Nakano Note (Nakano wa Kangaeru noda) NK 2237 C/2009 T1 (McNaught)
The following improved orbital elements, by S. Nakano, are from 131 observations 2009 Oct. 9 to 2011 Oct. 4. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.68 arc second. The comet has passed 3.97 AU from Jupiter on 2012 Mar. 12 UT. See the previous orbits in NK 1878, NK 1986 and NK 2085 (HICQ 2011/2012). Epoch = 2009 Oct. 16.0 TT T = 2009 Oct. 8.17343 +/- 0.00536 (m.e.) TT Peri. = 282.52145 +/- 0.00048 Node = 54.40056 +/- 0.00006 (2000.0) Inc. = 89.89652 +/- 0.00003 q = 6.2203854 +/- 0.0000185 AU e = 0.9984429 +/- 0.0000172 1/a = +0.0002503 +/- 0.0000028 1/AU origin = +0.000926 (Q= 7) future = +0.000990 The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2009/ 091125 D25 0.3- 0.6+ 100116 C51 0.0 1.0- 091009 E12 0.3- 0.4- 091127 415 1.2- 1.0- 100116 C51 0.2+ 0.3- 091009 E12 0.5+ 0.1- 091127 415 0.5- 0.6+ 100116 C51 0.7+ 1.1- 091009 E12 0.6+ 0.5+ 091206 415 0.4- 0.6+ 100116 C51 0.6- 1.5+ 091009 E12 0.1+ 0.1- 091206 415 0.4- 0.3+ 100119 423 1.3- 0.0 091010 474 0.2+ 0.1+ 091206 415 0.1+ 0.4+ 100119 423 0.5+ 0.4+ 091010 D90 0.2+ 0.7+ 091206 415 0.0 0.8+ 100120 423 0.4- 0.2- 091010 D25 0.3+ 0.1+ 091212 423 0.7- 0.2- 100120 423 0.4+ 0.7+ 091010 474 0.2+ 0.2+ 091212 423 0.2- 0.4+ 100911 H06 1.1+ 0.2+ 091010 474 0.0 0.0 091215 415 0.8- 0.1+ 100911 H06 0.5+ 0.1- 091010 474 0.0 0.2- 091215 415 0.6- 0.5+ 100911 H06 0.0 0.5+ 091010 D25 0.0 0.1- 091216 423 0.0 0.7- 101002 H36 0.5- 1.5+ 091010 D25 0.7+ 0.2+ 091216 423 0.2- 0.1+ 101002 H36 0.6- 0.0 091010 D90 0.5+ 0.2- 2010/ 101005 372 1.1+ 1.2+ 091010 E12 0.5+ 0.1+ 100104 415 0.8- 1.3+ 101010 349 0.8- 0.1- 091010 E12 0.1+ 0.0 100104 415 0.8- 0.1+ 101010 349 0.1+ 1.4- 091010 E12 0.3+ 0.2- 100105 D90 0.7- 0.5+ 101104 703 0.3+ 0.4+ 091010 D25 (2.0- 0.8+) 100105 D90 0.2- 0.0 101104 703 0.3+ 0.3+ 091010 D25 (7.0- 3.7-) 100108 415 0.5- 0.2+ 101104 703 0.2- 0.8- 091011 I77 1.2- 1.4- 100108 415 0.3- 0.7+ 101104 703 1.7- 0.1- 091011 I77 0.0 0.6+ 100108 423 0.1- 0.5+ 101107 415 0.2- 1.5+ 091011 I77 0.1+ 0.3- 100109 423 0.4- 0.0 101107 415 0.9- 0.6+ 091011 474 0.1+ 0.1+ 100109 423 0.5+ 0.9- 101204 349 0.9+ 0.5- 091011 474 0.1+ 0.1+ 100114 C51 0.7+ 0.4- 101204 349 0.5+ 0.2- 091011 474 0.0 0.1+ 100114 C51 0.3- 0.0 101211 204 0.4- 1.2+ 091011 423 0.4- 0.0 100114 C51 (1.4+ 2.5-) 101213 703 0.5+ 0.4+ 091011 423 0.0 0.2- 100114 C51 0.2- 1.6- 101213 703 0.2+ 0.4+ 091014 423 0.0 0.5+ 100114 C51 0.5- 0.6+ 101213 703 0.5+ 1.1- 091014 423 0.3+ 1.0+ 100114 C51 0.5+ 0.3- 101213 703 0.9+ 0.5- 091016 423 0.1- 0.2+ 100114 C51 (2.8+ 3.4+) 101231 372 0.1- 0.7+ 091016 423 0.1- 0.3+ 100114 C51 0.1+ 1.5- 101231 372 0.6+ 0.7- 091016 D90 0.9- 0.4- 100114 C51 0.8+ 0.7- 101231 372 0.4- 0.6- 091016 D90 0.2- 0.0 100114 C51 0.7+ 1.1- 2011/ 091018 423 0.3+ 0.0 100115 C51 0.1- 1.2- 110102 900 1.1+ 0.9- 091018 423 0.3- 0.2- 100115 C51 1.9+ 1.8- 110102 900 0.1+ 1.4- 091105 D90 0.4+ 0.2- 100115 C51 1.0+ 1.2+ 110206 215 0.6- 0.9- 091105 D90 0.0 0.1+ 100115 C51 1.2- 0.1+ 110206 215 0.1- 1.0+ 091105 D90 0.3- 0.2+ 100115 C51 1.1+ 1.7- 110206 215 0.9- 0.6+ 091108 415 0.5+ 0.1- 100115 C51 0.5+ 1.1- 110208 104 (0.3- 2.2-) 091108 415 0.6- 1.0- 100115 C51 (1.7- 2.0+) 110208 104 1.0- 0.3- 091109 423 0.1- 0.1- 100115 C51 (0.2- 3.5+) 110213 349 (1.9- 2.1-) 091109 423 0.2+ 0.5+ 100115 C51 (3.3- 2.8+) 110213 349 1.0- 0.8- 091110 423 0.5- 0.5+ 100115 C51 (1.6- 2.9-) 110302 E07 0.5+ 1.4+ 091110 423 0.1+ 0.2+ 100115 C51 0.9+ 0.4- 110302 E07 (2.8+ 4.2-) 091113 D25 0.7+ 0.8+ 100115 C51 0.2- 1.6- 110307 E07 0.8- 0.6+ 091113 D25 0.3- 0.5+ 100115 C51 1.6+ 0.7- 110307 E07 1.3+ 1.4+ 091113 D25 0.3+ 0.8+ 100115 C51 (0.5+ 3.3-) 111004 C32 0.1- 0.9- 091118 E12 0.1- 0.4- 100115 C51 0.5- 1.8+ 111004 C32 0.2- 0.5- 091125 D25 0.1- 0.6+ 100115 C51 1.6- 0.2- ( ) -------- Rejected Obs.
Associate of Central Bureau for Astronomical Telegrams Syuichi Nakano 2012 Apr. 26