Nakano Note (Nakano wa Kangaeru noda) NK 2209 P/SOHO (2003 T12 = 2012 A3)
The following improved orbital elements, by S. Nakano, are from 136 observations 2003 to 2012. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The weighting mean residual is +/- 1.48 arc seconds. Identification suggested by R. Kracht (CBET 3001). The comet has passed 1.02 AU from Jupiter 2005 Dec. 1 and 0.17 AU from Earth on 2008 Jan. 27 UT. The past perihelion passeges were T= 2003 Oct. 16 and 2007 Dec. 13 TT. Epoch = 2012 Feb. 3.0 TT T = 2012 Jan. 26.45174 +/- 0.00041 (m.e.) TT Peri. = 217.67167 +/- 0.00155 Node = 176.47313 +/- 0.00131 (2000.0) Inc. = 11.47520 +/- 0.00030 q = 0.5748009 +/- 0.0000076 AU e = 0.7762235 +/- 0.0000029 a = 2.5686382 +/- 0.0000186 AU n' = 0.23941407 +/- 0.00000260 P = 4.117 +/- 0.0000447 years T = 2003 Oct. 16.29387 TT Epoch = 2003 Oct. 8.0 TT Peri. = 214.68197 e = 0.7715468 Node = 179.17667 (2000.0) a = 2.5772750 AU Inc. = 12.08012 n'= 0.23821161 q = 0.5887866 AU P = 4.138 years [ T = 2007 Dec. 13.86370 TT Epoch = 2007 Dec. 6.0 TT Peri. = 217.66829 e = 0.7753146 Node = 176.46596 (2000.0) a = 2.5703378 AU Inc. = 11.46423 n'= 0.23917665 q = 0.5775174 AU P = 4.121 years ] The predicted orbit for the 2016 return is as follows: T = 2016 Mar. 9.49232 TT Epoch = 2016 Feb. 22.0 TT Peri. = 217.74168 e = 0.7754329 Node = 176.40565 (2000.0) a = 2.5700713 AU Inc. = 11.45763 n'= 0.23921384 q = 0.5771534 AU P = 4.120 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2003/ 120113 C50 4.3- 20.9- Y 120117 C50 (8.8+ 46.7+)Y 031009 249(59.7+ 60.2-)Y 120113 C50 1.7+ 15.1- Y 120117 C50(62.4+ 32.4+)Y 031009 249 15.6+ 23.1- Y 120113 C50 10.4+ 11.5- Y 120117 C50(65.8+ 19.0+)Y 031009 249 8.1- 24.5- Y 120113 C50 12.7+ 15.8- Y 120117 C50(41.4+ 55.5+)Y 031009 249(36.2+ 4.2-)Y 120113 C50 4.4+ 20.1- Y 120117 C50 4.3+ 8.0- Y 031009 249(34.0- 12.9+)Y 120113 C50 8.6- 2.5- Y 120117 C50 (9.6+ 34.5+)Y 031009 249 4.9+ 5.1+ Y 120113 C50 3.5+ 12.9- Y 120118 C50(24.6- 54.9+)Y 031009 249(14.7- 39.3-)Y 120114 C50 2.8- 12.9- Y 120118 C50(38.7- 9.2+)Y 031009 249(25.7+ 35.4-)Y 120114 C50 7.9- 1.4- Y 120118 C50(53.8- 11.5+)Y 031009 249(11.0+ 39.3-)Y 120114 C50 5.7- 11.0- Y 120118 C50(32.1- 35.8+)Y 031009 249(53.0- 88.3-)Y 120114 C50 8.2- 1.7- Y 120118 C50 3.6+ 25.0+ Y 031009 249 3.2- 8.7+ Y 120114 C50 9.7- 15.4- Y 120118 C50 24.4- 22.2+ Y 031009 249 (8.6- 32.3-)Y 120114 C50 9.8+ 14.1- Y 120118 C50(21.8- 53.3+)Y 031009 249(10.3+ 34.4-)Y 120114 C50 4.0- 3.1+ Y 120118 C50(44.5+ 77.4+)Y 031009 249 7.0- 21.6- Y 120114 C50 13.8- 5.7- Y 120118 C50 16.8+ 15.5+ Y 031009 249 16.1- 2.3+ Y 120114 C50 11.7- 1.6- Y 120118 C50 (3.5+ 61.5+)Y 031009 249 11.7- 14.0- Y 120114 C50 5.0+ 5.5- Y 120118 C50 (1.9- 56.5+)Y 031009 249 8.8- 2.4+ Y 120114 C50 11.4- 4.6+ Y 120118 C50(55.0+ 44.4+)Y 031009 249 2.5+ 28.9- Y 120114 C50 1.1- 10.6+ Y 120118 C50(28.4+ 85.3+)Y 031009 249 13.3+ 20.4- Y 120114 C50 9.2- 19.6+ Y 120118 C50(23.5+ 69.1+)Y 031009 249 (0.4+ 30.8-)Y 120114 C50 8.5- 2.5+ Y 120118 C50(36.1- 17.9+)Y 031009 249(10.1- 47.4-)Y 120114 C50 3.5- 5.3+ Y 120118 C50(38.4- 9.7+)Y 031009 249(38.0+ 32.5-)Y 120114 C50 12.5- 19.2+ Y 120118 C50(39.8- 29.4+)Y 031009 249 4.3+ 24.0- Y 120114 C50 9.9+ 9.0+ Y 120118 C50 (4.9- 71.1+)Y 031010 249 9.8+ 7.8- Y 120114 C50 1.9- 9.4+ Y 120118 C50(40.1- 47.5+)Y 031010 249 4.4- 17.4- Y 120114 C50 4.5- 12.1+ Y 120119 C50(0.05- 0.03+)Y 031010 249 8.5+ 27.8- Y 120114 C50 2.8- 22.7+ Y 120119 C50(0.06- 0.03+)Y 031010 249(15.5- 73.0-)Y 120114 C50 13.4+ 6.3+ Y 120119 C50(0.05- 0.03+)Y 031010 249 0.5- 2.3+ Y 120114 C50 1.0+ 12.8+ Y 120119 C50(28.8- 67.1+)Y 031010 249 20.6+ 20.2+ Y 120115 C50 1.7+ 13.3+ Y 120119 C50 (3.7- 41.6+)Y 031010 249 26.1- 18.6- Y 120115 C50 2.5- 15.8+ Y 120119 C50(30.2+ 66.2+)Y 031010 249 2.2- 16.8- Y 120115 C50 2.1+ 12.2+ Y 120119 C50(31.4- 46.0+)Y 031010 249 1.0+ 0.7- Y 120115 C50 0.4+ 9.5+ Y 120119 C50(13.6+ 48.4+)Y 031010 249 (5.6+ 53.0-)Y 120115 C50 1.3+ 12.9+ Y 120119 C50(37.9+ 2.0+)Y 031010 249(21.9+ 78.0-)Y 120115 C50 9.4+ 14.2+ Y 120119 C50(33.8+ 49.3+)Y 031010 249(40.9+ 67.4-)Y 120115 C50 0.7- 16.4+ Y 120119 C50(36.1+ 55.5+)Y 031010 249(75.1- 24.4-)Y 120115 C50 8.1+ 14.6+ Y 120119 C50(39.7+ 66.9+)Y 031010 249 0.7- 24.8- Y 120115 C50 3.3+ 8.8+ Y 120119 C50(52.7+ 41.0+)Y 031010 249(11.0- 35.6-)Y 120115 C50 1.1+ 5.9+ Y 120120 C50(58.4+ 71.2+)Y 031010 249 7.9+ 16.7- Y 120115 C50 8.8+ 16.1+ Y 120120 C50(14.3+ 45.4+)Y 031010 249 15.9+ 26.7- Y 120115 C50 3.8+ 10.0+ Y 120120 C50(14.5+ 62.4+)Y 031010 249(10.6- 31.3-)Y 120115 C50 13.5- 16.0+ Y 120120 C50(58.9+ 60.4+)Y 031010 249(51.3- 89.8-)Y 120115 C50 3.1+ 17.9+ Y 120120 C50(52.7+ 66.5+)Y 031010 249 15.5+ 13.8- Y 120115 C50 6.1+ 7.7+ Y 120120 C50(99.6+ 75.5+)Y 031010 249(16.0- 87.1-)Y 120115 C50 8.7+ 6.5+ Y 120120 C50(70.5+ 64.4+)Y 031010 249(0.00+ 0.03-)Y 120115 C50 0.3+ 19.3+ Y 120120 C50(45.1+ 90.4+)Y 031010 249 (8.6- 84.8-)Y 120115 C50 0.7+ 6.1+ Y 120120 C50(15.6+ 53.3+)Y 031010 249(0.00- 0.04-)Y 120115 C50 9.7+ 15.7+ Y 120120 C50(16.0- 47.1+)Y 031010 249 9.8- 12.9- Y 120115 C50 3.2+ 14.4+ Y 120120 C50(14.5+ 35.0+)Y 031010 249 (4.1- 50.4-)Y 120115 C50 13.5+ 23.6+ Y 120120 C50(0.05- 0.02+)Y 031010 249 27.3- 29.0- Y 120116 C50 4.4+ 11.2+ Y 120120 C50(42.7- 16.0+)Y 031010 249 17.0- 22.6- Y 120116 C50 0.4- 28.7+ Y 120121 C50(50.2- 16.7+)Y 031010 249 (4.2- 38.3-)Y 120116 C50 1.1- 23.2+ Y 120121 C50(67.9- 60.4+)Y 031010 249 3.3- 7.0- Y 120116 C50 5.2+ 22.6+ Y 120121 C50(29.8+ 34.8+)Y 031010 249 22.3- 1.2+ Y 120116 C50 2.2- 25.0+ Y 120121 C50(26.7+ 58.4+)Y 031010 249(35.5+ 33.3-)Y 120116 C50 2.0+ 25.4+ Y 120121 C50(34.5+ 51.2+)Y 031010 249 (0.7+ 55.3-)Y 120116 C50 8.7+ 23.8+ Y 120121 C50(32.5+ 21.8+)Y 031010 249 15.7- 10.2- Y 120116 C50 0.2+ 29.0+ Y 120121 C50(54.8+ 21.5+)Y 031010 249(46.4- 25.2-)Y 120116 C50 4.3- 24.3+ Y 120130 H06 1.0- 1.4+ 031010 249(17.2- 45.2-)Y 120116 C50 5.7+ 25.5+ Y 120130 H06 0.8- 0.9+ 031010 249(12.8- 43.3-)Y 120116 C50 7.0- 24.7+ Y 120130 H06 0.0 0.4- 031010 249(60.7+ 7.5-)Y 120116 C50 6.2- 11.7+ Y 120130 H06 0.3+ 1.2- 031010 249 (6.6+ 51.6-)Y 120116 C50 18.2+ 22.9- Y 120131 H06 0.1- 0.7- 031011 249 1.8+ 17.1+ Y 120116 C50 11.5- 12.7- Y 120131 H06 0.1- 0.8- 031011 249 9.5- 8.6- Y 120116 C50(45.9- 57.4-)Y 120131 H06 0.2+ 0.4- 031011 249 12.5- 29.5- Y 120116 C50 0.5+ 22.2- Y 120201 H06 0.6+ 0.8- 031011 249 2.2+ 17.9+ Y 120116 C50(55.3- 17.1+)Y 120201 H06 0.1- 0.7- 031011 249 1.7- 4.3- Y 120116 C50(43.8- 8.7-)Y 120201 H06 0.3- 0.1- 031011 249(21.5- 31.2+)Y 120116 C50(14.1+ 31.5+)Y 120202 D95 0.9- 0.2+ 031011 249(45.2- 42.6-)Y 120116 C50 6.2- 20.3- Y 120202 D95 (2.2- 3.7-) 031011 249 (4.4- 57.6-)Y 120117 C50 21.5+ 10.0- Y 120203 H06 0.4+ 0.8+ 031011 249(10.2- 53.5-)Y 120117 C50(63.9- 18.7-)Y 120203 H06 0.1+ 1.3+ 2012/ 120117 C50(37.7- 40.5+)Y 120203 D95 0.3+ 1.2+ 120113 C50(0.01+ 0.03-)Y 120117 C50 6.1- 20.7+ Y 120203 D95 (2.3- 0.4-) 120113 C50 27.3+ 4.8- Y 120117 C50 2.0+ 18.8+ Y 120203 215 (2.4+ 0.3+) 120113 C50 8.1+ 14.6- Y 120117 C50 12.9- 6.8+ Y 120203 215 (4.8+ 3.6+) 120113 C50 (6.8- 33.0-)Y 120117 C50 1.4+ 21.8+ Y 120207 H06 0.5+ 0.7+ 120113 C50 2.0+ 14.9- Y 120117 C50(40.7- 20.8+)Y 120207 H06 0.0 0.2- 120113 C50 3.3+ 27.8- Y 120117 C50(36.5+ 7.7+)Y 120207 H06 0.8+ 0.3- 120113 C50 11.9+ 21.8- Y 120117 C50 17.7- 17.5- Y 120207 H06 0.5- 0.7- 120113 C50 5.4- 19.8- Y 120117 C50 18.5- 7.7- Y 120113 C50 3.2- 20.8- Y 120117 C50(20.3- 50.1+)Y ( ) -------- Rejected Obs.
Associate of Central Bureau for Astronomical Telegrams Syuichi Nakano 2012 Feb. 8