Nakano Note (Nakano wa Kangaeru noda) NK 2625 P/2013 C2 (Tenagra)

The following improved orbital elements, by S. Nakano, are from 118 observations 2013 Feb. 14 to 2014 Feb. 21. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.52 arc second. An orbit in NK 2578 shows the residual of -2" mainly in R. A. for the recent observations and see an orbit in HICQ 2013. Epoch = 2015 Sept.15.0 TT T = 2015 Aug. 30.22171 +/- 0.35360 (m.e.) TT Peri. = 308.78810 +/- 0.01710 Node = 247.52466 +/- 0.00071 (2000.0) Inc. = 21.33915 +/- 0.00004 q = 9.1311721 +/- 0.0004730 AU e = 0.4315509 +/- 0.0000697 a = 16.0633053 +/- 0.0001331 AU n' = 0.01530917 +/- 0.00000019 P = 64.380 +/- 0.0008003 years (+/- 0.29 day) The predicted orbit for the 2079 return is as follows: T = 2079 Feb. 12.51178 TT Epoch = 2079 Feb. 11.0 TT Peri. = 309.14297 e = 0.4287229 Node = 247.49289 (2000.0) a = 15.9879903 AU Inc. = 21.34502 n'= 0.01541748 q = 9.1335730 AU P = 63.928 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2013/ 130217 448 0.0 0.1- 130401 H45 0.8+ 0.7- 130214 926 0.1+ 0.9+ 130217 926 0.3- 0.2+ 130401 H45 0.9+ 1.0- 130214 926 1.1+ 0.0 130217 850 1.7- 1.9+ 130402 926 0.5- 0.3- 130214 926 0.6+ 0.3- 130217 926 0.6+ 0.1- 130402 926 0.4- 0.1- 130214 B74 0.1+ 0.1- 130217 850 1.0- 0.7+ 130402 926 1.2- 0.5+ 130214 B74 0.2- 0.0 130217 850 0.2- 0.1- 130406 A32 0.2- 0.2- 130214 J95 0.2- 0.0 130217 E23 1.5- 1.1- 130406 A32 0.7+ 1.4+ 130214 B74 0.2- 0.1- 130217 E23 0.5- 0.3- 130406 A32 1.5+ 1.4+ 130215 J95 0.1+ 0.4+ 130217 E23 0.5+ 0.1+ 130412 E07 0.2+ 0.4- 130215 B74 0.1- 0.1- 130217 E23 1.0- 0.4- 130412 E07 0.4- 0.7- 130215 W85 0.2+ 0.2- 130217 E23 1.2- 0.1- 130415 215 (1.1- 2.1+) 130215 W85 0.1+ 0.2- 130218 C10 0.2+ 0.2+ 130415 215 0.5- 0.6+ 130215 W85 0.3+ 0.2- 130218 C10 0.1- 0.0 130415 215 1.3- 0.3- 130215 W85 0.1+ 0.2- 130218 926 0.3- 0.1- 130603 E07 0.5- 0.1+ 130215 W85 0.2+ 0.2- 130218 926 0.1- 0.1- 130603 E07 0.5- 0.4- 130215 W85 0.2+ 0.2- 130218 926 0.2- 0.1- 130702 W96 0.2- 0.6+ 130215 926 0.0 0.3+ 130219 926 0.3+ 0.4- 130702 W96 (2.7- 1.5+) 130215 W85 0.2+ 0.3- 130219 926 0.5+ 0.2+ 131113 Q62 0.0 0.2- 130215 926 0.3+ 0.2- 130219 926 0.4+ 0.5+ 131113 Q62 0.1+ 0.5- 130215 926 0.5+ 0.4+ 130220 Q62 0.4+ 0.1- 131113 Q62 0.4+ 0.8- 130215 926 0.1- 0.1- 130220 Q62 0.3- 0.3- 131125 W96 (2.6+ 7.2-) 130215 926 0.7+ 0.4- 130220 Q62 0.0 0.3- 131125 W96 0.4- 0.4- 130215 926 0.3+ 0.4- 130220 Q62 0.3+ 0.5+ 131228 D90 0.0 0.0 130215 H06 0.8+ 0.4- 130220 Q62 0.5+ 0.2+ 131228 D90 0.0 0.1- 130215 H06 0.1+ 0.4- 130224 349 1.2+ 0.2+ 131228 D90 0.2+ 0.1- 130215 D90 0.1+ 0.0 130224 349 0.4+ 1.3+ 2014/ 130215 D90 0.1- 0.0 130301 D90 0.3+ 0.7+ 140107 D90 0.3+ 0.1- 130215 D90 0.0 0.1+ 130301 D90 0.1- 0.8+ 140107 D90 0.2+ 0.2- 130216 291 0.1- 0.3- 130301 D90 0.9+ 0.5+ 140107 D90 0.2+ 0.1- 130216 291 0.3+ 0.2+ 130306 E07 0.1- 0.2- 140122 349 0.6- 0.7+ 130216 H06 0.5- 0.1- 130306 E07 0.2- 0.2- 140122 349 0.0 1.6+ 130216 H06 1.7- 0.5- 130308 E07 0.4- 0.2+ 140125 D90 0.4+ 0.4- 130216 H06 0.1- 0.1- 130308 E07 0.3- 0.4- 140125 D90 0.0 0.3+ 130216 926 0.8- 0.3+ 130329 D90 0.2+ 0.2- 140125 D90 0.2- 0.4+ 130216 926 0.5- 0.4- 130329 D90 0.4+ 0.1- 140131 W96 0.3+ 0.5- 130216 I93 0.3- 0.7+ 130329 D90 0.2- 0.3- 140131 W96 0.3+ 0.5- 130216 I93 0.0 0.1- 130331 E07 0.5- 0.3- 140207 W96 0.2- 0.4- 130217 I93 0.1+ 0.5- 130331 E07 0.1- 0.5- 140207 W96 0.3- 0.4- 130217 448 1.0+ 0.1+ 130401 H45 0.6+ 0.0 140221 W96 0.2- 0.1- 130217 926 0.4- 0.7+ 130401 H45 0.7+ 0.3- 140221 W96 0.2+ 0.0 130217 448 0.1- 0.0 130401 H45 0.6+ 0.4- 140221 W96 0.4- 1.2+ ( ) -------- Rejected Obs.

Associate of the CBAT Syuichi Nakano 2014 Mar. 3

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