Nakano Note (Nakano wa Kangaeru noda) NK 2994 P/Van Ness (2002 Q1 = 2015 P2)
The following improved orbital elements, by S. Nakano, are from 58 observations 2002 to 2015. 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 residuals of recovery observations were -0.71 deg for R. A. and -0.14 deg for Decl. from the prediction in NK 983 (= MPC 56803, HICQ 2014) with the delta-T correction = +1.50 days. Epoch = 2015 Dec. 4.0 TT T = 2015 Dec. 12.40848 +/- 0.00430 (m.e.) TT Peri. = 185.09277 +/- 0.00049 Node = 173.96099 +/- 0.00035 (2000.0) Inc. = 36.21361 +/- 0.00020 q = 1.5602850 +/- 0.0000118 AU e = 0.5625588 +/- 0.0000031 a = 3.5668454 +/- 0.0000103 AU n' = 0.14631122 +/- 0.00000064 P = 6.736 +/- 0.0000293 years T = 2009 Mar. 21.70767 TT Epoch = 2009 Mar. 30.0 TT Peri. = 185.02012 e = 0.5640142 Node = 173.99739 (2000.0) a = 3.5578584 AU Inc. = 36.28117 n'= 0.14686594 q = 1.5511759 AU P = 6.711 years The predicted orbit for the 2022 return is as follows: T = 2022 Sept. 2.37893 TT Epoch = 2022 Sept.18.0 TT Peri. = 185.03007 e = 0.5633525 Node = 173.98322 (2000.0) a = 3.5635391 AU Inc. = 36.25024 n'= 0.14651490 q = 1.5560105 AU P = 6.727 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2002/ 020818 848 0.9- 0.3- 020918 360 0.2+ 0.6+ 020817 699 (2.7- 0.9+) 020818 848 0.1- 0.6- 020919 349 0.1- 0.9+ 020817 699 1.1- 0.0 020819 848 1.1+ 0.9- 020919 349 0.5+ 0.6- 020817 699 (4.5- 0.5+) 020819 848 0.4- 1.1- 020919 349 0.2- 1.6- 020817 699 (4.5- 0.3-) 020819 848 0.3- 0.5- 020923 340 (1.5- 2.3+) 020818 046 0.4+ 0.1+ 020819 413 0.7+ 0.3- 020923 340 (2.6- 0.4-) 020818 046 0.1+ 0.6- 020819 413 0.7+ 0.3- 020923 340 (9.0- 1.6+) 020818 046 0.8+ 0.0 020819 413 0.7+ 0.1+ 020923 340 (2.0- 2.8+) 020818 046 0.6- 0.2+ 020820 349 0.1- 0.6- 020930 118 0.2- 1.5+ 020818 046 1.2- 0.2- 020820 349 0.4+ 0.3- 020930 118 (0.0 2.5+) 020818 046 0.0 0.4- 020820 349 0.1- 0.1- 021010 699 0.8- 1.1+ 020818 046 0.4+ 0.2+ 020820 349 0.2+ 0.8- 021010 699 0.9- 0.3+ 020818 118 0.6+ 1.7+ 020821 170 0.2- 0.7+ 021010 699 0.3- 1.4+ 020818 118 1.3- 0.0 020821 170 0.9- 1.0- 021010 699 0.0 0.9+ 020818 118 0.9- 0.3+ 020830 349 (2.3- 0.9+) 021014 428 1.1+ 0.2- 020818 118 0.4+ 0.4- 020830 349 (2.9- 0.2-) 021014 360 0.6+ 0.9- 020818 620 (4.8- 1.0+) 020830 349 0.6- 1.6+ 021014 360 0.8+ 0.6- 020818 620 (2.2+ 0.1-) 020831 J95 (2.4- 1.6+) 021014 360 1.1+ 0.0 020818 620 (2.1- 0.6-) 020831 J95 0.5+ 1.4- 2015/ 020818 620 (1.2+ 2.1+) 020910 349 0.1+ 0.8- 150806 F51 0.1- 0.0 020818 620 1.2- 1.3+ 020910 349 0.7- 0.1- 150806 F51 0.1- 0.2- 020818 658 0.4+ 0.5- 020910 349 0.0 1.0+ 150806 F51 0.1+ 0.1+ 020818 658 0.0 0.4- 020912 360 0.0 0.4+ 150810 461 0.0 0.7+ 020818 658 0.1+ 0.4+ 020912 360 0.1+ 0.2+ 150810 461 0.6+ 0.5+ 020818 848 1.0- 0.5+ 020918 360 0.6+ 0.1+ 150810 461 0.2+ 0.7+ ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2015 Aug. 11