Nakano Note (Nakano wa Kangaeru noda) NK 2417 P/2012 F2 (PANSTARRS)
The following improved orbital elements, by S. Nakano, are from 41 observations 2012 Mar. 16 to 2013 Feb. 10. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.35 arc second. The residuals for 2013 observations were 20" off from my last orbit. See an orbit in HICQ 2012. Epoch = 2013 Apr. 18.0 TT T = 2013 Apr. 9.98178 +/- 0.00272 (m.e.) TT Peri. = 33.18516 +/- 0.00078 Node = 227.13433 +/- 0.00016 (2000.0) Inc. = 14.72440 +/- 0.00006 q = 2.8970953 +/- 0.0000133 AU e = 0.5422322 +/- 0.0000100 a = 6.3287444 +/- 0.0000223 AU n' = 0.06190529 +/- 0.00000033 P = 15.921 +/- 0.0000843 years The predicted orbit for the 2029 return is as follows: T = 2029 Mar. 17.66316 TT Epoch = 2029 Mar. 5.0 TT Peri. = 35.34161 e = 0.5408875 Node = 225.33859 (2000.0) a = 6.2915008 AU Inc. = 14.83515 n'= 0.06245579 q = 2.8885066 AU P = 15.781 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2012/ 120321 372 0.0 0.2+ 120422 703 0.4- 1.2+ 120316 F51 0.1+ 0.0 120321 372 1.1- 0.6+ 120428 D95 0.4- 0.6+ 120316 F51 0.1+ 0.1+ 120321 372 0.2+ 0.5+ 120428 D95 0.8+ 0.1- 120316 F51 0.1+ 0.0 120324 703 1.2- 0.1+ 120517 215 0.5- 0.3- 120316 F51 0.1+ 0.1- 120324 703 1.2- 0.9+ 120517 215 0.4- 0.4- 120317 291 0.2+ 0.1- 120324 703 1.1- 1.3+ 120517 215 0.2- 0.5- 120317 291 0.1- 0.0 120324 703 0.7- 0.1+ 120706 E07 0.1+ 0.4- 120317 291 0.2+ 0.3- 120324 349 0.1- 1.0+ 120706 E07 0.3+ 0.9- 120317 568 0.0 0.1- 120324 349 0.1+ 0.7+ 2013/ 120317 568 0.0 0.1- 120413 F51 0.1- 0.0 130210 H06 0.1- 0.0 120317 568 0.0 0.1- 120413 F51 0.0 0.0 130210 H06 0.0 0.1- 120318 H06 0.5+ 0.4+ 120413 F51 0.1- 0.0 130210 H06 0.1- 0.4+ 120318 H06 0.9+ 0.4+ 120422 703 0.0 0.5- 130210 H06 0.2+ 0.4+ 120320 E07 0.1+ 0.3- 120422 703 0.7+ 1.2- 120320 E07 0.2+ 0.2- 120422 703 0.9+ 0.6- ( ) -------- Rejected Obs.
Associate of Central Bureau for Astronomical Telegrams Syuichi Nakano 2013 Mar. 8