Nakano Note (Nakano wa Kangaeru noda) NK 1914 P/2008 R1 (Garradd)
The following improved orbital elements, by S. Nakano, are from 28 observations 2008 July 15 to Oct. 1. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.56 arc second. See the previous orbits on YC 2595, YC 2597 and HICQ 2008/2009. Epoch = 2008 Aug. 2.0 TT T = 2008 July 25.31195 +/- 0.01993 (m.e.) TT Peri. = 256.51137 +/- 0.01185 Node = 51.99500 +/- 0.00242 (2000.0) Inc. = 15.90295 +/- 0.00023 q = 1.7930671 +/- 0.0000374 AU e = 0.3423675 +/- 0.0000157 a = 2.7265490 +/- 0.0000317 AU n' = 0.21891933 +/- 0.00000382 P = 4.502 +/- 0.0000785 years +/- 0.03 day The predicted orbit for the 2013 return is as follows: T = 2013 Jan. 25.57279 TT Epoch = 2013 Jan. 28.0 TT Peri. = 256.56266 e = 0.3410017 Node = 51.96047 (2000.0) a = 2.7279223 AU Inc. = 15.89886 n'= 0.21875404 q = 1.7976961 AU P = 4.506 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2008/ 080902 E16 (1.9+ 3.5-) 080923 E12 0.5+ 0.4- 080715 E12 0.1+ 0.1- 080902 E16 (1.7+ 4.1-) 080924 F84 0.0 0.1+ 080902 E12 0.4- 1.4+ 080902 E16 (1.3+ 2.9-) 080924 E12 0.1+ 0.2- 080902 E12 (0.2+ 2.2+) 080902 E16 (2.0+ 3.4-) 080924 415 0.2- 0.9- 080902 E12 0.3+ 0.2+ 080902 E16 (1.1+ 2.7-) 080924 415 0.4- 0.5- 080902 E12 0.2+ 1.3+ 080902 E16 (1.2+ 3.2-) 080925 E12 0.2+ 0.6- 080902 E12 0.3+ 0.6- 080904 I77 0.3+ 0.8+ 080925 E12 0.1- 0.5- 080902 E12 0.1- 0.6- 080904 I77 1.3- 0.8+ 080927 423 0.6+ 0.6- 080902 E12 0.1+ 0.5- 080909 E12 0.2- 0.8- 080927 423 0.1- 0.4+ 080902 E12 0.3+ 0.4- 080923 F84 0.7- 1.0+ 080930 423 0.4- 1.4+ 080902 E12 0.1+ 0.7- 080923 F84 0.1- 0.3+ 081001 423 0.6+ 0.1+ 080902 E12 0.1+ 0.6- 080923 E12 0.1+ 0.1- 080902 E16 (1.1+ 3.4-) 080923 E12 0.3+ 0.0 ( ) -------- Rejected Obs.
Associate of Central Bureau for Astronomical Telegrams Late edition Syuichi Nakano 2008 Oct. 17