Nakano Note (Nakano wa Kangaeru noda) NK 4817 P/Christensen (2007 A2 = 2006 WY182 = 2022 Sx)
The following improved orbital elements, by S. Nakano, are from 103 observations 2006 to 2022. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.59 arc second. Residuals for the recovery observations were +12'.7 for Right Ascension and -11'.9 for Declination from the prediction in NK 1669 with the delta-T correction = -1.33 days. No identical object in the past except the known identification of 2007 A2 = 2006 WY182. See the previous orbits in YC 2543 and NK 1669. Epoch = 2022 Dec. 7.0 TT T = 2022 Nov. 27.53226 +/- 0.00912 (m.e.) TT Peri. = 186.69619 +/- 0.00235 Node = 300.91269 +/- 0.00007 (2000.0) Inc. = 26.48294 +/- 0.00018 q = 2.7985037 +/- 0.0000109 AU e = 0.5583939 +/- 0.0000017 a = 6.3371042 +/- 0.0000349 AU n' = 0.06178283 +/- 0.00000051 P = 15.953 +/- 0.0001318 years (+/- 0.05 day) T = 2007 Jan. 17.89527 TT Epoch = 2007 Jan. 20.0 TT Peri. = 186.98349 e = 0.5585053 Node = 301.04499 (2000.0) a = 6.3336901 AU Inc. = 26.49007 n'= 0.06183279 q = 2.7962904 AU P = 15.940 years The predicted orbit for the 2038 return is as follows: T = 2038 Dec. 6.66869 TT Epoch = 2038 Dec. 3.0 TT Peri. = 186.56851 e = 0.5605402 Node = 300.89476 (2000.0) a = 6.4016317 AU Inc. = 26.41550 n'= 0.06085105 q = 2.8132600 AU P = 16.197 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2006/ 070113 215 1.5+ 0.7- 070205 104 0.0 1.3- 061124 G96 0.6+ 0.1+ 070113 A13 0.9- 0.0 070205 104 0.7- 1.6+ 061124 G96 0.6+ 0.4- 070113 A13 1.5- 0.1+ 070205 104 0.3+ 0.4+ 061124 G96 0.5+ 0.3- 070113 A13 1.4- 1.0- 070208 673 0.4+ 0.3- 061124 G96 0.1+ 0.1- 070113 213 0.7- 0.1+ 070208 673 0.3- 0.0 061125 G96 0.4+ 0.5- 070114 213 0.7- 0.1+ 070208 673 0.2+ 0.2+ 061125 G96 0.4- 0.0 070114 213 1.0- 0.1+ 070208 673 0.3+ 0.3- 061125 G96 0.3+ 0.5- 070114 232 0.8- 1.4+ 070210 213 0.0 0.2+ 061125 G96 0.0 0.5- 070114 232 1.2- 1.1+ 070210 213 0.2+ 0.5+ 2007/ 070114 232 0.6- 0.9+ 070210 213 0.0 0.0 070110 G96 0.3+ 0.3- 070114 372 0.1+ 0.8+ 070215 215 1.0+ 0.3- 070110 G96 0.1+ 0.2- 070114 349 0.4+ 0.2- 070216 104 0.1- 1.7+ 070110 G96 0.0 0.1- 070114 349 0.5+ 0.2- 070216 104 0.3+ 0.3- 070110 G96 0.2+ 0.2- 070114 372 0.4+ 0.0 070216 104 1.2+ 0.2- 070110 G96 0.3+ 0.2- 070114 349 0.3+ 0.3- 070217 703 0.1- 0.4+ 070110 G96 0.4+ 0.1- 070115 246 1.1+ 1.1+ 070217 703 0.6+ 0.3+ 070110 G96 0.0 0.2- 070115 246 0.5- 1.5+ 070217 703 0.2+ 0.3- 070110 G96 0.2- 0.0 070115 246 0.2+ 0.4+ 070217 703 0.3+ 1.3+ 070110 G96 0.0 0.2- 070115 246 0.3- 0.7+ 070223 213 0.5+ 1.1- 070110 G96 0.4+ 0.4- 070117 683 0.3- 0.2+ 070223 213 0.7+ 1.0- 070110 G96 0.1+ 0.1+ 070117 683 0.9+ 1.8- 070223 213 0.8+ 1.0- 070110 G96 0.3+ 0.0 070117 683 0.4- 1.1- 070313 213 0.2+ 0.3- 070112 J95 0.4- 0.0 070118 372 1.4- 0.5- 070313 213 0.1+ 0.2- 070112 J95 0.6+ 0.4+ 070119 213 0.4+ 0.2- 070313 213 0.2+ 0.3- 070112 J95 0.5- 0.3- 070119 213 0.5+ 0.3- 070317 170 0.6+ 0.9- 070112 J87 0.5+ 0.3+ 070119 213 0.4+ 0.3- 070317 170 0.6+ 0.7- 070112 J87 0.1- 0.5- 070119 130 0.3- 0.2+ 070317 170 0.2+ 0.4- 070112 J87 0.2- 0.8+ 070120 130 0.7+ 0.7+ 070317 170 0.4+ 0.2- 070112 A13 (9.8+ 0.3-) 070120 204 0.0 0.0 2022/ 070112 A13 0.1+ 0.7+ 070120 204 0.5- 0.4+ 220927 Z84 0.4+ 0.8+ 070112 A13 0.8- 0.0 070125 703 1.1- 0.9+ 220927 Z84 0.4- 0.3+ 070113 176 0.3- 0.1+ 070125 703 0.9- 0.3+ 220927 Z84 0.6+ 0.0 070113 176 0.4- 0.2+ 070125 703 1.3- 0.3- 221001 Z84 0.8+ 0.1- 070113 176 0.4- 0.1+ 070125 703 1.0- 0.2- 221001 Z84 0.4- 0.3+ 070113 176 0.5- 0.2+ 070203 J95 0.5+ 0.6- 221001 Z84 0.1+ 0.2- 070113 176 0.5- 0.2+ 070204 J95 0.1+ 0.3- ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2022 Oct. 2