Nakano Note (Nakano wa Kangaeru noda) NK 3391 P/2014 XK6

The following improved orbital elements, by S. Nakano, are from 39 observations 2014 Apr. 4 to 2015 Jan. 10. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.23 arc second. The object has passed 0.12 AU from Earth on 2014 Oct. 29.8 UT. Epoch = 2014 Sept.20.0 TT T = 2014 Sept.22.22429 +/- 0.00005 (m.e.) TT Peri. = 321.87332 +/- 0.00007 Node = 6.59786 +/- 0.00004 (2000.0) Inc. = 14.02059 +/- 0.00003 q = 0.7073017 +/- 0.0000010 AU e = 0.7388128 +/- 0.0000027 a = 2.7080261 +/- 0.0000106 AU n' = 0.22116928 +/- 0.00000130 P = 4.456 +/- 0.0000262 years The predicted orbit for the 2019 return is as follows: T = 2019 Mar. 10.08563 TT Epoch = 2019 Mar. 18.0 TT Peri. = 321.92720 e = 0.7368210 Node = 6.53723 (2000.0) a = 2.7136484 AU Inc. = 14.01099 n'= 0.22048229 q = 0.7141751 AU P = 4.470 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2014/ 141211 291 0.1+ 0.1+ 141222 H21 0.5- 0.2- 140404 F51 0.3+ 0.1+ 141211 291 0.0 0.2- 141226 H21 0.1- 0.3+ 140404 F51 0.2- 0.1- 141218 204 0.1- 0.5- 141226 H21 0.1- 0.0 140404 F51 0.1- 0.1- 141218 204 0.2- 0.0 141226 H21 0.1+ 0.4+ 141103 C51 0.2+ 0.2- 141219 291 0.0 0.2+ 141228 926 0.3+ 0.2+ 141208 F51 0.0 0.0 141219 291 0.0 0.1+ 141228 926 0.1+ 0.1+ 141208 F51 0.1+ 0.1+ 141221 H21 0.3- 0.2- 141228 926 0.2- 0.3+ 141208 F51 0.1- 0.0 141221 H21 0.2- 0.2+ 2015/ 141208 F51 0.1+ 0.0 141221 H21 0.0 0.2- 150107 705 0.1+ 0.0 141208 J95 0.2- 0.0 141222 H21 0.1- 0.3+ 150107 705 0.1+ 0.2+ 141208 J95 0.4+ 0.0 141222 H21 0.3- 0.1+ 150107 705 0.2- 0.3- 141208 J95 0.8+ 0.0 141222 H21 0.1- 0.2- 150110 291 0.4- 0.2- 141210 291 0.2+ 0.1+ 141222 H21 0.4- 0.1- 150110 291 0.5+ 0.1- 141210 291 0.2+ 0.2+ 141222 H21 0.2- 0.5- ( ) -------- Rejected Obs.

Associate of the CBAT Syuichi Nakano 2017 Sept. 2

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