Nakano Note (Nakano wa Kangaeru noda) NK 3365 259P/Garradd
The following improved orbital elements, by S. Nakano, are from 47 observations 2008 to 2017. 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. Residuals in re-observations on 2017 April were -9" mainly for Right Ascension from the prediction in NK 2247 (= HICQ 2016-2017) with the delta-T correction = +0.005 day. See the previous orbits in NK 1914, NK 2095 and NK 2274. Epoch = 2017 July 26.0 TT T = 2017 Aug. 4.03131 +/- 0.00006 (m.e.) TT Peri. = 257.50368 +/- 0.00005 Node = 51.48436 +/- 0.00004 (2000.0) Inc. = 15.88973 +/- 0.00001 q = 1.8089670 +/- 0.0000006 AU e = 0.3377096 +/- 0.0000002 a = 2.7313803 +/- 0.0000004 AU n' = 0.21833875 +/- 0.00000005 P = 4.514 +/- 0.0000011 years T = 2008 July 25.30504 TT Epoch = 2008 Aug. 2.0 TT Peri. = 256.50802 e = 0.3423325 Node = 51.99543 (2000.0) a = 2.7264066 AU Inc. = 15.90316 n'= 0.21893649 q = 1.7930689 AU P = 4.502 years T = 2013 Jan. 25.43682 TT Epoch = 2013 Jan. 28.0 TT Peri. = 256.55931 e = 0.3409668 Node = 51.96090 (2000.0) a = 2.7277787 AU Inc. = 15.89907 n'= 0.21877131 q = 1.7976968 AU P = 4.505 years The predicted orbit for the 2022 return is as follows: T = 2022 Feb. 8.40655 TT Epoch = 2022 Jan. 21.0 TT Peri. = 257.64639 e = 0.3386693 Node = 51.44998 (2000.0) a = 2.7303260 AU Inc. = 15.89060 n'= 0.21846522 q = 1.8056485 AU P = 4.512 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2008/ 080923 F84 (0.7- 2.1+) 2012/ 080715 E12 (3.0- 0.3-) 080923 F84 0.0 1.5+ 120414 I33 0.1- 0.0 080902 E12 (1.3- 2.2+) 080923 E12 0.2+ 1.1+ 120414 I33 0.1- 0.1- 080902 E12 (0.7- 3.0+) 080923 E12 0.4+ 1.1+ 120415 568 0.1+ 0.1+ 080902 E12 0.6- 1.0+ 080923 E12 0.6+ 0.8+ 120415 568 0.2- 0.2+ 080902 E12 (0.6- 2.1+) 080924 F84 0.1+ 1.3+ 120415 568 0.1+ 0.1+ 080902 E12 0.6- 0.2+ 080924 E12 0.2+ 0.9+ 2017/ 080902 E12 1.0- 0.2+ 080924 415 0.1- 0.3+ 170426 I11 0.1+ 0.1- 080902 E12 0.7- 0.3+ 080924 415 0.3- 0.6+ 170426 I11 0.1- 0.1+ 080902 E12 0.6- 0.4+ 080925 E12 0.3+ 0.5+ 170426 I11 0.1- 0.3+ 080902 E12 0.8- 0.1+ 080925 E12 0.0 0.7+ 170426 I11 0.0 0.1+ 080902 E12 0.8- 0.2+ 080927 423 0.8+ 0.6+ 170426 I11 0.2- 0.1+ 080902 E16 (0.2+ 2.6-) 080927 423 0.1+ 1.6+ 170426 I11 0.0 0.1+ 080902 E16 (1.0+ 2.6-) 080930 423 (0.0 2.6+) 170426 I11 0.1+ 0.1+ 080902 E16 (0.9+ 3.3-) 081001 423 0.9+ 1.3+ 170429 I11 0.1- 0.0 080902 E16 (0.4+ 2.1-) 2010/ 170429 I11 0.1+ 0.0 080902 E16 (1.1+ 2.6-) 100413 568 1.1+ 1.9- 170429 I11 0.2+ 0.1- 080902 E16 0.3+ 1.9- 2011/ 170429 I11 0.1+ 0.1- 080902 E16 (0.3+ 2.4-) 110203 568 0.3+ 0.3+ 170429 I11 0.1- 0.1- 080904 I77 0.5- 1.6+ 110203 568 0.3+ 0.3+ 170429 I11 0.0 0.2- 080904 I77 (2.1- 1.7+) 110205 568 0.4+ 0.6+ 170429 I11 0.1+ 0.0 080909 E12 0.8- 0.1+ 110205 568 0.0 0.6+ ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2017 June 7