Nakano Note (Nakano wa Kangaeru noda) NK 2348 262P/McNaught-Russell

The following improved orbital elements, by S. Nakano, are from 301 observations 1994 to 2012. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.66 arc second. The recent observations show the residual of about 3" off mainly in declination from an orbit in NK 2276. See the previous orbits in NK 1147 (= HICQ 2012) and NK 2276. Epoch = 2012 Dec. 19.0 TT T = 2012 Dec. 4.47692 +/- 0.00027 (m.e.) TT Peri. = 171.19248 +/- 0.00004 Node = 218.01182 +/- 0.00008 (2000.0) Inc. = 29.07901 +/- 0.00004 q = 1.2799060 +/- 0.0000018 AU e = 0.8153784 +/- 0.0000002 a = 6.9325897 +/- 0.0000019 AU n' = 0.05399591 +/- 0.00000002 P = 18.253 +/- 0.0000077 years T = 1994 Sept. 7.94710 TT Epoch = 1994 Sept. 5.0 TT Peri. = 171.14683 e = 0.8157158 Node = 218.00952 (2000.0) a = 6.9287380 AU Inc. = 29.07421 n'= 0.05404094 q = 1.2768569 AU P = 18.238 years The predicted orbit for the 2030 return is as follows: T = 2030 Dec. 15.88144 TT Epoch = 2030 Dec. 5.0 TT Peri. = 171.07673 e = 0.8156591 Node = 217.82706 (2000.0) a = 6.8861182 AU Inc. = 29.18966 n'= 0.05454342 q = 1.2693931 AU P = 18.070 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 1994/ 950124 897 1.2+ 1.5+ 120907 C23 0.6- 1.1- 941013 607 (1.4+ 8.2+) 950124 897 (2.7+ 3.5+) 120907 C23 1.4+ 0.3- 941013 607 (4.3+ 0.3+) 950124 897 (2.4+ 4.2+) 120907 B96 0.9+ 1.4+ 941212 413 (1.7- 2.6-) 950124 897 (2.8+ 3.0+) 120907 B96 0.9+ 0.9+ 941212 413 1.7+ 0.5+ 950125 372 0.5+ 0.8+ 120907 B96 1.8- 0.6+ 941214 422 0.6+ 0.2+ 950126 360 0.9+ 0.3+ 120907 B96 0.2- 0.9+ 941214 422 (2.6+ 0.8+) 950126 360 0.0 1.1+ 120907 B96 0.4+ 0.5+ 941214 897 1.4- 1.3+ 950129 691 0.3- 0.7- 120907 B96 1.5- 0.9+ 941214 897 1.8- 0.8- 950129 691 0.2- 0.3- 120908 160 0.1- 0.3+ 941214 897 1.6- 1.6+ 950131 372 (3.7- 7.7+) 120908 160 0.1- 0.9+ 941214 897 0.3- 1.2+ 950201 413 0.2+ 0.1- 120908 160 0.7- 1.1+ 941214 887 0.8+ 1.2- 950201 413 0.2+ 0.3- 120908 J24 0.0 0.2+ 941214 887 0.8+ 0.6+ 950201 104 0.3+ 0.5- 120908 J24 0.2+ 0.7- 941215 557 0.4+ 0.1+ 950201 104 0.4+ 0.7+ 120908 J24 0.1+ 0.3- 941215 557 0.5+ 0.3+ 950201 104 0.7+ 0.2- 120909 H47 0.2+ 0.0 941215 557 0.3+ 0.9+ 950202 413 0.2+ 0.4- 120909 H47 0.2- 0.2- 941215 557 1.0+ 1.3+ 950202 413 0.2+ 1.0- 120909 H47 0.3- 1.4- 941215 897 1.7+ 0.3- 950209 413 0.5+ 0.3- 120909 A71 0.4- 0.9- 941215 897 0.4- 0.2- 950209 413 0.5+ 0.5- 120909 A71 1.1- 0.6+ 941215 897 1.8+ 1.7+ 950220 413 0.6- 0.5- 120909 A71 0.4- 1.1+ 941215 540 0.1+ 1.6+ 950220 413 0.8- 0.6- 120909 A71 0.4+ 0.9- 941215 540 0.0 1.0+ 950221 413 0.7- 1.0- 120909 A71 0.5- 0.4- 941215 540 0.5+ 1.3+ 950224 360 (2.1- 0.0 ) 120909 A71 0.1- 0.1- 941216 864 0.3- 0.4- 950224 360 0.6- 0.6+ 120909 B82 0.0 0.1- 941216 864 0.2- 0.1- 950224 360 0.2- 0.0 120909 B82 0.1+ 0.1- 941216 864 0.1- 0.4- 950307 413 0.4+ 0.5+ 120909 B82 0.2+ 0.2+ 941218 413 0.6- 1.1- 950307 413 0.7+ 0.6+ 120912 H06 0.0 0.2+ 941218 413 0.3- 0.5- 950321 413 0.2+ 1.2- 120912 H06 0.0 0.3+ 941218 413 0.5- 0.7- 950321 413 0.3+ 0.3- 120912 H06 0.0 0.4+ 941218 413 0.6- 0.3- 950322 413 0.4+ 0.5- 120912 585 0.4- 0.8- 941218 413 0.5- 0.2- 950417 413 0.3- 0.2- 120912 585 0.7+ 0.5- 941218 897 (1.1- 2.2+) 2012/ 120912 585 0.8+ 0.2- 941218 897 0.2+ 0.8- 120529 F65 0.1+ 0.3- 120912 585 0.5+ 0.3- 941218 897 (2.7- 0.4-) 120529 F65 0.3+ 0.9- 120912 585 0.4+ 0.3+ 941218 897 0.4- 1.1+ 120529 F65 0.3+ 0.3+ 120912 585 0.4- 0.0 941218 897 (1.8- 2.4+) 120530 H06 1.0+ 0.3- 120912 585 0.2- 0.1- 941218 897 1.3+ 0.6+ 120530 H06 1.0+ 0.2- 120912 585 0.5- 0.1+ 941218 413 0.9- 0.6- 120530 H06 1.2+ 0.5- 120912 585 0.7- 0.8+ 941218 413 0.6- 0.5- 120724 C10 0.3- 1.2- 120912 585 0.2+ 0.2+ 941219 413 0.1- 0.5- 120724 C32 1.2- 1.2- 120912 585 0.8- 1.0- 941219 413 0.6- 0.5- 120724 C10 (0.5- 2.2-) 120912 585 0.1+ 0.5- 941219 413 0.6- 0.6- 120724 C32 1.4- 1.1- 120913 J24 (0.8+ 2.2-) 941219 413 0.4- 0.5- 120724 C32 1.4- 0.9- 120913 J24 0.1- 0.2+ 941219 413 0.6- 0.6- 120806 204 0.2- 0.3+ 120915 958 (2.4- 0.9-) 941219 413 0.4- 0.1- 120806 204 0.4+ 0.1+ 120915 958 0.5+ 1.7- 941219 413 0.7- 0.5+ 120810 H06 0.4+ 0.9+ 120915 958 1.8- 0.3- 941220 413 0.9- 0.3- 120810 H06 0.3+ 1.0+ 120915 B96 1.2+ 0.8- 941220 413 0.5- 0.5- 120810 H06 0.8+ 1.0+ 120915 B96 (2.6+ 0.5-) 941220 413 0.7- 0.4- 120810 B96 0.6- 1.8+ 120915 B96 0.3- 0.3- 941220 413 0.6- 0.6- 120810 B96 0.3+ 0.9+ 120915 I72 (0.1+ 4.1-) 941220 413 0.6- 0.4- 120810 B96 0.8+ 1.1+ 120915 I72 (0.1+ 2.3-) 941221 413 0.5- 0.0 120811 215 0.0 0.8- 120915 I72 0.2- 0.8- 941221 413 0.4- 0.1- 120811 215 0.1+ 0.5- 120915 I72 0.7- 0.1+ 941221 413 0.2- 0.6+ 120811 215 0.5+ 0.4- 120915 I72 0.9- 1.6+ 941221 413 0.0 0.6+ 120812 C79 (1.5- 3.5-) 120916 160 0.2+ 0.2- 941222 413 0.3- 0.1+ 120812 C79 (0.2- 3.5-) 120916 160 0.0 0.0 941222 413 0.3- 0.0 120812 C79 (1.1+ 3.6-) 120916 160 0.0 0.0 941222 896 0.8- 0.7- 120812 C79 (2.1+ 3.4-) 120916 C47 0.5- 0.1+ 941223 360 0.1+ 0.3- 120812 A71 0.4- 0.3+ 120916 C47 0.1- 0.2- 941223 360 0.1- 0.1+ 120812 A71 0.3+ 0.7+ 120916 C47 0.1+ 0.0 941223 360 0.1- 0.4+ 120812 A71 0.3+ 0.1+ 120916 C47 0.6- 0.1+ 941223 864 0.5- 0.3- 120812 A71 0.3- 0.1- 120918 970 0.6- 0.0 941223 864 0.1- 1.0- 120812 A71 0.2+ 0.1- 120918 970 0.7- 0.0 941223 864 0.2+ 0.1+ 120812 A71 0.1+ 0.1- 120918 970 0.4- 0.2+ 941224 897 0.8- 1.7+ 120812 A71 0.0 0.2- 120918 J24 0.4+ 0.5- 941224 897 1.6- 1.0- 120812 A71 0.0 0.4+ 120918 J24 0.0 0.5- 941224 897 1.2+ 0.8+ 120814 511 0.2- 0.3- 120918 J24 0.1- 0.7- 941224 897 0.5+ 0.8+ 120814 511 0.1- 0.0 120919 C10 0.5+ 0.2+ 941226 292 (2.6+ 2.4+) 120815 C01 0.1+ 0.1+ 120919 C10 0.2- 0.1+ 941226 292 (0.9+ 3.3+) 120815 C01 0.7- 0.3- 120919 C10 1.4- 0.0 941227 360 0.2- 0.2- 120815 C01 0.5- 0.3- 120919 B50 1.0+ 0.0 941227 360 0.4+ 1.0+ 120815 B54 0.5+ 0.2- 120919 B50 (1.2- 2.7+) 941227 360 0.0 0.5- 120815 B54 0.2+ 0.3- 120920 958 (2.0+ 0.9+) 941228 897 1.6- 0.5- 120816 511 0.0 0.1+ 120920 958 (0.4+ 2.1+) 941228 474 0.2+ 0.3- 120816 511 0.8+ 0.4- 120920 958 1.2+ 0.5- 941228 897 0.2- 1.3+ 120817 B96 1.0+ 0.2+ 120925 900 1.4- 0.0 941228 474 1.1- 0.3+ 120817 B96 (2.3+ 0.7-) 120925 900 0.7+ 0.2- 941229 897 0.5- 0.9- 120817 B96 0.3+ 0.1- 120928 C23 (2.2- 4.3+) 941229 372 0.2+ 1.1- 120817 B96 0.2+ 0.0 120928 C23 (4.0- 3.9+) 941229 897 0.2- 0.3+ 120817 B96 0.8+ 0.4+ 120930 J01 0.2- 0.2- 941229 887 0.5- 1.2+ 120817 B96 0.7- 0.1+ 120930 J01 0.1+ 0.4- 941229 887 0.2+ 1.0+ 120818 B96 1.0+ 1.2+ 120930 C10 0.3+ 0.9+ 941229 887 0.5+ 0.0 120818 B96 0.6+ 0.0 120930 C10 0.9+ 0.3- 941231 693 (2.1- 0.1-) 120818 B96 0.2- 0.4+ 121005 511 0.1- 0.3+ 941231 693 1.7- 0.1- 120818 B96 0.2+ 0.3+ 121005 511 0.4+ 0.3+ 941231 693 0.9+ 0.1- 120818 B96 1.4- 0.7+ 121005 J24 0.1+ 0.3- 941231 693 0.6- 0.2+ 120818 C23 0.5- 1.0+ 121005 J24 0.7+ 0.8- 1995/ 120818 C23 0.8- 0.2+ 121005 J24 0.5+ 0.2- 950101 864 0.0 0.5- 120818 C23 0.3- 0.1+ 121005 B54 1.5+ 0.4+ 950101 864 0.5- 0.0 120819 130 0.5+ 0.4- 121005 B54 1.3+ 0.4- 950102 372 0.2+ 0.2+ 120819 130 0.8+ 0.3- 121005 B54 0.8+ 0.0 950102 887 0.3+ 1.7+ 120819 130 0.0 0.4- 121006 987 1.2- 0.6+ 950102 372 1.5+ 1.7- 120819 130 0.7+ 0.2- 121006 J24 0.8- 0.2- 950102 887 1.5+ 0.6+ 120819 160 0.0 0.1+ 121006 J24 0.6+ 0.4- 950104 474 0.4+ 0.9- 120819 160 0.0 0.1+ 121006 J24 0.9+ 0.0 950104 474 0.7- 0.6- 120819 160 0.3- 0.3+ 121006 987 0.1- 0.1- 950104 372 0.8+ 0.4- 120819 C47 0.4- 1.4+ 121006 J36 0.2+ 1.0- 950105 897 (2.0+ 1.0-) 120819 C47 0.0 0.4+ 121006 987 1.3- 1.0+ 950105 897 1.1+ 0.3- 120819 C47 0.4- 0.4+ 121006 J36 0.6- 1.0- 950105 897 0.8+ 1.6+ 120819 C47 0.2- 0.2- 121006 J36 0.8- 0.6- 950106 372 0.1+ 0.2- 120819 C47 0.0 0.2- 121007 900 0.4- 0.2- 950106 372 1.6+ 0.2- 120820 J01 0.2- 0.2- 121007 900 0.4- 0.1+ 950108 372 (3.7+ 1.5-) 120820 J01 0.6- 0.4- 121008 213 0.0 0.2+ 950108 372 (4.7+ 1.4-) 120821 B42 0.8+ 0.2+ 121008 213 0.1+ 0.0 950112 413 0.1+ 0.5- 120821 B42 0.0 1.4+ 121010 B96 0.5- 0.7- 950112 413 0.0 0.7- 120821 B42 0.2+ 0.4+ 121010 B96 (2.1- 0.3+) 950112 413 0.1+ 0.5- 120822 585 0.0 0.3+ 121010 B96 0.0 0.0 950113 413 0.8+ 0.6+ 120822 585 0.5- 0.2+ 121010 B96 0.0 0.2- 950113 413 0.7+ 0.2- 120822 585 0.3+ 0.9- 121010 B96 0.3+ 0.1- 950113 413 0.1+ 0.1+ 120822 585 0.7+ 0.6+ 121010 C23 (5.0- 5.2+) 950114 413 0.1+ 0.3- 120822 585 0.2- 0.1+ 121010 B96 0.7+ 0.2- 950114 413 0.4+ 0.7- 120822 585 0.3+ 0.2- 121010 B96 0.6+ 0.0 950115 413 0.0 0.8- 120822 585 0.3+ 0.4- 121010 C23 (3.6- 4.8+) 950115 413 0.4+ 0.6- 120907 C23 0.4- 0.8- 121010 C23 (5.1- 4.1+) ( ) -------- Rejected Obs.

Associate of Central Bureau for Astronomical Telegrams Syuichi Nakano 2012 Oct. 14

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