Nakano Note (Nakano wa Kangaeru noda) NK 2644 P/2014 A2 (Hill)
The following improved orbital elements, by S. Nakano, are from 103 observations 2013 Nov. 9 to 2014 Feb. 23. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.67 arc second. Epoch = 2013 Nov. 4.0 TT T = 2013 Oct. 28.36443 +/- 0.00225 (m.e.) TT Peri. = 356.23719 +/- 0.00116 Node = 106.67194 +/- 0.00033 (2000.0) Inc. = 24.51336 +/- 0.00029 q = 2.0747187 +/- 0.0000148 AU e = 0.6499484 +/- 0.0000228 a = 5.9268937 +/- 0.0000655 AU n' = 0.06830671 +/- 0.00000113 P = 14.429 +/- 0.0002391 years (+/- 0.09 day) The predicted orbit for the 2028 return is as follows: T = 2028 Mar. 14.78851 TT Epoch = 2028 Mar. 10.0 TT Peri. = 356.33401 e = 0.6463515 Node = 106.62328 (2000.0) a = 5.9100692 AU Inc. = 24.56299 n'= 0.06859860 q = 2.0900870 AU P = 14.368 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2013/ 140110 H06 1.3+ 0.6+ 140115 C95 0.1+ 0.2+ 131109 G96 0.1- 0.0 140110 926 0.0 0.5- 140120 349 0.5+ 1.2+ 131109 G96 0.5+ 0.2- 140110 926 0.5+ 0.0 140120 349 0.5- 0.2+ 131109 G96 0.2+ 0.2- 140110 926 0.5+ 0.3+ 140120 213 0.2- 0.5- 2014/ 140110 291 0.9+ 0.2+ 140120 213 0.2- 0.4- 140109 703 1.5- 0.9- 140110 291 0.8+ 0.1+ 140120 213 0.5- 0.1- 140109 703 1.1- 0.5- 140110 291 1.0+ 0.0 140125 H45 (2.1+ 1.5-) 140109 703 1.3- 0.6- 140110 900 0.3+ 0.8+ 140125 H45 1.8+ 0.4- 140109 703 1.6- 0.9- 140110 900 0.1- 0.0 140125 H45 1.3+ 0.4- 140109 703 0.9- 0.6- 140111 H06 0.3+ 0.0 140125 H45 0.8+ 0.9+ 140109 703 0.8- 0.5+ 140111 H06 0.2- 0.6- 140125 H45 0.8+ 1.1+ 140109 703 1.5- 0.9+ 140111 G96 0.1+ 0.1- 140127 D95 0.8+ 1.5+ 140109 G96 0.6+ 0.0 140111 G96 0.7- 0.2- 140127 D95 1.3+ 0.2+ 140109 703 (2.3- 0.1-) 140111 G96 0.6- 0.0 140127 372 0.3- 0.5+ 140109 G96 0.1+ 0.0 140111 G96 0.3+ 0.0 140127 372 0.8+ 0.5+ 140109 G96 0.3+ 0.0 140111 291 1.1+ 0.1- 140127 900 1.4- 0.5- 140109 G96 0.6+ 0.2- 140111 291 1.1+ 0.1+ 140127 900 0.2- 1.9- 140110 W96 0.7+ 0.3+ 140111 291 1.1+ 0.1+ 140127 K25 0.3+ 0.0 140110 W96 0.5- 0.7+ 140111 355 0.2- 0.6- 140127 K25 0.6+ 0.3+ 140110 W96 1.1+ 0.1+ 140111 355 0.2+ 0.5- 140129 703 (2.1- 0.5-) 140110 H06 1.2- 1.6- 140111 355 0.3- 0.4- 140129 703 0.1+ 0.8+ 140110 H06 0.0 1.2- 140111 355 0.0 0.1+ 140129 703 0.5+ 0.7- 140110 703 1.6- 0.7+ 140112 958 1.1- 1.3+ 140129 703 0.6+ 0.2+ 140110 703 1.9- 1.6+ 140112 958 0.1- 0.1+ 140131 215 0.3+ 0.4- 140110 703 1.9- 0.2- 140112 958 0.4- 0.4+ 140131 215 0.0 0.2- 140110 703 1.8- 0.4+ 140112 926 0.7+ 0.4+ 140131 215 0.3- 0.0 140110 G96 0.2- 0.3+ 140112 926 0.9+ 0.1- 140206 703 0.2+ 0.1+ 140110 703 0.1- 0.5+ 140112 926 0.7+ 0.3- 140206 703 0.1- 0.7- 140110 G96 0.1+ 0.0 140113 G96 0.6+ 0.2- 140206 703 0.7+ 0.4+ 140110 G96 0.4- 0.1+ 140113 G96 0.0 0.2+ 140207 K25 0.1- 0.4- 140110 G96 0.2- 0.2- 140113 G96 0.1+ 0.2- 140208 K25 0.9- 0.3- 140110 703 0.7- 0.1- 140113 G96 0.3+ 0.3+ 140223 157 0.5- 0.1- 140110 703 0.8+ 0.1+ 140114 H21 0.1- 0.6- 140223 157 0.8- 0.3+ 140110 703 0.0 0.6- 140114 H21 0.2+ 0.4- 140223 K25 0.4- 0.3- 140110 703 (2.2- 0.1-) 140114 H21 0.6+ 0.0 140223 K25 0.7- 0.4- 140110 H06 0.0 0.1+ 140115 C95 0.5- 0.7+ 140110 H06 0.8+ 0.3+ 140115 C95 0.4- 0.3- ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2014 Mar. 4