Nakano Note (Nakano wa Kangaeru noda) NK 3393 P/LONEOS (2007 RS41 = 2017 Q2)
The following improved orbital elements, by S. Nakano, are from 43 observations 2007 to 2017. 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. Residuals for 2017 observations were +0.34 deg for Right Ascension and +0.09 deg for Declination from an orbit in MPO 126789 with the delta-T correction = -1.25 days. Epoch = 2017 Sept. 4.0 TT T = 2017 Aug. 20.12095 +/- 0.12173 (m.e.) TT Peri. = 200.03605 +/- 0.02549 Node = 149.80296 +/- 0.00117 (2000.0) Inc. = 10.26387 +/- 0.00056 q = 3.1398880 +/- 0.0000460 AU e = 0.3229176 +/- 0.0000100 a = 4.6373794 +/- 0.0000207 AU n' = 0.09869500 +/- 0.00000066 P = 9.986 +/- 0.0000670 years T = 2007 Sept.10.69818 TT Epoch = 2007 Sept.17.0 TT Peri. = 199.92517 e = 0.3248990 Node = 149.87750 (2000.0) a = 4.6086006 AU Inc. = 10.28403 n'= 0.09962090 q = 3.1112709 AU P = 9.894 years The predicted orbit for the 2027 return is as follows: T = 2027 Aug. 23.69779 TT Epoch = 2027 Aug. 23.0 TT Peri. = 200.14469 e = 0.3228060 Node = 149.68614 (2000.0) a = 4.6441929 AU Inc. = 10.26201 n'= 0.09847788 q = 3.1450197 AU P = 10.008 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2007/ 070915 704 1.5+ 1.2+ 071016 G96 0.3+ 0.1- 070821 699 0.0 0.2- 070915 704 0.9+ 0.4+ 071016 G96 0.7+ 0.0 070821 699 1.5- 0.7- 070915 704 1.3+ 0.9+ 071016 G96 0.6+ 0.0 070821 699 0.7- 0.2- 070915 704 0.6+ 0.2+ 2017/ 070821 699 1.0- 0.1+ 070918 704 0.5- 0.5+ 170822 F51 0.2- 0.0 070909 699 0.3- 0.2+ 070918 704 0.6+ 0.1+ 170822 F51 0.2- 0.2- 070909 699 0.2- 0.0 070918 699 0.6+ 0.9+ 170822 F51 0.2- 0.1- 070909 699 0.3+ 0.4- 070918 704 0.9+ 0.6- 170822 F51 0.0 0.0 070912 703 1.2- 1.3+ 070918 699 0.4+ 0.2+ 170823 W96 1.0- 0.0 070912 703 (2.4- 0.4-) 070918 699 1.3- 0.6- 170823 W96 1.4- 0.0 070912 703 0.8- 0.4+ 070918 699 0.5- 0.1- 170823 W96 1.4- 0.1+ 070912 703 0.8- 0.7- 071015 G96 0.3+ 0.4+ 170823 568 0.3+ 0.0 070912 691 1.0- 0.1- 071015 G96 0.2+ 0.4+ 170823 568 0.3+ 0.0 070912 691 0.5- 0.5- 071015 G96 0.6+ 0.1+ 170823 568 0.3+ 0.0 070912 691 0.2- 0.3- 071015 G96 0.4+ 0.1+ 070915 704 0.9- 0.5+ 071016 G96 0.5+ 0.4- ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2017 Sept. 2