Nakano Note (Nakano wa Kangaeru noda) NK 2738 P/2010 D1 (WISE)

The following improved orbital elements, by S. Nakano, are from 16 observations 2009 Nov. 9 to 2010 Feb. 20. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.45 arc second. This is same orbit in HICQ 2010. Epoch = 2009 June 18.0 TT T = 2009 June 25.61004 +/- 0.05485 (m.e.) TT Peri. = 225.90652 +/- 0.01774 Node = 160.90054 +/- 0.00121 (2000.0) Inc. = 9.64707 +/- 0.00005 q = 2.6690110 +/- 0.0001729 AU e = 0.3565231 +/- 0.0000859 a = 4.1477963 +/- 0.0001484 AU n' = 0.11667504 +/- 0.00000626 P = 8.447 +/- 0.0004535 years (+/- 0.17 day) The predicted orbit for the 2017 return is as follows: T = 2017 Dec. 18.82813 TT Epoch = 2018 Jan. 2.0 TT Peri. = 226.14201 e = 0.3544074 Node = 160.80759 (2000.0) a = 4.1661281 AU Inc. = 9.62964 n'= 0.11590579 q = 2.6896215 AU P = 8.504 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2009/ 091210 703 0.8- 0.2+ 100218 C51 (8.7- 1.3+) 091109 703 0.2- 0.4- 2010/ 100219 291 0.3- 0.2- 091109 703 0.2- 0.0 100217 C51 (4.3- 1.6-) 100219 291 0.1- 0.1- 091109 703 0.1- 0.8- 100217 C51 1.6- 0.7- 100219 291 0.5+ 0.0 091109 703 0.6+ 0.9+ 100217 C51 (3.2- 1.2+) 100220 568 0.1- 0.1+ 091210 703 0.1+ 1.3+ 100217 C51 (3.3- 2.7+) 100220 568 0.1+ 0.1- 091210 703 1.3+ 0.4- 100217 C51 (1.1+ 3.4+) 100220 568 0.1+ 0.1+ 091210 703 0.6- 0.6- 100218 C51 0.0 0.3+ ( ) -------- Rejected Obs.

Associate of the CBAT Late edition Syuichi Nakano 2010 May 15

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