Nakano Note (Nakano wa Kangaeru noda) NK 2016 P/2010 P4 (WISE)

The following improved orbital elements, by S. Nakano, are from 56 observations 2010 Aug. 6 to Nov. 8. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.59 arc second. See an orbit on HICQ 2010/2011. Epoch = 2010 July 23.0 TT T = 2010 July 6.07789 +/- 0.00133 (m.e.) TT Peri. = 354.24693 +/- 0.00079 Node = 2.21300 +/- 0.00035 (2000.0) Inc. = 24.10163 +/- 0.00025 q = 1.8564752 +/- 0.0000148 AU e = 0.4987476 +/- 0.0000231 a = 3.7036732 +/- 0.0000468 AU n' = 0.13827864 +/- 0.00000262 P = 7.128 +/- 0.0001350 years (+/- 0.05 day) The predicted orbit for the 2017 return is as follows: T = 2017 Aug. 18.49202 TT Epoch = 2017 Sept. 4.0 TT Peri. = 354.15516 e = 0.4978889 Node = 2.23359 (2000.0) a = 3.7058055 AU Inc. = 24.07867 n'= 0.13815931 q = 1.8607259 AU P = 7.134 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2010/ 100812 H21 0.5+ 0.4- 101007 H06 0.1+ 0.5- 100806 C51 0.7+ 0.9- 100812 H21 1.4+ 0.3+ 101007 H06 0.1+ 0.4- 100806 C51 0.6+ 1.1- 100812 H21 0.2+ 0.7+ 101007 H06 0.3+ 0.3- 100806 C51 0.2- 0.8+ 100812 291 0.6+ 0.3+ 101010 215 0.0 0.2- 100806 C51 0.3- 0.1+ 100812 291 0.1+ 0.5+ 101012 H06 0.5- 0.1- 100807 C51 0.6- 1.8- 100812 291 1.6- 0.1+ 101012 H06 0.2- 0.1- 100807 C51 1.2+ 0.0 100813 H36 0.9- 0.4- 101012 H06 0.1+ 0.3- 100807 C51 0.9- 0.2- 100813 H36 (0.0 3.2-) 101018 F65 0.3+ 0.3+ 100807 C51 0.3+ 1.4- 100813 291 0.8- 1.0+ 101018 F65 0.4- 0.1- 100807 C51 0.2+ 0.4- 100813 291 0.8- 0.5+ 101018 F65 0.2+ 0.1+ 100807 C51 0.4+ 0.7+ 100813 291 1.1- 0.3+ 101029 F65 0.2+ 0.2+ 100807 C51 1.4- 0.3+ 100816 H21 0.6+ 0.3- 101029 F65 0.4+ 0.3+ 100807 C51 0.4+ 0.6- 100816 H21 0.2+ 0.3- 101029 F65 0.2+ 0.2+ 100807 C51 (4.6+ 1.6+) 100912 H06 0.4+ 0.3+ 101029 F65 0.2+ 0.4+ 100807 C51 0.2+ 0.7+ 100912 H06 1.0+ 1.0+ 101031 585 0.0 0.5+ 100807 C51 (2.2+ 0.2-) 101006 H06 0.3- 0.7- 101031 585 0.6+ 0.8- 100808 C51 0.2+ 0.5+ 101006 H06 0.5- 0.6- 101031 585 0.3- 0.6+ 100811 291 0.8+ 0.7+ 101006 H06 0.7- 0.6- 101108 F65 0.5- 0.5- 100811 291 0.3+ 0.5+ 101006 F65 0.1- 0.4+ 101108 F65 0.1+ 0.2+ 100811 291 0.6- 0.0 101006 F65 0.2+ 0.5+ 101108 F65 0.5- 0.0 ( ) -------- Rejected Obs.

Associate of Central Bureau for Astronomical Telegrams Syuichi Nakano 2010 Nov. 29

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