Nakano Note (Nakano wa Kangaeru noda) NK 2438 C/2012 E1 (Hill)
The following improved orbital elements, by S. Nakano, are from 88 observations 2011 June 10 to 2012 July 25. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.56 arc second. See an orbit in HICQ 2012. Epoch = 2011 July 18.0 TT T = 2011 July 4.44008 +/- 0.09629 (m.e.) TT Peri. = 48.90576 +/- 0.00674 Node = 286.30481 +/- 0.00033 (2000.0) Inc. = 122.53432 +/- 0.00009 q = 7.5033813 +/- 0.0001956 AU e = 0.9981683 +/- 0.0000652 1/a = +0.0002441 +/- 0.0000087 1/AU origin = +0.000855 (Q= 7) future = +0.000782 The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2011/ 120304 H21 0.1- 0.3+ 120322 H06 0.4+ 0.3- 110610 691 0.1- 0.1+ 120304 H21 0.2- 0.2+ 120324 349 0.2- 0.1- 110610 691 0.3+ 0.3+ 120304 H21 0.1- 0.1+ 120324 349 1.1+ 1.0+ 110610 691 0.2+ 0.3- 120304 H21 0.2- 0.0 120424 C32 0.4+ 0.2+ 2012/ 120304 H21 0.4- 0.2- 120424 C32 0.4+ 0.6- 120302 G96 0.1- 0.7- 120304 G96 0.5- 0.2- 120424 C32 0.3+ 0.0 120302 G96 0.1+ 0.5- 120304 G96 0.5- 0.4- 120503 213 0.2+ 0.2+ 120302 G96 0.2+ 0.7- 120304 G96 0.3- 0.2+ 120503 213 0.4- 0.7+ 120302 G96 0.1- 0.6- 120305 J95 0.4- 1.0- 120503 213 0.6- 0.4+ 120302 G96 0.1- 0.3- 120305 J95 0.6+ 0.2+ 120519 215 0.0 0.6- 120302 G96 0.0 0.2- 120305 H01 0.2+ 0.7+ 120519 215 0.1+ 0.6- 120302 G96 0.5- 0.5- 120305 H01 0.3+ 1.1+ 120519 215 0.2+ 0.7- 120302 G96 0.4- 0.1- 120305 H01 0.1+ 0.8+ 120524 130 0.2+ 0.4- 120303 595 0.2- 1.3- 120305 H01 0.1+ 0.9+ 120524 130 0.0 0.6- 120303 204 0.4- 0.2+ 120305 H36 0.2+ 0.4+ 120524 130 0.1+ 0.4- 120303 106 0.3+ 0.3- 120305 H36 0.3- 0.3- 120524 130 1.0- 0.8- 120303 106 0.5- 1.1+ 120305 H06 0.6+ 0.1- 120524 703 0.7+ 0.4+ 120303 106 0.5+ 0.5+ 120305 H06 0.0 0.7+ 120524 703 0.1+ 1.2- 120303 595 0.6- 0.7- 120312 213 0.3- 0.7- 120524 703 0.0 1.0+ 120303 204 0.4- 0.1- 120312 213 0.1+ 0.6- 120524 703 1.0- 0.3- 120303 G96 0.1- 0.1- 120316 I89 0.3+ 0.6+ 120524 A71 0.2+ 0.0 120303 G96 0.1- 0.4- 120316 I89 0.3+ 0.7+ 120524 A71 1.1+ 0.2+ 120303 G96 0.5- 0.7- 120316 I89 0.4+ 0.6+ 120531 G96 0.0 0.7+ 120303 G96 0.5- 0.4- 120321 703 0.9+ 1.1- 120531 G96 0.8- 0.4+ 120304 I89 0.7- 0.8- 120321 703 0.6+ 0.8- 120531 G96 0.8- 0.7+ 120304 I89 0.6- 0.1+ 120321 703 0.2- 0.4+ 120531 G96 1.1- 0.6+ 120304 291 0.1- 0.5+ 120321 703 1.8+ 0.8- 120725 C32 (2.3+ 0.5+) 120304 291 0.8- 1.2+ 120322 C10 1.1+ 0.9- 120725 C32 1.5+ 0.2+ 120304 291 0.4- 0.7+ 120322 C10 0.6+ 0.0 120725 C32 0.6- 0.4+ 120304 H21 0.1- 0.3+ 120322 H06 0.0 1.3+ 120304 H21 0.2- 0.3+ 120322 H06 0.4+ 0.3+ ( ) -------- Rejected Obs.
Associate of Central Bureau for Astronomical Telegrams Syuichi Nakano 2013 Apr. 2