Nakano Note (Nakano wa Kangaeru noda) NK 3893 P/Siding Spring (2006 R1 = 2019 S1)
The following improved orbital elements, by S. Nakano, are from 65 observations 2006 to 2019. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.41 arc second. Residuals on the recovery observations were +2.99 deg for Right Ascension and +3.14 deg for Declination from the prediction in NK 1451 (= HICQ 2019) with the delta-T correction = +6.04 days. This is same orbit in CBET 4671. Epoch = 2019 Dec. 23.0 TT T = 2019 Dec. 29.28468 +/- 0.00198 (m.e.) TT Peri. = 249.29770 +/- 0.00092 Node = 218.83801 +/- 0.00023 (2000.0) Inc. = 160.06863 +/- 0.00002 q = 1.6633365 +/- 0.0000017 AU e = 0.7044330 +/- 0.0000003 a = 5.6276122 +/- 0.0000079 AU n' = 0.07382744 +/- 0.00000016 P = 13.350 +/- 0.0000282 years T = 2006 Sept. 3.67400 TT Epoch = 2006 Sept.22.0 TT Peri. = 249.30983 e = 0.7025649 Node = 218.63316 (2000.0) a = 5.6183851 AU Inc. = 160.01117 n'= 0.07400939 q = 1.6711049 AU P = 13.317 years The predicted orbit for the 2033 return is as follows: T = 2033 May 3.18574 TT Epoch = 2033 May 3.0 TT Peri. = 249.12146 e = 0.7051540 Node = 218.87964 (2000.0) a = 5.6325917 AU Inc. = 160.06357 n'= 0.07372956 q = 1.6607470 AU P = 13.368 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2006/ 060912 F84 0.4- 0.6- 060920 E12 0.0 0.0 060901 E12 0.7- 1.3+ 060912 F84 0.2+ 0.1+ 060920 E12 0.3+ 0.1- 060901 E12 0.3- 0.0 060912 F84 0.1+ 0.5+ 060921 E12 0.1+ 0.0 060901 E12 0.5- 1.2- 060912 E12 0.2+ 0.0 060922 E12 0.0 0.3+ 060901 E12 0.8- 0.3+ 060912 E12 0.1- 0.0 060923 E12 0.2+ 0.1- 060901 E12 0.0 0.2- 060912 E12 0.2+ 0.2- 060926 E12 0.1- 0.7- 060901 E12 0.4- 0.4- 060913 E12 0.1- 0.1- 060926 E12 0.2+ 0.6- 060901 E12 0.5+ 0.1+ 060913 423 0.7- 0.3+ 2019/ 060901 E12 0.1- 0.1- 060913 423 0.9+ 0.1+ 190925 F51 0.1- 0.1- 060901 E12 0.9+ 0.1- 060913 E12 0.2- 0.1- 190925 F51 0.1+ 0.1- 060901 E12 0.8+ 0.9+ 060913 E12 0.2- 0.1- 190925 F51 0.1+ 0.0 060901 E12 0.0 0.9+ 060914 E12 0.2+ 0.0 190925 F51 0.1+ 0.0 060901 E12 0.2+ 1.2+ 060914 E12 0.4- 0.0 190926 J04 0.3- 0.1+ 060901 E12 0.2- 0.2- 060914 E12 0.3- 0.0 190926 J04 0.1- 0.0 060902 E12 0.0 0.1+ 060914 415 0.3- 0.4- 190926 J04 0.0 0.2+ 060902 E12 0.3- 0.0 060914 415 0.6+ 0.5+ 190926 L01 0.1+ 0.4- 060902 E12 0.3+ 0.2+ 060914 415 0.8- 1.2+ 190926 L01 0.1- 0.1+ 060902 E12 0.2+ 0.1+ 060915 E12 0.1+ 0.4- 190926 L01 0.4- 0.3+ 060902 E12 0.1+ 0.1+ 060915 423 0.5+ 0.4+ 190926 F51 0.1+ 0.1- 060908 F84 0.5+ 0.0 060917 E12 0.1- 0.1- 190926 F51 0.1+ 0.1- 060908 F84 0.2- 0.2+ 060917 E12 0.1- 0.0 190926 F51 0.1+ 0.0 060910 F84 0.9- 1.7- 060918 E12 0.0 0.1- 060910 F84 0.8- 1.0- 060919 E12 0.0 0.7- ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2019 Sept. 28