Nakano Note (Nakano wa Kangaeru noda) NK 2398 P/2010 U1 (Boattini)
The following improved orbital elements, by S. Nakano, are from 110 observations 2009 Sept. 17 to 2011 Dec. 28. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.53 arc second. See the previous orbits in NK 2039, NK 2132 and NK 2246 (= HICQ 2012). Epoch = 2010 Mar. 25.0 TT T = 2010 Mar. 27.91660 +/- 0.00867 (m.e.) TT Peri. = 88.82592 +/- 0.00096 Node = 281.50274 +/- 0.00036 (2000.0) Inc. = 8.24328 +/- 0.00002 q = 4.9028354 +/- 0.0000143 AU e = 0.2634443 +/- 0.0000111 a = 6.6564354 +/- 0.0000153 AU n' = 0.05739070 +/- 0.00000020 P = 17.174 +/- 0.0000595 years The predicted orbit for the 2026 return is as follows: T = 2026 Sept. 9.84294 TT Epoch = 2026 Aug. 28.0 TT Peri. = 86.68872 e = 0.2476356 Node = 280.65179 (2000.0) a = 6.4800112 AU Inc. = 8.22686 n'= 0.05975035 q = 4.8753301 AU P = 16.495 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2009/ 101018 691 0.5- 0.1+ 101108 H15 0.0 0.1+ 090917 G96 0.1- 0.0 101018 691 0.5- 0.2- 101108 F65 0.3+ 0.7+ 090917 G96 0.2- 0.0 101026 204 0.3+ 0.1+ 101108 F65 0.4+ 0.7+ 090917 G96 0.7+ 0.4+ 101027 204 0.6+ 0.3+ 101109 349 0.2+ 0.2+ 090917 G96 0.5- 0.4- 101028 235 0.0 0.5- 101109 349 0.8+ 0.2- 2010/ 101028 235 0.1- 0.2- 101111 585 0.5+ 0.1- 101001 J75 1.5+ 0.5- 101029 H06 0.2+ 0.3+ 101111 585 0.1+ 0.6+ 101001 J75 0.2+ 1.1- 101029 H06 0.5+ 0.2+ 101111 585 0.6+ 0.8+ 101001 J75 0.5+ 1.1+ 101029 H06 0.7+ 0.2+ 101111 585 0.1+ 0.3- 101017 G96 0.8- 0.6- 101029 157 0.2+ 0.6+ 101111 585 0.3+ 0.4- 101017 G96 0.4+ 0.1+ 101029 157 0.6+ 0.0 101111 585 0.2- 0.1+ 101017 G96 0.3- 0.1- 101029 J01 0.1+ 0.2- 101113 A77 1.4- 0.5+ 101017 G96 0.1- 0.1- 101029 J01 0.2+ 0.0 101113 A77 0.9- 0.5+ 101017 G96 0.3+ 0.1+ 101029 J01 0.4+ 0.2+ 101113 A77 1.0- 0.3- 101017 G96 0.2+ 0.3+ 101031 585 0.5- 1.2+ 101115 F65 0.4+ 0.6+ 101017 G96 0.3- 0.2- 101031 585 0.0 1.1+ 101115 F65 0.9+ 0.6+ 101017 G96 0.5- 0.3- 101031 585 0.8- 0.7+ 101127 349 (2.4+ 2.2+) 101017 G96 0.7- 0.2- 101031 585 0.7+ 0.7+ 101127 349 (2.7+ 2.4+) 101017 H21 0.2+ 0.1+ 101101 F65 0.2+ 0.3+ 101229 372 0.5- 0.3+ 101017 H21 0.0 0.1- 101101 F65 0.4+ 0.4+ 101229 372 0.1+ 0.1+ 101017 H21 0.5- 0.6- 101102 G96 0.1- 0.3- 101229 372 0.2+ 0.1- 101017 H21 0.4+ 0.4- 101102 G96 0.8- 0.5- 2011/ 101017 854 0.8- 0.1- 101102 G96 0.0 0.3- 110102 204 0.8- 0.4- 101017 854 0.9+ 0.2+ 101102 G96 0.2- 0.6- 110102 204 0.0 0.0 101017 854 0.8+ 0.1+ 101104 J01 0.1- 0.3- 110105 215 0.4+ 0.9- 101017 H36 0.6- 0.5- 101104 J01 0.1- 0.2- 110105 215 0.7+ 0.8- 101017 691 0.3- 0.2+ 101104 J01 0.1+ 0.0 110108 349 0.3+ 0.5- 101017 H36 0.2- 0.4+ 101105 703 0.5+ 1.1+ 110108 349 1.0- 1.4- 101017 691 0.3- 0.1+ 101105 703 0.2+ 0.3- 111003 C32 0.0 0.1+ 101017 H36 0.4- 0.2+ 101105 703 0.7- 1.0- 111003 C32 0.2+ 0.1+ 101017 691 0.0 0.2+ 101105 703 (2.0- 0.5-) 111005 C32 0.0 0.3- 101017 300 0.2- 0.1- 101105 215 1.4+ 0.9+ 111005 C32 0.3+ 0.2+ 101017 300 0.7- 0.3- 101105 215 1.1+ 0.3+ 111005 C32 0.5- 0.5+ 101017 300 0.4- 0.5- 101105 215 1.2+ 0.2- 111005 C32 0.2+ 0.3+ 101017 300 0.9- 0.1- 101106 372 0.0 0.1- 111228 G96 0.9- 0.1- 101018 H21 0.7- 1.2- 101106 372 0.1- 0.6- 111228 G96 0.1- 0.5- 101018 H21 0.9- 0.4- 101108 H15 0.2+ 0.3+ 111228 G96 0.7+ 0.5+ 101018 H21 1.0- 1.3- 101108 H15 0.5+ 0.7+ 111228 G96 0.1+ 0.2- 101018 691 0.5- 0.2+ 101108 H15 0.8- 0.1+ ( ) -------- Rejected Obs.
Associate of Central Bureau for Astronomical Telegrams Syuichi Nakano 2013 Feb. 2