Nakano Note (Nakano wa Kangaeru noda) NK 2471 281P/MOSS

The following improved orbital elements, by S. Nakano, are from 95 observations 2000 to 2013. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.61 arc second. See the previous orbits in NK 2425 and NK 2425R. Epoch = 2012 June 2.0 TT T = 2012 May 14.34963 +/- 0.19427 (m.e.) TT Peri. = 26.67058 +/- 0.02401 Node = 87.17137 +/- 0.00085 (2000.0) Inc. = 4.72372 +/- 0.00005 q = 4.0137543 +/- 0.0000070 AU e = 0.1731021 +/- 0.0000020 a = 4.8539903 +/- 0.0000030 AU n' = 0.09216281 +/- 0.00000009 P = 10.694 +/- 0.0000100 years T = 2001 Aug. 16.09553 TT Epoch = 2001 July 30.0 TT Peri. = 26.38842 e = 0.1752539 Node = 87.31837 (2000.0) a = 4.9047126 AU Inc. = 4.72077 n'= 0.09073686 q = 4.0451423 AU P = 10.862 years The predicted orbit for the 2023 return is as follows: T = 2023 Feb. 1.93291 TT Epoch = 2023 Jan. 16.0 TT Peri. = 26.69524 e = 0.1728523 Node = 87.18003 (2000.0) a = 4.8775932 AU Inc. = 4.71818 n'= 0.09149465 q = 4.0344901 AU P = 10.772 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2000/ 130206 J43 0.3- 0.1- 130220 586 0.1- 0.0 001117 691 0.0 0.6- 130206 J43 0.0 0.3+ 130220 586 0.9- 0.2+ 001117 691 0.0 0.3- 130206 J43 0.2- 0.2+ 130220 586 0.1+ 0.4- 001117 691 0.2+ 0.1+ 130206 J43 0.3- 0.2+ 130220 586 0.2+ 0.1- 2002/ 130209 F51 0.0 0.1+ 130220 586 0.5+ 0.1+ 020204 644 1.4- 0.4- 130209 F51 0.3+ 0.1+ 130221 I93 0.5+ 0.7+ 020204 644 0.2+ 0.9+ 130209 F51 0.4+ 0.1+ 130221 I93 0.1- 0.4+ 020204 644 0.2- 0.8+ 130209 D29 1.4- 0.2- 130302 C10 1.2- 0.6+ 020208 608 0.8+ 0.2- 130209 D29 1.6- 0.3+ 130303 C10 1.2+ 1.0- 020208 608 0.4- 0.2- 130209 D29 (2.2- 0.1+) 130303 511 0.4- 0.3+ 020208 608 0.6- 0.6+ 130210 568 0.3+ 0.0 130303 511 0.5+ 0.8- 020214 644 0.3- 0.9- 130210 568 0.3+ 0.0 130303 C10 0.5- 0.0 020214 644 0.4- 0.4- 130210 568 0.3+ 0.0 130303 C10 0.0 0.1- 020223 644 1.2- 1.5- 130212 568 0.0 0.1- 130307 C10 0.8- 0.8- 020223 644 1.5- 0.5+ 130212 568 0.1+ 0.1- 130307 C10 1.5- 0.0 020223 644 1.3+ 0.2- 130212 568 0.2+ 0.0 130309 511 0.6- 0.0 020304 644 1.1- 0.1- 130214 568 0.2+ 0.0 130309 511 1.5- 0.9- 020304 644 1.0+ 1.1+ 130214 568 0.2+ 0.0 130311 E07 0.0 0.1- 020304 644 0.5- 0.4- 130214 568 0.2+ 0.0 130311 E07 0.4+ 0.7- 020312 644 1.4+ 1.0+ 130217 691 1.4- 0.2+ 130311 511 0.4- 0.8- 020312 644 1.4+ 0.7+ 130217 691 0.9- 0.4+ 130311 511 0.6- 0.2- 020312 644 0.8+ 0.8+ 130217 691 1.9- 0.3+ 130314 H45 1.0+ 0.3+ 020316 608 1.1+ 0.2+ 130218 C10 0.9- 0.1+ 130314 H45 0.0 0.2+ 020316 608 0.3+ 0.1- 130218 C10 0.5- 0.2+ 130314 H45 0.3+ 0.1+ 2013/ 130218 C10 0.7- 0.5- 130314 H45 0.2- 0.1+ 130119 691 1.5- 0.7+ 130218 H06 0.9- 0.6+ 130314 C10 0.9- 0.4- 130119 691 0.7- 0.4+ 130218 H06 0.4- 0.5+ 130314 C10 1.1- 0.2- 130119 691 0.7- 0.3+ 130218 H06 0.1+ 0.4+ 130315 H45 0.8+ 1.8- 130205 J43 0.1- 0.3+ 130220 511 0.8- 0.1- 130315 H45 0.1+ 0.7- 130205 J43 0.9- 0.2- 130220 C10 1.3- 0.1+ 130315 H45 0.4+ 0.4- 130205 J43 0.2- 0.1+ 130220 C10 0.7- 0.0 130315 215 0.6- 0.2+ 130205 J43 1.2- 0.2+ 130220 511 1.0- 0.1- 130315 215 0.4- 0.2+ 130206 J43 1.4+ 0.2+ 130220 C10 0.3- 0.1- 130315 215 0.4- 0.0 ( ) -------- Rejected Obs.

Associate of Central Bureau for Astronomical Telegrams Syuichi Nakano 2013 Apr. 5

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