Nakano Note (Nakano wa Kangaeru noda) NK 2011 C/2009 W2 (Boattini)
The following improved orbital elements, by S. Nakano, are from 93 observations 2008 Dec. 22 to 2010 Nov. 8. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.60 arc second. The comet has passed 1.97 AU from Saturn on 2007 May 18 and will pass 2.91 AU from Jupiter on 2011 Oct. 29 UT. See the previous orbit in NK 1880 (= HICQ 2010/2011). Epoch = 2010 May 4.0 TT T = 2010 May 1.72642 +/- 0.00865 (m.e.) TT Peri. = 121.33327 +/- 0.00079 Node = 199.58397 +/- 0.00041 (2000.0) Inc. = 164.49000 +/- 0.00005 q = 6.9071371 +/- 0.0000364 AU e = 0.9990362 +/- 0.0000320 1/a = +0.0001395 +/- 0.0000046 1/AU origin = +0.000465 (Q= 7) future = +0.000507 The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2008/ 091124 926 0.1- 0.0 091216 204 0.2- 0.2- 081222 G96 0.1- 0.2+ 091124 926 0.3- 0.1+ 091216 204 0.3+ 0.1+ 081222 G96 0.2+ 0.8- 091124 A77 1.0+ 0.2+ 091216 372 0.1- 0.8- 081222 G96 0.6+ 0.4+ 091125 372 0.2- 1.6- 091216 372 0.4- 0.5+ 081222 G96 0.5- 0.4- 091125 372 0.4+ 1.0- 091223 585 0.2+ 0.1+ 2009/ 091126 850 0.3+ 0.1- 091223 372 0.4+ 0.5- 091121 703 0.0 1.0+ 091126 850 0.3- 0.3+ 091223 349 1.3+ 0.9+ 091121 703 1.1+ 1.3+ 091126 H10 0.7+ 0.1+ 091223 349 0.5+ 0.2- 091121 703 0.4- 1.0- 091126 H10 1.4+ 1.0- 091226 G68 0.6- 0.0 091121 703 1.1- 0.3- 091126 H10 0.5- 0.8- 091226 G68 0.6- 0.1+ 091123 703 0.2+ 1.2+ 091126 G96 0.1- 0.2+ 091228 118 0.8- 0.0 091123 703 0.2- 1.1- 091126 G96 0.6+ 0.1- 091228 118 0.7- 0.2+ 091123 703 0.4- 0.7- 091126 G96 0.0 0.2+ 091228 118 0.4- 0.1- 091123 G96 0.2- 0.2+ 091126 G96 0.6+ 0.1- 091228 118 0.6- 0.2- 091123 G96 0.7- 0.0 091126 G96 0.6- 0.1- 2010/ 091123 G96 0.2- 0.1+ 091126 349 1.6+ 0.8- 100104 215 0.1- 0.2+ 091123 G96 0.9- 0.5+ 091126 349 1.2+ 0.5- 100104 215 0.1- 0.3+ 091124 B18 0.2+ 0.1- 091127 585 0.1- 0.6- 100104 215 0.0 0.2- 091124 B18 0.4- 0.0 091127 585 0.9- 0.9+ 100117 349 1.7+ 0.3+ 091124 B18 0.3- 0.6- 091127 585 0.6- 1.0+ 100117 349 0.8+ 0.9- 091124 B18 0.3- 0.3- 091127 585 0.1+ 0.9+ 100118 204 0.3- 0.1- 091124 682 0.5+ 0.1- 091127 585 1.2+ 1.2+ 100119 204 0.4- 0.4- 091124 682 0.2+ 0.4+ 091207 473 0.1+ 0.0 100121 204 0.1+ 0.8- 091124 G96 0.4- 0.2+ 091207 473 0.2- 0.1+ 100123 349 0.2- 0.0 091124 G96 0.8+ 0.2+ 091209 104 0.4- 0.0 100123 349 0.7- 0.3- 091124 G96 0.3- 0.2+ 091209 104 0.1- 0.4- 100212 204 0.7+ 0.2- 091124 G96 0.1+ 0.3+ 091209 104 0.5- 0.7- 100212 204 0.6+ 0.1- 091124 H01 1.0- 0.1+ 091209 473 0.1- 0.2+ 101009 H21 1.0+ 0.4+ 091124 H01 1.0- 0.2+ 091209 473 0.1- 0.1+ 101009 H21 0.5+ 0.0 091124 H01 1.0- 0.0 091211 372 0.1- 0.4+ 101009 H21 0.3+ 0.0 091124 H01 1.0- 0.0 091211 372 1.2+ 1.9+ 101108 F65 0.6- 0.2- 091124 926 0.5+ 0.6+ 091211 372 0.7+ 0.6+ 101108 F65 0.9- 0.3- ( ) -------- Rejected Obs.
Associate of Central Bureau for Astronomical Telegrams Syuichi Nakano 2010 Nov. 29