Nakano Note (Nakano wa Kangaeru noda) NK 2532 P/Christensen (2006 R2 = 2013 L1)
The following improved orbital elements, by S. Nakano, are from 134 observations 2006 to 2013. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.71 arc second. Recovery observations show the residuals +320" (R. A.) and -72" (Decl.) from the prediction in NK 2162 (= HICQ 2013). The delta-T correction was -0.61 day. See the previous orbits in NK 1444 and NK 2162. Epoch = 2014 Dec. 9.0 TT T = 2014 Dec. 28.44682 +/- 0.04477 (m.e.) TT Peri. = 189.08517 +/- 0.00413 Node = 139.05818 +/- 0.00022 (2000.0) Inc. = 16.30053 +/- 0.00013 q = 3.0540561 +/- 0.0000316 AU e = 0.2692200 +/- 0.0000039 a = 4.1791729 +/- 0.0000117 AU n' = 0.11536354 +/- 0.00000048 P = 8.543 +/- 0.0000358 years T = 2006 June 15.09871 TT Epoch = 2006 July 4.0 TT Peri. = 188.84602 e = 0.2706723 Node = 139.15580 (2000.0) a = 4.1668512 AU Inc. = 16.31692 n'= 0.11587562 q = 3.0390002 AU P = 8.506 years The predicted orbit for the 2023 return is as follows: T = 2023 July 5.92450 TT Epoch = 2023 June 25.0 TT Peri. = 189.14474 e = 0.2711851 Node = 139.04070 (2000.0) a = 4.1631393 AU Inc. = 16.32003 n'= 0.11603063 q = 3.0341578 AU P = 8.494 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2006/ 060917 213 0.3+ 0.4- 060928 423 1.1+ 0.3+ 060830 699 1.7- 0.8+ 060918 349 0.7- 0.8+ 061001 423 0.2- 0.4+ 060830 699 1.9- 0.5- 060918 349 1.0- 0.5+ 061001 423 0.6+ 0.4- 060830 699 0.9- 0.5- 060918 349 0.9- 0.9+ 061007 585 0.7- 0.1+ 060830 699 1.5- 1.2+ 060919 213 0.1- 0.7+ 061007 204 (2.2- 1.7+) 060914 703 0.2+ 0.4- 060919 213 0.0 0.6+ 061010 423 1.3+ 0.0 060914 703 0.1+ 1.8- 060919 213 0.0 0.7+ 061010 423 (1.6+ 2.7+) 060914 703 0.9- 1.3- 060920 673 0.0 0.4- 061010 415 1.5+ 0.0 060914 703 1.1+ 1.4- 060920 673 0.5+ 0.4- 061010 415 0.4+ 0.1+ 060914 703 0.2- 1.5- 060920 673 1.0+ 0.1- 061011 673 1.2+ 1.0- 060914 703 0.1+ 0.5- 060920 703 0.4+ 0.2- 061011 673 0.7+ 0.8- 060914 703 0.5- 0.8- 060920 703 0.8+ 0.3+ 061011 673 0.7+ 0.8- 060914 703 0.5- 0.8- 060920 703 0.5- 0.8- 061011 673 0.3+ 1.1- 060914 E12 0.2+ 0.4- 060920 703 0.2- 0.5+ 061011 423 0.6+ 1.7+ 060915 844 0.6- 1.1- 060921 215 0.3- 1.1- 061011 423 0.1- 0.5+ 060915 844 1.2- 0.0 060921 585 1.5+ 0.5+ 061012 423 0.2- 1.5+ 060915 844 0.8- 0.4- 060921 585 1.2+ 0.8- 061012 423 1.2+ 1.2+ 060915 844 0.4- 1.1- 060921 585 (3.1- 0.2+) 061013 423 1.1+ 1.1+ 060915 I77 (2.3- 0.6-) 060921 585 0.8- 1.9- 061013 423 0.6+ 0.4+ 060915 850 0.1- 0.8+ 060921 585 (2.6- 0.4+) 061018 423 (0.5+ 2.1+) 060915 I77 0.3- 0.3+ 060921 246 1.0+ 0.1+ 061027 703 0.0 1.4+ 060915 844 1.3- 0.0 060921 246 0.0 0.8+ 061027 703 0.4+ 1.5+ 060915 I77 0.1+ 0.6+ 060921 246 0.0 0.8+ 061027 703 0.3- 1.2+ 060915 850 0.5+ 0.2- 060921 246 0.0 1.2+ 061029 415 0.4+ 0.2+ 060915 850 1.2- 0.7+ 060921 246 0.2+ 0.1- 061029 415 0.3+ 0.1- 060915 854 0.5- 0.1- 060921 246 0.4+ 0.1- 061110 673 0.5+ 0.1- 060915 854 0.5+ 1.0+ 060923 349 0.4+ 0.5+ 061110 673 0.8+ 0.0 060915 703 0.1- 0.1+ 060923 349 0.4+ 0.3+ 061110 673 0.6+ 0.4+ 060915 703 0.4+ 0.4- 060923 349 0.7+ 0.6+ 061110 673 1.2+ 0.6+ 060915 703 0.1- 1.1- 060923 585 (2.9+ 1.0+) 061111 G96 0.7+ 0.8- 060915 854 0.9- 0.2+ 060923 585 0.6- 1.1- 061111 G96 0.9+ 0.6- 060915 703 0.3- 1.2- 060923 585 0.3- 0.4+ 061111 G96 0.5+ 0.6- 060915 423 0.7- 0.1- 060923 585 (0.7+ 2.0-) 061111 G96 0.3- 0.1- 060915 423 0.2+ 1.1+ 060923 585 0.3- 0.4- 061112 130 (2.8+ 0.2-) 060915 E12 0.2- 0.3+ 060924 608 0.0 0.4- 061115 215 (2.3+ 1.9+) 060915 E12 0.9- 0.3- 060924 608 0.3+ 0.4- 061216 G96 (2.1- 0.7-) 060915 E12 0.6- 0.1+ 060924 608 0.6+ 0.7+ 061216 G96 0.7+ 0.1- 060915 E12 1.4- 0.3- 060924 423 0.1+ 0.0 2007/ 060915 E12 0.1+ 0.3+ 060924 423 0.6+ 0.3+ 070108 G96 0.1- 0.8- 060915 E12 1.0- 0.1+ 060925 415 0.5+ 0.3+ 070108 G96 1.0- 0.4- 060915 E12 0.8- 0.6- 060925 415 0.6+ 0.0 070108 G96 0.8- 0.4+ 060915 E12 0.4+ 0.2+ 060926 703 0.3- 0.7+ 2013/ 060915 E12 0.6- 0.4+ 060926 703 0.6- 1.7+ 130601 291 0.2+ 0.8+ 060915 E12 0.4- 0.8- 060926 703 0.1+ 0.7+ 130601 291 0.1- 0.1+ 060916 415 0.1+ 1.0- 060926 703 0.8- 1.8+ 130601 291 0.6- 0.2+ 060916 415 0.8- 0.5- 060927 423 0.4+ 0.6+ 130604 291 0.1+ 0.4- 060917 415 0.1+ 0.1+ 060927 423 0.3+ 0.1+ 130604 291 0.2+ 0.4- 060917 415 0.0 0.8- 060927 204 0.3+ 0.2+ 130604 291 0.5+ 0.1- 060917 213 0.3- 0.7- 060928 204 0.5+ 0.1+ 060917 213 0.2+ 0.5- 060928 423 0.5+ 0.4- ( ) -------- Rejected Obs.
Associate of Central Bureau for Astronomical Telegrams Syuichi Nakano 2013 June 16