Nakano Note (Nakano wa Kangaeru noda) NK 1823 224P/LINEAR-NEAT (2003 XD10 = 2009 Q2)

The following improved orbital elements, by S. Nakano, are from 88 observations 2003 to 2009. 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. The delta-T correction for the prediction in NK 1119 is -0.11 day. See an orbit on YC 2414. Epoch = 2010 Feb. 13.0 TT T = 2010 Jan. 31.83389 +/- 0.00451 (m.e.) TT Peri. = 16.09308 +/- 0.00138 Node = 40.52844 +/- 0.00012 (2000.0) Inc. = 13.43606 +/- 0.00012 q = 1.9895932 +/- 0.0000128 AU e = 0.4163775 +/- 0.0000036 a = 3.4090416 +/- 0.0000089 AU n' = 0.15658697 +/- 0.00000062 P = 6.294 +/- 0.0000248 years T = 2003 Sept.16.84015 TT Epoch = 2003 Aug. 29.0 TT Peri. = 9.14022 e = 0.4366590 Node = 43.55500 (2000.0) a = 3.3386522 AU Inc. = 14.72695 n'= 0.16156501 q = 1.8807997 AU P = 6.100 years The predicted orbit for the 2016 return is as follows: T = 2016 May 24.61641 TT Epoch = 2016 May 12.0 TT Peri. = 16.32255 e = 0.4159192 Node = 40.47500 (2000.0) a = 3.4127467 AU Inc. = 13.42600 n'= 0.15633204 q = 1.9933199 AU P = 6.305 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2003/ 031216 854 (2.3+ 1.5+) 031228 341 1.6+ 1.1+ 031120 704 0.2- 0.1- 031216 854 0.7- 0.2- 031228 341 1.6+ 0.6+ 031120 704 (2.1+ 3.8+) 031216 854 (3.2- 0.4+) 031228 360 0.0 0.2- 031120 704 0.5+ 0.9+ 031216 673 0.9+ 0.2- 031228 360 0.1+ 0.4+ 031204 704 0.2+ 0.2+ 031216 673 0.6+ 0.1+ 031228 360 0.3- 0.1- 031204 704 0.3+ 1.2- 031216 673 0.5+ 0.2+ 031230 704 0.4- 0.7- 031204 704 1.2- 0.0 031216 673 0.4+ 0.3+ 031230 704 0.8+ 0.2- 031204 704 0.7- 1.0- 031216 673 0.1+ 0.2+ 031230 704 0.0 0.3- 031205 704 1.1- 0.5- 031216 673 0.4+ 0.5+ 031230 704 0.9+ 0.1+ 031205 704 0.6+ 0.3- 031216 926 0.2+ 0.4+ 031230 372 0.6+ 0.1- 031205 704 0.0 0.6+ 031216 926 0.7- 0.3+ 2004/ 031214 644 0.5+ 0.6+ 031216 926 0.8- 0.7- 040101 213 0.6- 0.6- 031214 644 0.3+ 0.4+ 031216 J95 0.3+ 0.1- 040101 213 0.6- 0.1+ 031214 644 0.8+ 0.1- 031216 J95 0.4+ 0.0 040110 104 1.0- 0.2+ 031214 J95 0.1- 0.7- 031216 J95 0.6- 0.0 040110 104 0.3+ 0.4- 031214 J95 0.5- 0.0 031217 446 1.3- 0.8- 040110 104 0.1+ 0.9- 031214 J95 0.4- 0.9- 031217 446 0.3- 1.0+ 040117 360 0.1+ 0.5- 031215 966 0.1- 0.2+ 031217 673 0.4+ 0.7+ 040117 360 0.0 0.1+ 031215 J95 0.8+ 0.4- 031217 673 0.1- 0.4+ 040117 360 0.6+ 0.2- 031215 966 0.4+ 0.1+ 031217 926 0.5+ 0.1- 040210 204 0.0 0.5+ 031215 J95 0.1- 0.2- 031217 926 0.2- 0.0 040215 204 (1.7- 5.2+) 031215 J95 0.5- 0.4+ 031217 649 0.5- 0.1- 2009/ 031215 926 0.3- 0.2+ 031217 926 0.2- 0.4+ 090827 291 0.3+ 0.4- 031215 926 0.8- 0.1- 031217 701 0.7- 1.0+ 090827 291 0.1+ 0.2+ 031215 926 0.1- 0.0 031217 701 0.0 0.2- 090827 291 0.3+ 0.2- 031215 A50 0.4+ 0.5- 031219 372 1.0+ 0.6+ 090828 291 0.2- 0.0 031215 J95 0.1- 0.5- 031219 372 1.2+ 0.7+ 090828 291 0.1+ 0.3+ 031215 A50 0.1- 0.3+ 031219 372 0.1+ 0.1+ 090828 291 0.1- 0.2+ 031215 A50 0.7- 0.2+ 031221 372 0.2+ 1.3+ 090829 291 0.1- 0.2+ 031215 J95 0.4+ 0.2+ 031224 213 (1.6- 2.3-) 090829 291 0.2+ 0.4- 031215 J95 0.4+ 0.4- 031224 213 1.9- 1.8- 090829 291 0.5- 0.0 031215 A50 0.7- 0.4+ 031224 213 0.4+ 0.3+ 031215 A50 (2.3- 1.2+) 031228 341 1.4- 0.9- ( ) -------- Rejected Obs.

Associate of Central Bureau for Astronomical Telegrams Syuichi Nakano 2009 Sept. 5

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