Nakano Note (Nakano wa Kangaeru noda) NK 4473 P/Christensen (2006 S4 = 2021 Lx)
The following improved orbital elements, by S. Nakano, are from 157 observations 2006 to 2021. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.76 arc second. Residuals for the recovery observations were +5'.8 for Right Ascension and +4'.1 for Declination from the prediction in NK 1430 (= HICQ 2020/2021) with the delta-T correction = -0.55 day. See the previous orbits in YC 2527, YC 2530 and NK 1430. Epoch = 2022 Jan. 21.0 TT T = 2022 Jan. 13.84692 +/- 0.02229 (m.e.) TT Peri. = 305.15699 +/- 0.00354 Node = 36.04813 +/- 0.00014 (2000.0) Inc. = 39.53750 +/- 0.00023 q = 3.1052280 +/- 0.0000463 AU e = 0.5087494 +/- 0.0000066 a = 6.3210673 +/- 0.0001265 AU n' = 0.06201810 +/- 0.00000186 P = 15.892 +/- 0.0004769 years (+/- 0.17 day) T = 2006 June 1.65376 TT Epoch = 2006 May 25.0 TT Peri. = 305.70999 e = 0.5078868 Node = 36.13861 (2000.0) a = 6.2342917 AU Inc. = 39.62727 n'= 0.06331745 q = 3.0679774 AU P = 15.566 years The predicted orbit for the 2037 return is as follows: T = 2037 Sept. 2.69719 TT Epoch = 2037 Sept.19.0 TT Peri. = 304.73939 e = 0.5057419 Node = 35.94081 (2000.0) a = 6.2355130 AU Inc. = 39.65014 n'= 0.06329885 q = 3.0819525 AU P = 15.571 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2006/ 060927 423 0.9- 0.2- 061023 423 0.3- 0.3- 060922 703 0.1+ 1.1- 060927 423 0.9- 0.1- 061023 423 0.1- 0.3- 060922 703 0.8- 0.0 060928 423 1.9- 0.5- 061025 561 1.2+ 0.1+ 060922 703 0.8+ 0.6- 060928 423 0.8- 0.0 061025 561 0.8+ 0.3+ 060922 703 0.7- 0.6- 060929 415 0.3+ 0.5+ 061025 561 0.4+ 0.2- 060922 703 0.9- 0.0 060929 415 0.7+ 0.2- 061026 246 0.3+ 0.8+ 060922 703 0.9+ 0.7+ 060930 808 1.0- 0.1+ 061026 246 0.3+ 1.2+ 060922 E12 0.0 0.6- 060930 808 0.1- 0.7+ 061026 246 0.2+ 0.9+ 060922 E12 0.5- 0.5- 061001 423 1.1- 0.3+ 061026 246 0.1- 0.2+ 060922 585 0.6+ 1.1+ 061001 415 0.6+ 0.0 061026 246 0.2+ 0.6+ 060922 585 1.7- 1.3+ 061001 415 0.1+ 0.2- 061026 246 0.3+ 0.9+ 060922 585 (2.5- 0.3-) 061001 423 0.6- 0.5- 061026 585 1.6+ 0.3+ 060922 246 0.2+ 0.5+ 061002 808 0.9+ 0.0 061026 585 1.1+ 0.1+ 060922 246 0.5- 0.9- 061002 808 1.4+ 1.9- 061026 585 0.4+ 0.4- 060922 246 1.4- 0.1+ 061002 808 (6.3- 4.2-) 061026 585 0.7- 0.6+ 060922 246 1.1- 0.1+ 061003 423 0.2- 1.2+ 061026 585 0.3+ 0.1- 060922 246 1.6- 0.3+ 061003 372 0.5+ 0.7+ 061027 204 0.3+ 0.5+ 060922 246 1.7- 0.4- 061004 423 1.6- 0.9- 061027 204 0.2+ 0.4+ 060923 113 (3.0- 0.2-) 061004 423 0.0 0.7+ 061027 423 0.0 0.4- 060923 113 1.3- 0.6- 061009 415 0.0 0.3- 061027 423 0.3- 0.1- 060923 J95 0.1+ 0.5+ 061009 415 0.2+ 0.3- 061028 423 0.6- 0.4- 060923 J95 0.0 0.4- 061010 423 0.7- 0.1- 061028 423 0.2+ 0.0 060923 J95 0.9- 0.7- 061010 423 0.8- 0.2+ 061028 415 0.9+ 0.5+ 060923 J95 0.2- 0.5- 061010 415 0.6+ 0.5+ 061028 415 0.9+ 0.4+ 060923 J95 0.5- 0.9- 061010 415 0.6+ 0.2+ 061031 703 0.1+ 1.4+ 060923 673 1.2+ 0.3- 061011 423 0.1+ 0.2- 061031 703 0.2+ 0.4- 060923 673 0.9+ 0.1- 061011 423 0.2- 0.1- 061031 703 0.5- 0.6- 060923 673 1.1+ 0.1- 061012 673 0.4+ 0.4- 061031 703 0.8+ 0.4+ 060923 682 1.4- 0.2- 061012 673 0.8+ 0.5- 061031 423 0.0 0.7+ 060923 682 1.4- 0.0 061012 673 1.3+ 0.9+ 061031 423 0.7+ 0.4+ 060923 682 0.2- 0.0 061012 673 0.5+ 0.2+ 061109 104 0.9- 0.7- 060923 415 0.2- 0.1- 061012 423 0.6- 0.1- 061109 104 1.2- 0.5+ 060923 415 0.1- 0.1+ 061012 423 0.7- 0.2+ 061109 104 1.8+ 0.7- 060923 349 0.3- 0.8- 061013 423 1.2- 0.5- 061123 703 1.4+ 1.2- 060923 349 0.6- 0.6- 061013 423 0.2- 0.0 061123 703 0.8+ 1.4- 060923 349 0.6- 0.5- 061015 349 1.7+ 1.5+ 061123 703 0.5+ 1.1- 060923 585 (2.6- 0.7-) 061015 349 1.1+ 1.3+ 061215 215 1.4+ 0.6+ 060924 585 1.2- 0.9- 061015 349 0.8+ 1.9+ 061216 G96 0.5+ 1.1+ 060924 585 0.8+ 1.6- 061016 215 0.7+ 0.1- 061216 G96 0.7+ 1.1+ 060924 585 (0.3+ 2.0-) 061016 215 0.3+ 0.1- 061216 704 0.6+ 1.4+ 060924 585 (0.2+ 2.0-) 061018 423 0.6- 0.1- 061216 G96 0.8+ 1.2+ 060924 585 1.1+ 1.1+ 061018 423 0.4- 0.5- 061216 704 (2.1+ 0.9+) 060924 699 (6.2- 2.0-) 061021 G96 1.0+ 0.1+ 061216 704 0.3+ 1.6+ 060924 699 (5.3- 2.0-) 061021 G96 1.2+ 0.1+ 061216 704 1.1+ 1.6+ 060924 699 1.8- 1.2- 061021 G96 0.7+ 0.0 061223 204 0.8+ 0.2+ 060924 703 0.9+ 0.3+ 061021 G96 1.1+ 0.1+ 061223 204 1.4+ 0.1- 060924 703 0.6+ 0.1+ 061021 703 1.3- 1.3- 061225 130 1.7+ 0.7- 060924 703 0.4+ 0.6+ 061021 703 0.7- 0.3- 2021/ 060924 703 0.0 0.3+ 061021 703 1.0- 0.9- 210605 Y00 0.5- 0.0 060926 850 1.1- 0.5+ 061021 703 0.8- 1.1- 210605 Y00 0.3+ 0.2+ 060926 850 0.3+ 0.1- 061022 423 1.6- 0.5- 210605 Y00 0.0 0.0 060926 850 1.1- 0.8- 061022 423 0.3- 0.2+ 210606 Y00 0.1+ 0.2- 060926 850 1.1- 0.5- 061022 423 0.1+ 0.6- 210606 Y00 0.6+ 0.3- 060926 850 1.0- 0.1+ 061022 415 0.9+ 0.4+ 210606 Y00 0.7+ 0.5- 060926 372 0.4- 1.0- 061022 415 0.3+ 0.2+ 210606 Y00 0.3+ 0.8- 060926 372 0.2- 0.2- 061023 423 0.3- 0.4- 210606 Y00 0.2+ 0.6- ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2021 June 7