Nakano Note (Nakano wa Kangaeru noda) NK 5405 P/2009 KF37
The following improved orbital elements, by S. Nakano, are from 78 observations 2001 to 2025. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.68 arc second. The comet has passed 0.95 AU from Jupiter on 2012 Jan. 15 UT. See the previous orbits in NK 4550 and CBET 5543 (same orbit). Epoch = 2025 Dec. 31.0 TT T = 2026 Jan. 17.63825 +/- 0.00032 (m.e.) TT Peri. = 143.94885 +/- 0.00011 Node = 111.94172 +/- 0.00011 (2000.0) Inc. = 11.38827 +/- 0.00001 q = 2.8351086 +/- 0.0000019 AU e = 0.3107490 +/- 0.0000005 a = 4.1133184 +/- 0.0000039 AU n' = 0.11814506 +/- 0.00000017 P = 8.342 +/- 0.0000119 years T = 2001 Oct. 7.87725 TT Epoch = 2001 Oct. 18.0 TT Peri. = 136.52961 e = 0.3411145 Node = 118.44440 (2000.0) a = 3.9480062 AU Inc. = 11.20646 n'= 0.12564272 q = 2.6012842 AU P = 7.845 years T = 2009 Aug. 9.13990 TT Epoch = 2009 July 28.0 TT Peri. = 136.66010 e = 0.3422535 Node = 118.39447 (2000.0) a = 3.9378849 AU Inc. = 11.21636 n'= 0.12612743 q = 2.5901301 AU P = 7.814 years T = 2017 Sept.26.40015 TT Epoch = 2017 Oct. 14.0 TT Peri. = 144.02101 e = 0.3127898 Node = 111.95066 (2000.0) a = 4.0978221 AU Inc. = 11.39995 n'= 0.11881586 q = 2.8160651 AU P = 8.295 years The predicted orbit for the 2034 return is as follows: T = 2034 May 25.19402 TT Epoch = 2034 June 7.0 TT Peri. = 144.35666 e = 0.3122195 Node = 111.82613 (2000.0) a = 4.1037071 AU Inc. = 11.40239 n'= 0.11856037 q = 2.8224497 AU P = 8.313 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2001/ 090601 I41 1.5- 0.0 160403 F51 0.2- 0.1- 010523 699 0.0 0.3- 090601 I41 1.2- 0.2- 2017/ 010523 699 0.4+ 0.6- 090714 I41 0.9- 0.2- 170406 F51 0.2+ 0.3- 010523 699 0.0 0.0 090714 I41 0.2+ 0.2- 170406 F51 0.1+ 0.2- 010523 699 1.2+ 0.2- 2014/ 170406 F51 0.1+ 0.6- 010618 699 0.1- 0.5+ 141229 W84 0.7+ 0.1+ 170426 F51 0.2+ 0.4- 010618 699 1.2+ 0.7- 141229 W84 0.5+ 0.0 170426 F51 0.1+ 0.1- 010618 699 0.8- 0.5+ 141229 W84 0.1+ 0.1- 170426 F51 0.1+ 0.4- 010618 699 0.5- 0.9- 141229 W84 0.5+ 0.3+ 170426 F51 0.0 0.2- 2009/ 2015/ 170428 F51 0.1- 0.4- 090527 I41 1.4- 0.2- 150110 W84 0.1- 0.4- 170428 F51 0.1- 0.4- 090527 I41 1.2- 1.0- 150110 W84 0.1+ 0.5- 170428 F51 0.0 0.2- 090527 I41 0.9- 0.3+ 150116 F51 0.7+ 0.2+ 170428 F51 0.2+ 0.3- 090527 I41 1.6- 0.1+ 150116 F51 0.6+ 0.0 170428 Q62 0.4+ 0.5- 090527 I41 1.3- 0.1- 150116 F51 0.4+ 0.2+ 170428 Q62 0.1+ 0.9- 090527 I41 1.1- 0.2+ 150116 F51 0.4+ 0.0 170518 F51 0.1+ 0.3- 090527 I41 1.4- 0.4+ 2016/ 170518 F51 0.1- 0.0 090527 I41 1.9- 0.3+ 160114 W84 1.1- 0.1- 170518 F51 0.0 0.3- 090530 691 2.0- 0.3+ 160114 W84 1.0- 0.2- 170721 Q62 0.0 0.3- 090530 691 1.9- 0.4+ 160203 F51 0.3+ 0.2+ 170721 Q62 0.2- 0.0 090530 691 2.0- 0.0 160203 F51 0.4- 0.5+ 170721 Q62 0.2+ 0.3- 090601 I41 1.3- 0.1+ 160205 F51 0.6- 0.1- 170825 W84 0.6+ 0.4- 090601 I41 2.0- 0.3+ 160205 F51 0.3- 0.3- 170825 W84 0.4+ 0.4- 090601 I41 1.3- 0.1- 160205 F51 0.4- 0.3- 2025/ 090601 I41 2.0- 0.1+ 160206 F51 0.4- 0.1+ 250326 F52 0.0 0.4- 090601 I41 1.0- 0.2+ 160206 F51 0.2+ 0.1- 250326 F52 0.2- 0.2- 090601 I41 1.7- 0.1- 160301 W84 1.1- 0.3- 250326 F52 0.1+ 0.0 090601 I41 1.5- 0.2- 160301 W84 0.7- 0.4- 090601 I41 1.4- 0.3+ 160311 F51 0.2- 0.1- ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2025 Apr. 26