Nakano Note (Nakano wa Kangaeru noda) NK 1946 237P/LINEAR (2002 LN13 = 2010 L2)
The following improved orbital elements, by S. Nakano, are from 51 observations 2002 to 2010. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.57 arc second. Epoch = 2009 Nov. 25.0 TT T = 2009 Dec. 2.73677 +/- 0.01968 (m.e.) TT Peri. = 20.63445 +/- 0.00336 Node = 252.43540 +/- 0.00008 (2000.0) Inc. = 16.15378 +/- 0.00005 q = 2.4157212 +/- 0.0000275 AU e = 0.3527605 +/- 0.0000089 a = 3.7323448 +/- 0.0000179 AU n' = 0.13668833 +/- 0.00000098 P = 7.211 +/- 0.0000518 years T = 2002 Sept.10.76073 TT Epoch = 2002 Sept. 3.0 TT Peri. = 20.46450 e = 0.3515908 Node = 252.49420 (2000.0) a = 3.7398073 AU Inc. = 16.14431 n'= 0.13627940 q = 2.4249257 AU P = 7.232 years The predicted orbit for the 2016 return is as follows: T = 2016 Oct. 11.58327 TT Epoch = 2016 Oct. 19.0 TT Peri. = 25.03759 e = 0.4344887 Node = 245.43038 (2000.0) a = 3.5094697 AU Inc. = 14.02089 n'= 0.14991387 q = 1.9846446 AU P = 6.574 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2002/ 020612 644 0.2- 0.0 2010/ 020517 704 0.2- 0.7- 020612 704 0.4+ 0.6+ 100610 C51 0.6+ 0.0 020517 704 0.4- 0.2+ 020612 704 0.7- 0.3- 100610 C51 0.0 0.0 020517 704 0.3+ 1.0+ 020612 644 0.1- 0.2+ 100610 C51 0.7- 1.3- 020606 704 0.2+ 0.0 020612 704 0.2+ 0.2+ 100610 C51 (0.3+ 2.7-) 020606 704 0.6+ 0.0 020612 644 0.4- 0.6+ 100610 C51 0.7+ 1.1- 020606 704 0.1+ 0.1+ 020617 644 0.1- 0.2- 100610 C51 0.5+ 0.2- 020606 704 0.2- 0.8- 020617 644 0.5- 0.3- 100611 C51 0.7+ 0.6- 020608 704 1.0+ 0.1+ 020617 644 0.2- 0.6- 100611 C51 0.7+ 0.4+ 020608 704 0.2+ 0.1+ 020618 704 0.5+ 1.3- 100611 C51 0.6+ 0.5+ 020608 704 0.4+ 0.0 020618 704 0.3- 0.3- 100611 C51 0.8- 0.2- 020608 704 0.4+ 0.4- 020618 704 0.5- 0.4- 100611 C51 0.0 0.6- 020608 704 0.6+ 0.3- 020618 704 0.2- 0.1- 100611 C51 0.3+ 0.1+ 020609 704 0.7- 0.2- 020714 704 0.3- 1.2+ 100611 C51 0.5+ 0.7+ 020609 704 0.1+ 0.1+ 020714 704 0.7+ 1.5+ 100611 C51 0.5- 0.4+ 020609 704 0.0 0.6+ 020714 704 1.3+ 1.3+ 100615 291 0.9- 0.5+ 020609 704 0.7- 0.5- 020809 608 0.8- 0.4- 100615 291 0.6- 0.6+ 020612 704 0.3- 0.1- 020809 608 0.4- 0.8- 100615 291 0.9- 0.5+ ( ) -------- Rejected Obs.
Associate of Central Bureau for Astronomical Telegrams Syuichi Nakano 2010 June 18