Nakano Note (Nakano wa Kangaeru noda) NK 2525 212P/NEAT

The following improved orbital elements, by T. Kobayashi, are from 98 observations 2000 to 2009. 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. See the previous orbits in YC 2605 and NK 1744. Epoch = 2008 Nov. 30.0 TT T = 2008 Dec. 3.26901 +/- 0.00030 (m.e.) TT Peri. = 15.04842 +/- 0.00013 Node = 98.92900 +/- 0.00004 (2000.0) Inc. = 22.39780 +/- 0.00002 q = 1.6544647 +/- 0.0000011 AU e = 0.5788757 +/- 0.0000003 a = 3.9286854 +/- 0.0000037 AU n' = 0.12657070 +/- 0.00000018 P = 7.787 +/- 0.0000110 years T = 2001 Feb. 25.74672 TT Epoch = 2001 Feb. 20.0 TT Peri. = 15.00614 e = 0.5803429 Node = 98.95739 (2000.0) a = 3.9175485 AU Inc. = 22.43933 n'= 0.12711081 q = 1.6440272 AU P = 7.754 years The predicted orbit for the 2016 return is as follows: T = 2016 Sept.10.41307 TT Epoch = 2016 Sept. 9.0 TT Peri. = 15.08064 e = 0.5800967 Node = 98.88611 (2000.0) a = 3.9165048 AU Inc. = 22.42805 n'= 0.12716163 q = 1.6445533 AU P = 7.751 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2000/ 081203 704 0.9+ 0.4+ 090124 349 0.1- 0.4- 001201 608 0.4- 0.9- 081225 H45 0.2- 0.4+ 090125 204 0.2- 0.0 001201 608 0.3- 1.0- 081225 H45 0.0 0.3+ 090125 204 0.1+ 0.3+ 001201 608 0.0 0.5- 081225 H45 0.0 0.1+ 090125 D80 (2.6+ 0.8+) 001226 608 0.3- 0.7- 081225 H45 0.1- 0.3+ 090125 D80 (1.5+ 0.3+) 001226 608 0.3- 0.1- 081225 H45 0.1- 0.4+ 090129 703 1.2- 0.0 001226 608 0.5- 0.6- 081225 H45 0.0 0.3+ 090129 703 1.0- 0.2+ 001229 608 0.6+ 0.6- 081228 H45 0.3+ 0.1- 090129 703 (2.7- 0.7+) 001229 608 1.1+ 0.7- 081228 H45 0.1+ 0.2+ 090130 703 (1.6- 0.4-) 001229 608 0.3+ 0.7- 081228 H45 0.2+ 0.1+ 090130 703 (2.4- 0.4+) 2001/ 081228 H45 0.1+ 1.1+ 090130 703 (0.6- 1.6-) 010104 608 (1.6+ 0.2-) 081228 H45 0.3- 0.7+ 090212 J40 1.0+ 1.1+ 010104 608 1.4+ 0.3+ 081230 H45 0.1- 0.3+ 090213 J40 0.9+ 0.3- 010104 608 1.4+ 0.2- 081230 H45 0.5+ 0.1+ 090213 J40 (2.0+ 1.0-) 010120 608 0.5+ 0.9+ 081230 H45 0.0 0.2+ 090214 704 0.6- 0.1- 010120 608 (0.1- 1.8+) 081230 H45 0.3+ 0.6+ 090214 704 0.9+ 0.2+ 010120 608 (0.8+ 2.9+) 081230 H45 0.3- 0.2+ 090214 704 0.2+ 0.2+ 010121 691 (0.9- 1.7-) 2009/ 090214 704 1.4+ 0.1+ 010121 699 0.3- 0.4+ 090102 703 0.8- 0.2+ 090214 704 0.5+ 0.8+ 010121 691 0.8- 0.0 090102 703 1.1- 0.1+ 090217 B37 (0.6+ 2.2-) 010121 699 1.3- 0.7+ 090102 703 0.9- 0.2- 090217 B37 0.1- 0.6- 010121 691 0.9- 0.0 090102 703 0.7- 0.3+ 090217 B37 0.1+ 0.3+ 010121 699 0.3+ 1.1+ 090102 D35 0.8+ 0.5+ 090217 B49 (6.0- 2.1-) 010121 699 0.5+ 0.7+ 090102 D35 0.5+ 0.3+ 090217 B49 (5.8- 2.6-) 010217 704 0.5+ 0.9- 090102 D35 0.6+ 0.2+ 090218 130 0.7+ 1.0- 010217 704 0.2+ 1.1- 090107 291 0.1+ 0.0 090218 130 (0.3- 2.1-) 010217 704 1.2+ 1.2- 090107 291 0.2+ 0.0 090218 130 0.0 0.1- 010221 704 0.3+ 0.3- 090107 291 0.8- 0.4+ 090218 130 0.9+ 0.3- 010221 704 0.2- 0.3- 090107 291 1.2- 0.4+ 090224 204 0.4+ 0.2- 010221 704 0.4+ 0.2- 090107 291 0.1+ 0.7+ 090224 204 0.6+ 0.2- 2008/ 090107 291 0.3- 0.2+ 090224 703 0.6- 0.7- 081030 691 0.2- 0.3+ 090116 704 0.9+ 0.1- 090224 703 1.1- 0.9- 081030 691 0.1- 0.4+ 090116 704 0.5+ 0.6+ 090224 703 (1.5- 0.4-) 081030 691 0.2- 0.1+ 090116 704 (1.7- 0.6+) 090224 703 (2.0- 0.8-) 081103 691 0.5- 0.2+ 090117 J24 (4.6+ 5.7+) 090228 215 1.0+ 0.9- 081103 691 0.8- 0.3+ 090117 J24 (0.3- 2.2+) 090228 215 0.7+ 0.7- 081103 691 0.7- 0.5+ 090122 B37 (1.9+ 1.1+) 090228 215 0.7+ 0.7- 081108 691 (1.7- 0.5+) 090122 B37 (1.2+ 2.8+) 090302 703 0.3- 0.3- 081108 691 1.0- 0.3+ 090122 B37 (0.6+ 2.3+) 090302 703 1.0- 1.0- 081108 691 0.5- 0.6+ 090122 204 0.0 0.2- 090302 703 (1.0- 2.0-) 081203 704 0.2- 0.1- 090122 204 0.1+ 0.3- 090302 703 0.9- 1.2- 081203 704 0.9+ 0.6+ 090124 349 0.3- 0.5- 081203 704 0.5+ 0.2+ 090124 349 0.2- 0.2- ( ) -------- Rejected Obs.

Associate of the CBAT Syuichi Nakano 2013 June 12

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