Nakano Note (Nakano wa Kangaeru noda) NK 2207 P/2011 UA134 (Spacewatch-PANSTARRS)
The following improved orbital elements, by S. Nakano, are from 122 observations 2011 Oct. 24 to 2012 Jan. 26. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.50 arc second. Epoch = 2011 Dec. 25.0 TT T = 2011 Dec. 7.19610 +/- 0.00407 (m.e.) TT Peri. = 32.32431 +/- 0.00194 Node = 40.63671 +/- 0.00034 (2000.0) Inc. = 10.53875 +/- 0.00020 q = 2.0514334 +/- 0.0000207 AU e = 0.6325686 +/- 0.0000131 a = 5.5831743 +/- 0.0000371 AU n' = 0.07471061 +/- 0.00000074 P = 13.192 +/- 0.0001313 years (+/- 0.05 day) The predicted orbit for the 2025 return is as follows: T = 2025 Feb. 16.64949 TT Epoch = 2025 Feb. 14.0 TT Peri. = 32.41077 e = 0.6306155 Node = 40.38623 (2000.0) a = 5.6181401 AU Inc. = 10.43893 n'= 0.07401423 q = 2.0752542 AU P = 13.316 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2011/ 111123 703 (2.3- 0.1-) 111203 J47 0.5- 0.1+ 111024 691 0.9- 0.2- 111123 349 0.1- 0.3+ 111203 J47 0.1+ 1.1+ 111024 691 0.4- 0.4+ 111123 349 0.3+ 0.3+ 111203 D29 1.5- 1.1+ 111024 691 1.3- 0.1- 111123 349 0.3+ 0.1- 111203 D29 0.3+ 0.9- 111025 F51 0.1+ 0.1- 111124 568 0.1+ 0.1+ 111203 D29 0.1- 0.9- 111025 F51 0.2+ 0.2- 111124 568 0.1+ 0.1+ 111204 J01 0.1- 0.1+ 111025 F51 0.1+ 0.2- 111124 568 0.1+ 0.1+ 111204 J01 0.2+ 0.1- 111025 F51 0.3+ 0.1- 111125 300 0.4+ 0.1- 111204 J01 0.5+ 0.6- 111026 926 0.5+ 0.3+ 111125 300 0.5+ 0.2- 111205 C32 0.6- 0.8- 111026 926 0.1- 1.5+ 111125 300 0.0 0.1- 111205 C32 0.1- 1.4- 111026 926 0.4+ 0.6+ 111125 300 0.3+ 0.1+ 111205 C32 0.6- 0.7- 111026 926 0.5- 0.5+ 111125 D29 0.2- 0.3- 111216 C32 0.3- 0.8+ 111026 926 0.5+ 0.4+ 111125 D29 1.0- 1.1- 111216 C32 0.2+ 0.0 111026 926 0.3+ 0.3- 111125 D29 0.2- 0.2- 111217 J24 1.7- 1.4- 111026 926 0.2+ 0.1- 111127 703 1.7- 1.6- 111217 J24 0.8- 1.4- 111026 568 0.0 0.1+ 111127 703 (2.2- 0.7-) 111217 J24 0.1+ 0.9- 111026 568 0.0 0.1+ 111127 703 1.2- 0.5+ 111220 118 0.1- 0.1- 111026 568 0.0 0.1+ 111127 703 1.3- 1.4- 111220 118 1.4- 0.1- 111026 568 0.1+ 0.1+ 111127 215 0.8- 0.7- 111220 561 0.2- 0.3- 111026 568 0.0 0.1+ 111127 215 0.7- 0.8- 111220 561 0.3+ 0.2- 111026 568 0.0 0.1+ 111127 215 0.6- 0.9- 111220 561 0.1+ 0.2+ 111029 204 0.3- 0.2- 111127 A71 0.5- 0.9+ 111220 561 0.1+ 0.3+ 111029 204 0.2- 0.1- 111127 A71 0.4- 0.2- 111220 561 1.1+ 0.3+ 111029 B18 0.2+ 0.4- 111129 046 0.2- 0.1+ 111224 D88 1.0+ 1.2- 111029 B18 0.0 0.4+ 111129 046 0.3+ 0.3+ 111224 D88 0.1+ 1.1+ 111029 B18 0.4- 0.8+ 111129 046 0.2+ 0.5+ 111224 349 1.0+ 0.2+ 111030 H21 0.0 0.1- 111129 046 0.4- 0.4- 111224 372 0.4+ 0.1+ 111030 H21 0.6- 0.0 111129 046 0.2- 0.1+ 111224 349 1.0+ 0.7+ 111030 H21 0.2- 0.2- 111129 046 0.2+ 0.1- 111224 372 0.3+ 0.3- 111030 H21 0.1- 0.2- 111129 046 0.7- 0.8- 111224 372 0.9- 0.5+ 111030 H06 0.3- 0.9- 111129 G96 0.3- 0.3- 111226 D95 0.5+ 0.7+ 111030 H06 0.7- 0.5- 111129 G96 0.0 0.2- 111226 D95 0.8- 0.0 111031 C32 0.2- 0.2+ 111129 G96 0.0 0.2- 111227 130 0.3- 0.7+ 111031 C32 0.3- 0.1+ 111130 H45 (0.6+ 3.2-) 111227 130 0.3+ 0.3+ 111031 C32 0.2- 0.3+ 111130 H45 1.3+ 0.6- 111227 130 0.1+ 0.1+ 111103 C32 0.5- 0.4- 111130 H45 0.9+ 0.5+ 2012/ 111103 C32 0.6+ 0.8+ 111130 H45 0.6+ 1.1+ 120111 G96 0.0 1.4+ 111103 C32 0.1- 0.3+ 111130 H45 0.6+ 0.2+ 120111 G96 1.0- 0.9+ 111103 C32 0.6- 0.1- 111130 H45 0.5+ 0.9+ 120111 G96 0.2+ 0.5+ 111123 H06 0.3+ 0.0 111202 I89 0.9+ 0.1+ 120126 215 0.8+ 0.9- 111123 H06 0.4+ 0.3- 111202 I89 0.9+ 0.8+ 120126 215 1.0+ 0.5- 111123 H06 0.4+ 0.2- 111203 J47 0.5- 0.1- 111123 703 0.2+ 1.0+ 111203 J47 0.7- 0.1+ ( ) -------- Rejected Obs.
Associate of Central Bureau for Astronomical Telegrams Syuichi Nakano 2012 Feb. 7