Nakano Note (Nakano wa Kangaeru noda) NK 2197 C/2011 L2 (McNaught)
The following improved orbital elements, by S. Nakano, are from 44 observations 2011 June 2 to 2012 Jan. 28. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The comet has passed 3.83 AU from Jupiter on 2010 Aug. 3 UT. The mean residual is +/- 0.57 arc second. Epoch = 2011 Nov. 15.0 TT T = 2011 Nov. 1.27446 +/- 0.00133 (m.e.) TT Peri. = 257.02951 +/- 0.00062 Node = 131.34853 +/- 0.00006 (2000.0) Inc. = 104.25789 +/- 0.00008 q = 1.9434449 +/- 0.0000103 AU e = 1.0018342 +/- 0.0000167 1/a = -0.0009438 +/- 0.0000086 1/AU origin = -0.000046 (Q= 7) future = +0.000149 The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2011/ 110629 E03 0.3- 0.2+ 110820 E03 0.4- 0.5+ 110602 E12 1.2- 0.3- 110629 E03 0.2- 0.7+ 110820 E03 0.2+ 0.5+ 110602 E12 0.2+ 0.3- 110629 E03 0.4- 1.5+ 110821 E03 0.0 0.1- 110602 E12 0.6- 0.2- 110722 E03 0.3+ 1.5- 110821 E03 1.0+ 0.6+ 110603 807 0.6+ 0.1- 110722 E03 0.1+ 1.1- 110823 E07 0.2- 0.0 110603 807 0.7+ 0.4- 110722 E03 0.3+ 0.7- 110823 E07 0.1+ 0.3- 110603 807 0.1+ 0.4- 110726 E07 0.1- 1.2+ 110824 E07 0.0 0.3- 110603 807 0.2+ 0.2- 110726 E07 0.3- 0.3- 110824 E07 0.2- 0.1+ 110603 E12 0.1+ 0.3- 110801 I68 0.1+ 0.5- 110826 E07 0.2- 0.1- 110603 E12 0.1- 0.3- 110801 I68 0.0 0.8+ 110826 E07 0.4+ 0.5- 110605 E12 0.1- 0.3- 110803 E07 0.4+ 1.4- 2012/ 110606 474 0.0 0.7+ 110803 E07 0.1+ 0.8- 120116 E07 (0.6- 4.9-) 110606 474 0.6- 1.0+ 110804 E07 0.2- 1.8+ 120116 E07 (0.5- 3.7-) 110606 474 0.2+ 0.5+ 110804 E07 0.2+ 0.4- 120123 E07 (0.1- 4.1-) 110606 E12 0.2+ 0.3- 110812 E12 0.3+ 0.0 120123 E07 1.1+ 0.1- 110607 H06 (7.2- 2.2+) 110812 E07 0.1+ 0.1+ 120128 E07 0.3- 1.0+ 110607 H06 (6.1- 0.7+) 110812 E07 0.1- 0.3- 120128 E07 0.6- 0.8- ( ) -------- Rejected Obs.
Associate of Central Bureau for Astronomical Telegrams Syuichi Nakano 2012 Feb. 6