 0.6- 120722 474 0.1- 0.0 120810 E07 0.0 0.1- 120720 E12 0.2- 0.3+ 120722 474 0.2+ 0.0 120810 E07 0.3+ 0.1- 120720 E12 0.1- 0.0 120722 E12 0.1+ 0.3+ 120813 J24 (1.9- 5.6-) 120720 E12 0.1- 0.1+ 120723 807 0.6+ 0.2- 120813 J24 (3.0- 7.4-) 120720 E12 0.6- 0.4- 120723 807 0.3+ 0.1- 120817 474 0.1+ 0.1+ 120720 E12 0.8+ 0.1- 120723 807 0.6+ 0.0 120817 474 0.2- 0.1+ 120721 954 0.3- 0.5- 120723 807 0.4+ 0.3- 120817 474 0.1- 0.0 120721 954 0.4+ 0.7+ 120723 H36 0.5- 0.7+ 120817 474 0.0 0.3- 120721 H21 0.1+ 0.0 120723 H36 0.1- 0.4- 120817 372 0.1- 0.3+ 120721 H21 0.3- 0.1+ 120723 H36 0.8+ 0.2- 120817 372 0.5- 0.2+ 120721 H21 0.0 0.1- 120723 F65 0.3+ 0.1+ 120822 474 0.1- 0.2+ 120721 H21 0.3- 0.4+ 120723 F65 0.2- 0.3+ 120822 474 0.3+ 0.2- 120721 H36 0.2- 0.1- 120723 474 0.1- 0.1+ 120822 474 0.6+ 0.3- 120721 H36 0.1+ 0.1+ 120723 474 0.0 0.4+ 120906 D90 0.2- 0.3- 120721 H36 0.0 0.0 120723 474 0.1+ 0.2+ 120906 D90 0.6- 0.1- 120721 E12 0.6- 0.0 120723 474 0.0 0.0 120906 D90 0.4- 0.0 120721 E12 0.3- 0.2- 120724 C10 0.7+ 0.1- 120918 474 0.1+ 0.6+ 120721 E12 0.2- 0.1+ 120724 C10 0.7- 0.2- 120918 474 0.6+ 0.8- 120721 E12 0.5- 0.4+ 120724 C10 1.2- 0.5+ 120918 474 0.1+ 0.0 120721 B18 0.3+ 0.0 120724 C10 0.4+ 1.0- 120921 D90 0.4- 0.4- 120721 B18 0.2+ 0.1+ 120730 H06 0.1- 0.2+ 120921 D90 1.0+ 1.4+ 120721 B18 0.2+ 0.0 120730 H06 0.2- 0.0 120921 D90 0.4- 0.3- ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2016 July 13