Nakano Note (Nakano wa Kangaeru noda) NK 2571 271P/van Houten-Lemmon
The following improved orbital elements, by S. Nakano, are from 53 observations 1960 to 2013. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.33 arc second. The comet has passed 0.63 AU from Jupiter on 1979 March 10.8 UT. Recent observations show the residuals of about +50" mainly in R. A. from a linked orbit in NK 2355 (= HICQ 2013) with the delta-T correction = -0.11 day. See an orbit and the prediction in NK 165, NK 216 and HICQ 2010/2011. Epoch = 2013 July 7.0 TT T = 2013 July 5.80055 +/- 0.00333 (m.e.) TT Peri. = 35.13384 +/- 0.00041 Node = 9.58411 +/- 0.00006 (2000.0) Inc. = 6.85428 +/- 0.00005 q = 4.2493672 +/- 0.0000026 AU e = 0.3913511 +/- 0.0000003 a = 6.9816392 +/- 0.0000008 AU n' = 0.05342788 +/- 0.00000001 P = 18.447 +/- 0.0000032 years T = 1961 May 2.75873 TT Epoch = 1961 May 21.0 TT Peri. = 15.47941 e = 0.3755848 Node = 23.67647 (2000.0) a = 6.3001968 AU Inc. = 6.62178 n'= 0.06232652 q = 3.9339385 AU P = 15.814 years [ T = 1977 Mar. 14.42829 TT Epoch = 1977 Feb. 26.0 TT Peri. = 14.91330 e = 0.3817352 Node = 23.36595 (2000.0) a = 6.4032367 AU Inc. = 6.57216 n'= 0.06082817 q = 3.9588961 AU P = 16.203 years ] [ T = 1995 Apr. 28.18848 TT Epoch = 1995 May 3.0 TT Peri. = 35.26853 e = 0.3883374 Node = 9.85720 (2000.0) a = 6.8932001 AU Inc. = 6.88467 n'= 0.05445939 q = 4.2163129 AU P = 18.098 years ] The predicted orbit for the 2032 return is as follows: T = 2032 Mar. 22.58186 TT Epoch = 2032 Mar. 29.0 TT Peri. = 36.28797 e = 0.3957397 Node = 9.18291 (2000.0) a = 7.0673734 AU Inc. = 6.85726 n'= 0.05245864 q = 4.2705330 AU P = 18.788 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 1960/ 121009 F51 0.1+ 0.1+ 121105 H06 0.0 0.2- 600924 675 0.5+ 0.0 121009 F51 0.1+ 0.0 121106 C10 0.2+ 0.4+ 600926 675 0.2+ 1.0- 121009 F51 0.0 0.1+ 121106 C10 (0.8+ 2.8+) 600927 675 0.1+ 0.1+ 121014 G96 0.2+ 0.1- 121107 215 0.9+ 0.6- 600928 675 0.2- 0.1+ 121014 G96 0.5- 0.3- 121107 215 0.2+ 0.5- 601017 675 0.4- 0.8+ 121014 G96 0.3- 0.1- 121107 215 0.3- 0.5- 601022 675 1.2- 0.3+ 121014 G96 0.6- 0.1- 121113 C10 0.0 0.2- 601025 675 1.0+ 0.9- 121014 G96 0.4- 0.4- 121113 C10 0.1+ 0.3- 601026 675 0.1+ 0.6+ 121014 G96 0.1- 0.1+ 121113 C32 0.3+ 0.2+ 2012/ 121014 G96 0.0 0.3- 121113 C32 0.6+ 0.2+ 120917 G96 0.9- 0.1+ 121014 G96 0.2- 0.3+ 121113 C32 1.0+ 0.2+ 120917 G96 0.3- 0.2+ 121017 568 0.0 0.0 121113 C32 0.6+ 0.2+ 120917 G96 1.7- 0.2- 121017 568 0.0 0.0 121113 C10 0.3- 0.2- 120917 G96 0.5- 0.1+ 121017 568 0.0 0.0 2013/ 121005 G96 0.0 0.3- 121103 G96 0.1- 0.1+ 130901 H06 0.3- 0.6+ 121005 G96 0.1- 0.1- 121103 G96 0.1- 0.1+ 130901 H06 0.5- 0.5+ 121005 G96 0.2- 0.2+ 121103 G96 0.1- 0.1+ 130901 H06 0.5- 0.5+ 121005 G96 0.1- 0.3- 121103 G96 0.1- 0.5+ 130930 H06 0.8+ 0.3- 121009 F51 0.1+ 0.0 121105 H06 0.5+ 1.0- 130930 H06 0.3+ 0.6- ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2013 Oct. 19