Nakano Note (Nakano wa Kangaeru noda) NK 2557 P/2011 P2 (PANSTARRS)
The following improved orbital elements, by S. Nakano, are from 53 observations 2011 June 22 to 2013 Sept. 12. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.34 arc second. The 2013 observations show the residuals of +46" for R. A. and +17" for Decl. from an orbit in HICQ 2013. Epoch = 2010 Sept. 1.0 TT T = 2010 Sept.13.37768 +/- 0.09011 (m.e.) TT Peri. = 76.36565 +/- 0.00908 Node = 204.01366 +/- 0.00047 (2000.0) Inc. = 8.98948 +/- 0.00006 q = 6.1475358 +/- 0.0002977 AU e = 0.3713539 +/- 0.0000661 a = 9.7790085 +/- 0.0001158 AU n' = 0.03223011 +/- 0.00000057 P = 30.580 +/- 0.0005432 years (+/- 0.20 day) The predicted orbit for the 2041 return is as follows: T = 2041 Jan. 21.13386 TT Epoch = 2041 Feb. 10.0 TT Peri. = 76.05063 e = 0.3708370 Node = 203.82598 (2000.0) a = 9.7870900 AU Inc. = 8.98989 n'= 0.03219020 q = 6.1576748 AU P = 30.618 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2011/ 110807 J95 0.2+ 0.2- 110827 215 0.3+ 0.2- 110622 691 0.0 0.4+ 110807 J95 0.9+ 0.7- 110827 215 0.8- 1.0- 110622 691 0.0 0.4+ 110807 H06 0.1- 0.3+ 2012/ 110622 691 0.2- 0.6+ 110807 H06 0.1+ 0.0 120911 H06 (4.0- 1.8+) 110803 F51 0.2+ 0.0 110807 H06 0.1+ 0.1- 120911 H06 (4.9- 1.3+) 110803 F51 0.3+ 0.1+ 110807 568 0.0 0.0 2013/ 110803 F51 0.1- 0.3- 110807 568 0.1- 0.1+ 130815 F51 0.0 0.1+ 110804 568 0.1- 0.0 110807 568 0.1- 0.0 130815 F51 0.2- 0.0 110804 568 0.1- 0.1- 110807 568 0.1- 0.1+ 130815 F51 0.1+ 0.0 110804 568 0.1- 0.0 110807 568 0.0 0.2+ 130815 F51 0.1+ 0.1- 110804 568 0.0 0.0 110807 568 0.1- 0.0 130903 F51 0.1- 0.0 110804 568 0.0 0.0 110807 568 0.1- 0.1+ 130903 F51 0.3+ 0.1- 110805 F65 0.2+ 0.2- 110821 E07 0.0 0.2- 130903 F51 0.0 0.1+ 110805 F65 0.1+ 0.1- 110821 E07 0.4- 0.5- 130903 F51 0.2+ 0.1+ 110805 F65 0.0 0.2- 110824 E07 0.2+ 0.5- 130912 G96 0.7- 0.1- 110805 F65 0.2+ 0.1- 110824 E07 0.2+ 0.1- 130912 G96 1.1- 0.3- 110805 F65 0.1+ 0.2- 110825 H06 0.1+ 0.4+ 130912 G96 1.0- 0.2- 110805 D90 0.4- 0.0 110825 H06 0.1+ 0.4+ 130912 G96 0.7- 0.4+ 110805 D90 0.7+ 0.1- 110825 H06 0.4+ 0.3+ 110805 D90 0.2- 0.3- 110827 215 1.4+ 0.4+ ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2013 Sept. 18