Nakano Note (Nakano wa Kangaeru noda) NK 2401 P/2011 JB15 (Spacewatch-Boattini)
The following improved orbital elements, by S. Nakano, are from 117 observations 2010 May 13 to 2012 Aug. 15. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.64 arc second. See the previous orbits in HICQ 2012 and NK 2335. Epoch = 2012 Feb. 3.0 TT T = 2012 Jan. 21.55061 +/- 0.01518 (m.e.) TT Peri. = 110.92442 +/- 0.00156 Node = 153.75531 +/- 0.00043 (2000.0) Inc. = 19.14212 +/- 0.00003 q = 5.0187476 +/- 0.0000269 AU e = 0.3181660 +/- 0.0000174 a = 7.3606585 +/- 0.0000261 AU n' = 0.04935476 +/- 0.00000026 P = 19.970 +/- 0.0001062 years (+/- 0.04 day) The predicted orbit for the 2031 return is as follows: T = 2031 Dec. 7.95458 TT Epoch = 2031 Nov. 30.0 TT Peri. = 109.20119 e = 0.3305441 Node = 153.14411 (2000.0) a = 7.5516396 AU Inc. = 19.04446 n'= 0.04749438 q = 5.0554899 AU P = 20.752 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2010/ 110529 104 0.8- 0.0 110531 J04 0.3- 0.2- 100513 G96 0.8- 0.6- 110529 J04 0.1+ 0.2- 110531 J04 0.2+ 0.2- 100513 G96 0.2+ 0.2+ 110529 J04 0.3+ 0.2- 110531 J04 0.7+ 0.3- 100513 G96 0.3+ 0.8- 110529 J04 0.0 0.1+ 110531 J04 1.3+ 0.2- 100513 G96 0.4+ 0.3- 110530 470 0.5+ 0.6+ 110603 703 1.1- 0.9- 2011/ 110530 204 0.8- 1.1- 110603 703 1.2- 1.0- 110430 F51 0.5+ 0.4+ 110530 470 0.1- 0.6+ 110603 703 (2.3- 1.4-) 110430 F51 0.3+ 0.4+ 110530 204 0.2- 0.6- 110603 703 (2.5- 1.6-) 110430 F51 1.4+ 0.7+ 110530 204 0.2- 0.3- 110608 A77 1.0- 0.6- 110430 F51 0.3+ 0.6+ 110530 H06 0.1+ 0.9+ 110608 A77 1.2- 0.5- 110508 691 0.8- 0.1+ 110530 H06 0.2+ 0.1+ 110608 A77 1.0- 1.6- 110508 691 0.5- 0.1- 110530 H06 0.0 0.0 110610 A77 1.2- 1.4- 110508 691 0.7- 0.1- 110530 H06 1.3- 0.1- 110610 A77 1.1- 0.0 110512 691 0.9- 0.0 110530 H21 0.5- 0.5- 110626 H10 0.1- 0.6- 110512 691 0.6- 0.3- 110530 H21 0.5- 0.2- 110626 H10 0.5- 0.6- 110512 691 0.7- 0.2- 110530 H21 0.2- 0.1- 110626 H10 (2.1- 1.4-) 110528 G96 0.0 0.2- 110530 H21 0.5- 0.2- 110627 215 0.8- 0.3- 110528 G96 0.4+ 0.0 110530 H06 0.7- 0.4+ 110627 215 0.6- 0.3- 110528 G96 0.3- 0.8- 110530 H21 0.2- 0.2- 110627 215 0.7- 0.7- 110528 G96 0.1+ 0.1- 110530 H21 0.3- 0.2+ 110707 A71 0.6- 1.5- 110528 G96 1.5- 0.8- 110530 H21 0.3- 0.1- 110707 A71 0.2- 1.0- 110528 G96 1.1- 0.5- 110530 235 1.0- 1.1- 110726 F51 0.5+ 0.1+ 110528 G96 0.8- 0.6- 110530 235 1.0- 1.0- 110726 F51 0.9+ 0.4+ 110528 G96 0.9- 0.5- 110530 235 0.5- 0.3- 110906 D90 0.2+ 0.6+ 110528 595 0.8- 0.2- 110530 470 0.4+ 0.2+ 110906 D90 0.8- 0.5- 110528 A81 1.4- 0.8- 110530 470 0.8+ 0.2+ 110906 D90 1.0+ 0.3- 110528 A81 0.1+ 1.3- 110531 J95 0.8- 0.1- 110919 291 0.1+ 0.1- 110528 A81 (1.4+ 2.0-) 110531 J95 0.3+ 0.1- 110919 291 0.1- 0.6+ 110528 595 0.3- 0.0 110531 H21 0.5- 0.5- 110919 291 0.1+ 0.1- 110529 H10 1.2- 0.0 110531 H21 0.3- 0.5- 110921 291 0.1+ 0.5+ 110529 H10 0.4- 0.3- 110531 H21 0.6- 0.6- 110921 291 0.3+ 0.1+ 110529 H10 0.2- 0.4- 110531 H21 0.3- 0.4- 110921 291 0.4+ 0.5+ 110529 G96 0.0 0.6- 110531 H01 0.4+ 0.2+ 111002 D90 0.4+ 0.2- 110529 G96 0.5- 0.5- 110531 H01 0.5+ 0.2+ 111002 D90 1.3- 0.1+ 110529 G96 0.9- 0.7- 110531 H01 0.5+ 0.2+ 2012/ 110529 G96 0.7- 0.6- 110531 H01 0.5+ 0.3+ 120809 H06 0.3- 0.7- 110529 H10 0.9+ 0.1- 110531 682 0.6- 0.3- 120809 H06 0.1+ 0.9- 110529 H10 0.5- 0.1- 110531 682 0.9- 0.5- 120809 H06 0.5+ 1.1- 110529 H10 (2.3- 0.2-) 110531 B18 0.6+ 0.1- 120815 H06 0.1+ 0.9+ 110529 H06 1.8- 1.6+ 110531 B18 0.2+ 0.2+ 120815 H06 0.1- 0.9+ 110529 H06 1.8- 0.8+ 110531 B18 0.4- 0.5- 120815 H06 0.1- 1.0+ 110529 104 0.4- 0.3- 110531 J04 1.0- 0.1- ( ) -------- Rejected Obs.
Associate of Central Bureau for Astronomical Telegrams Syuichi Nakano 2013 Feb. 2