Nakano Note (Nakano wa Kangaeru noda) NK 5040 P/Siding Spring (2004 V3 = 2023 Ox)
The following improved orbital elements, by S. Nakano, are from 64 observations 2004 to 2023. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.42 arc second. Residuals for the recovery observations by M. Masek (I47) were +0.13 deg. for Right Ascension and +0.55 deg for Declination from the prediction in NK 1246R (= HICQ 2020) with the delta-T correction = -3.20 days The comet has passed 0.27 AU from Saturn on 1980 March and 1.03 AU from Jupiter on 1986 September. Also comet will pass 3.30 AU from Saturn on 2038 Jan. 31 UT. See the previous orbits in YC 2445 and NK 1246R. Epoch = 2023 Dec. 2.0 TT T = 2023 Nov. 21.08136 +/- 0.00394 (m.e.) TT Peri. = 322.55838 +/- 0.00055 Node = 356.12421 +/- 0.00004 (2000.0) Inc. = 50.44573 +/- 0.00004 q = 3.9498967 +/- 0.0000048 AU e = 0.4455116 +/- 0.0000006 a = 7.1234971 +/- 0.0000119 AU n' = 0.05183990 +/- 0.00000013 P = 19.013 +/- 0.0000476 years T = 2004 Nov. 11.36401 TT Epoch = 2004 Nov. 11.0 TT Peri. = 322.36867 e = 0.4460989 Node = 356.09291 (2000.0) a = 7.1099597 AU Inc. = 50.45312 n'= 0.05198803 q = 3.9382144 AU P = 18.958 years The predicted orbit for the 2042 return is as follows: T = 2042 Oct. 9.52700 TT Epoch = 2042 Oct. 3.0 TT Peri. = 322.42074 e = 0.4466695 Node = 356.02972 (2000.0) a = 7.1022232 AU Inc. = 50.48291 n'= 0.05207300 q = 3.9298769 AU P = 18.927 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2004/ 041106 413 0.0 0.0 041218 415 0.7+ 1.8+ 041103 E12 0.4- 0.1+ 041106 413 0.3+ 0.1- 041218 415 (0.7+ 2.7-) 041103 E12 0.7- 0.2+ 041106 413 0.3+ 0.0 2005/ 041103 E12 0.3- 0.7+ 041107 413 0.3- 0.4- 050703 413 0.4+ 1.3+ 041103 E12 0.3- 0.5+ 041107 413 0.0 0.2- 050704 413 1.6- 1.2- 041103 E12 0.0 0.8- 041108 413 0.1+ 0.0 050909 442 (3.3- 38.6-) 041103 E12 0.6- 0.2+ 041108 413 0.0 0.2- 051001 G96 0.1+ 0.1- 041103 E12 0.4- 0.6+ 041112 413 0.1- 0.2+ 051001 G96 0.3+ 0.3- 041103 E12 0.4+ 0.3+ 041112 413 0.0 0.1+ 051001 G96 0.6+ 0.5- 041103 413 0.0 0.2- 041112 413 0.0 0.0 051001 G96 0.6- 0.8- 041103 413 0.0 0.0 041112 415 0.4- 0.4+ 051004 561 (7.9- 26.8-) 041103 413 0.3+ 0.1- 041112 415 0.2- 0.1- 051004 561 (3.3- 27.2-) 041103 413 0.0 0.0 041112 415 0.2+ 0.2- 051004 561 (2.2- 28.3-) 041103 413 0.4+ 0.1- 041115 415 0.3- 0.4+ 051007 G96 0.0 1.8+ 041103 413 0.2+ 0.2- 041115 415 0.3+ 0.1- 051008 A33 (7.0- 39.1-) 041103 413 0.5- 0.1+ 041115 415 0.2- 0.2- 051024 413 (4.2+ 1.0+) 041103 413 0.3- 0.0 041117 I05 0.2- 0.2+ 051024 413 (3.8+ 1.2+) 041103 413 0.0 0.0 041117 I05 0.0 0.1+ 2023/ 041105 413 0.1- 0.3- 041117 I05 0.0 0.8+ 230718 I47 0.7+ 0.3+ 041105 413 0.2+ 0.2- 041117 415 0.4+ 0.3+ 230718 I47 0.1- 0.2- 041106 474 0.6- 0.1+ 041117 413 0.0 0.2+ 230719 I47 0.5- 0.3+ 041106 474 0.2+ 0.2- 041117 415 0.4+ 0.5+ 230719 I47 0.3- 0.0 041106 413 0.1+ 0.2- 041117 413 0.0 0.2+ 230719 I47 0.5- 0.1- 041106 474 0.2- 0.0 041124 413 0.0 0.1+ 230719 I47 0.4- 0.3+ 041106 413 0.1- 0.0 041124 413 0.2+ 0.3+ 230719 I47 0.2- 0.3- ( ) -------- Rejected Obs.
Associate of the CBAT Late edition Syuichi Nakano 2023 July 20