Nakano Note (Nakano wa Kangaeru noda) NK 1965 P/LINEAR (1999 XB69 = 2010 C2)
The following improved orbital elements, by S. Nakano, are from 69 observations 1999 to 2010. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.58 arc second. The correction to the prediction in NK 734 (= MPC 56804, HICQ 2009/2010) is delta-T= -0.34 day. RunOff values are +237" for R.A. and -16" for Decl.. Epoch = 2009 July 28.0 TT T = 2009 July 25.56422 +/- 0.00133 (m.e.) TT Peri. = 220.32449 +/- 0.00024 Node = 256.05307 +/- 0.00007 (2000.0) Inc. = 11.30587 +/- 0.00003 q = 1.6521195 +/- 0.0000011 AU e = 0.6307617 +/- 0.0000003 a = 4.4743994 +/- 0.0000011 AU n' = 0.10413626 +/- 0.00000004 P = 9.465 +/- 0.0000033 years T = 2000 Feb. 17.03716 TT Epoch = 2000 Feb. 26.0 TT Peri. = 220.17974 e = 0.6319528 Node = 256.16691 (2000.0) a = 4.4539349 AU Inc. = 11.33647 n'= 0.10485479 q = 1.6392585 AU P = 9.400 years The predicted orbit for the 2019 return is as follows: T = 2019 Jan. 10.15775 TT Epoch = 2018 Dec. 28.0 TT Peri. = 220.37802 e = 0.6310552 Node = 255.90829 (2000.0) a = 4.4707919 AU Inc. = 11.30559 n'= 0.10426232 q = 1.6494755 AU P = 9.453 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 1999/ 000106 704 0.2- 0.3+ 000301 360 0.1- 0.5+ 991114 704 0.6+ 0.3- 000106 704 0.4- 0.3+ 000330 360 0.0 0.3+ 991114 704 0.3+ 0.0 000106 704 0.5- 0.3+ 000330 360 0.6+ 0.0 991114 704 0.7- 0.2+ 000106 704 0.1- 0.0 000424 360 0.4+ 0.3- 991114 704 0.2- 0.3- 000113 046 0.9+ 0.1+ 000424 360 0.1+ 0.4- 991116 704 0.1+ 1.3- 000113 046 0.1- 0.1- 000424 360 0.3- 1.2- 991116 704 0.3- 1.7- 000113 046 0.5- 0.5+ 000501 695 1.6+ 0.5+ 991116 704 0.5- 1.0- 000113 046 1.3+ 1.2+ 000501 695 1.4+ 0.4+ 991116 704 (0.2- 2.6-) 000113 046 0.3+ 0.6+ 000501 695 0.4+ 0.8+ 991207 704 0.2+ 0.3- 000113 046 0.7- 0.8+ 2008/ 991207 704 0.4- 0.1+ 000113 046 0.2- 0.5+ 081031 G96 0.6- 1.5+ 991207 704 0.1- 0.5- 000113 046 0.2- 0.1- 081031 G96 0.3+ 0.7+ 991207 704 0.2+ 0.2+ 000113 046 0.1- 0.1+ 081031 G96 0.1+ 0.7+ 991207 704 0.1+ 0.5- 000113 046 0.2+ 0.5+ 081031 G96 0.5+ 0.8+ 991208 704 0.1- 0.4- 000113 046 0.2+ 0.2+ 2010/ 991208 704 0.3- 0.0 000203 402 (8.8+ 3.6+) 100201 C51 0.5- 0.6- 991208 704 0.0 0.2- 000203 402 (8.8+ 8.6+) 100201 C51 1.3- 0.8- 991208 704 0.1- 0.0 000226 413 0.0 0.2- 100201 C51 0.2- 1.5+ 991208 704 0.1- 0.1+ 000226 413 0.1- 0.0 100201 C51 0.4- 0.1+ 2000/ 000227 693 0.2- 0.2- 100201 C51 0.7+ 0.4- 000105 704 0.1+ 0.0 000227 693 0.2- 0.2- 100202 C51 0.2+ 0.0 000105 704 0.1- 0.2+ 000301 402 1.3+ 0.4+ 100202 C51 0.0 0.7+ 000105 704 0.0 0.9- 000301 402 0.2+ 0.1- 100202 C51 0.2- 1.6- 000105 704 0.4- 0.1- 000301 402 0.2- 1.8- 100202 C51 0.3- 0.5- 000105 704 0.8- 0.6- 000301 360 0.3+ 0.4+ 000106 704 0.2- 0.7+ 000301 360 0.1+ 0.4+ ( ) -------- Rejected Obs.
Associate of Central Bureau for Astronomical Telegrams Syuichi Nakano 2010 Aug. 20