Nakano Note (Nakano wa Kangaeru noda) NK 2116 P/2010 JC81 (WISE)

The following improved orbital elements, by S. Nakano, are from 61 observations 2010 May 10 to 2011 Aug. 7. 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. Epoch = 2011 Apr. 29.0 TT T = 2011 Apr. 26.56093 +/- 0.00038 (m.e.) TT Peri. = 12.57217 +/- 0.00014 Node = 30.76793 +/- 0.00004 (2000.0) Inc. = 38.68998 +/- 0.00002 q = 1.8107274 +/- 0.0000009 AU e = 0.7775886 +/- 0.0000046 a = 8.1413423 +/- 0.0000209 AU n' = 0.04242873 +/- 0.00000016 P = 23.230 +/- 0.0000892 years (+/- 0.03 day) The predicted orbit for the 2034 return is as follows: T = 2034 May 30.64403 TT Epoch = 2034 June 7.0 TT Peri. = 12.36867 e = 0.7782013 Node = 30.62604 (2000.0) a = 8.1779588 AU Inc. = 38.63563 n'= 0.04214409 q = 1.8138605 AU P = 23.387 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2010/ 101102 E12 0.2+ 0.2- 101217 F65 0.0 0.1+ 100510 C51 0.8- 0.1- 101102 E12 0.0 0.2- 101217 F65 0.1- 0.1+ 100510 C51 0.2- 0.0 101102 E12 0.1+ 0.2- 101217 F65 0.1- 0.1+ 100511 C51 0.0 0.4+ 101102 E12 0.1+ 0.3- 101217 F65 0.0 0.0 100511 C51 0.1+ 0.4+ 101102 E12 0.0 0.2- 2011/ 100511 C51 0.7- 0.6+ 101103 E12 0.2+ 0.3- 110801 095 (4.4+ 2.5+) 100511 C51 0.0 0.4+ 101103 E12 0.2+ 0.3- 110801 095 0.5- 1.2+ 100511 C51 0.1- 0.9+ 101104 D90 0.1+ 0.1+ 110801 095 1.6- 1.9+ 100511 C51 0.2- 0.3+ 101104 D90 0.2+ 0.2+ 110803 095 0.3+ 0.2- 100511 C51 0.0 0.1+ 101104 D90 0.2+ 0.3+ 110803 095 0.1+ 0.0 100511 C51 0.1+ 0.2+ 101104 E12 0.1+ 0.3- 110803 095 0.1+ 0.2- 100511 C51 0.2- 0.0 101104 E12 0.1+ 0.2- 110805 095 0.8- 0.8- 100511 C51 0.1- 0.4+ 101105 E12 0.1+ 0.3- 110805 095 0.4+ 0.5- 100512 C51 0.0 0.1- 101105 E12 0.1+ 0.1- 110805 095 1.5- 0.2+ 100512 C51 0.2+ 0.5- 101105 D96 0.5- 0.6- 110807 H06 0.6+ 0.4- 100829 E12 0.5+ 0.1- 101105 D96 0.7- 0.3- 110807 H06 0.8+ 0.4- 100829 E12 0.3+ 0.1- 101105 D90 0.0 0.2- 110807 H06 0.4+ 0.2- 100829 E12 0.2+ 0.2+ 101105 D90 0.2+ 0.1- 110807 349 0.4+ 0.2+ 100829 E12 0.2+ 0.3- 101105 D90 0.5+ 0.0 110807 349 0.5+ 0.1- 101102 E12 0.1- 0.1- 101105 D96 0.6- 0.4- 110807 349 0.2+ 0.2+ 101102 E12 0.2+ 0.2- 101217 F65 0.1- 0.0 101102 E12 0.1+ 0.1- 101217 F65 0.1+ 0.1- ( ) -------- Rejected Obs.

Associate of Central Bureau for Astronomical Telegrams Syuichi Nakano 2011 Aug. 9

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