Nakano Note (Nakano wa Kangaeru noda) NK 5604 P/Leonard (2018 VN2 = 2010 W10 = 2026 M2)
The following improved orbital elements, by S. Nakano, are from 148 observations 2010 to 2026, including planetary perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas, Vesta, and non-gravitational effect of style II. The mean residual is +/- 0.54 arc second. Residuals for Recovery observations were +214" for Right Ascension and +24" for Declination from the prediction in NK 4475 (HICQ 2026) with the delta-T correction = -0.17 day. The comet has made three appearances. See the previous orbits in HICQ 2019 and NK 4475. Epoch = 2026 Aug. 28.0 TT T = 2026 Aug. 15.68620 +/- 0.00164 (m.e.) TT Peri. = 138.93238 +/- 0.00063 Node = 226.42618 +/- 0.00004 (2000.0) Inc. = 18.25554 +/- 0.00002 q = 2.1195567 +/- 0.0000030 AU e = 0.4778879 +/- 0.0000003 a = 4.0595818 +/- 0.0000060 AU n' = 0.12049863 +/- 0.00000027 P = 8.179 +/- 0.0000183 years A1 = +0.498 +/- 0.317 A2 = +0.03727 +/- 0.00339 T = 2010 Apr. 3.85907 TT Epoch = 2010 Mar. 25.0 TT Peri. = 138.80301 e = 0.4788856 Node = 226.52713 (2000.0) a = 4.0582361 AU Inc. = 18.24249 n'= 0.12055858 q = 2.1148054 AU P = 8.175 years T = 2018 June 5.37915 TT Epoch = 2018 June 11.0 TT Peri. = 138.77536 e = 0.4775214 Node = 226.54876 (2000.0) a = 4.0626011 AU Inc. = 18.24045 n'= 0.12036433 q = 2.1226219 AU P = 8.189 years The predicted orbit for the 2034 return is as follows: T = 2034 Oct. 17.93095 TT Epoch = 2034 Oct. 5.0 TT Peri. = 138.96138 e = 0.4774348 Node = 226.34701 (2000.0) a = 4.0654499 AU Inc. = 18.26478 n'= 0.12023784 q = 2.1244627 AU P = 8.197 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2010/ 181105 K88 0.2- 0.0 181118 G96 0.9- 0.4+ 101127 F51 0.3+ 0.2- 181105 K88 0.5- 0.3+ 181119 U69 0.9+ 0.2+ 101127 F51 0.0 0.1+ 181105 K88 0.4- 0.6+ 181119 U69 0.6+ 0.2+ 101205 F51 0.1- 0.3- 181106 I52 0.5+ 0.7+ 181127 691 0.4- 0.8+ 101205 F51 0.2- 0.1+ 181106 I52 0.0 0.4- 181127 691 0.7- 0.5+ 2017/ 181106 I52 0.0 0.6- 181127 691 1.0- 0.0 170623 F51 0.2+ 0.1- 181106 G96 0.4+ 0.2+ 181130 Q62 0.2- 0.3- 170623 F51 0.0 0.3- 181106 G96 0.2- 0.2+ 181130 Q62 0.7- 0.1+ 170623 F51 0.3- 0.1+ 181106 G96 0.1- 0.1+ 181130 Q62 0.9- 0.4+ 170623 F51 0.2+ 0.1- 181106 G96 1.0- 0.3+ 181210 D74 1.4- 0.6+ 2018/ 181106 F52 0.0 0.2- 181210 D74 0.4+ 0.8+ 180702 I41 0.2- 0.6+ 181106 F52 0.0 0.2- 181210 D74 0.5- 0.7+ 180702 I41 1.5+ 0.7+ 181106 F52 0.0 0.1- 181213 G96 0.1+ 0.1- 180724 I41 0.0 0.1- 181106 F52 0.1+ 0.2- 181213 G96 0.7+ 0.1- 180724 I41 0.3- 0.2+ 181106 P93 0.0 0.3- 181213 G96 0.2+ 0.1+ 180810 I41 0.5- 0.1- 181106 P93 1.9+ 0.2- 181213 G96 0.4- 1.2- 180810 I41 0.5+ 0.1- 181106 P93 1.7+ 0.4- 181213 F51 0.3+ 0.0 180810 I41 0.7- 0.0 181106 K88 0.1+ 0.3+ 181213 F51 0.2+ 0.0 180810 I41 0.0 0.2- 181106 K88 0.9- 0.2+ 181213 F51 0.1+ 0.1+ 180818 I41 0.4- 0.2+ 181106 K88 0.7- 0.5+ 181213 F51 0.2+ 0.0 180818 I41 0.5- 0.1- 181106 K88 0.4- 0.3+ 2019/ 180827 I41 0.2- 0.4- 181107 I52 0.6- 0.6- 190106 F51 0.2+ 0.0 180827 I41 0.4- 0.2- 181107 I52 0.8- 1.8- 190106 F51 0.3+ 0.1+ 180907 I41 0.2+ 0.1+ 181107 I52 0.2+ 0.8+ 190106 F51 0.2+ 0.3+ 180907 I41 0.2+ 0.3+ 181107 I52 0.9- 1.3- 190106 F51 0.4+ 0.3+ 180909 G96 (2.2- 0.2+) 181107 K88 0.2- 0.1- 190110 F51 0.2- 0.1- 180909 G96 1.5- 0.2- 181107 K88 0.2+ 0.6- 190110 F51 0.2+ 0.0 180909 703 (7.2- 1.9+) 181109 G96 0.2- 0.1- 190110 F51 0.0 0.3+ 180909 G96 1.3- 0.2- 181109 G96 0.4- 0.0 190110 F51 0.1+ 0.0 180909 G96 0.2- 0.1- 181109 G96 0.3+ 0.4- 2026/ 180909 703 (2.6- 0.5-) 181109 G96 0.0 0.9- 260622 L27 0.0 0.2+ 180909 703 (2.0- 0.1-) 181111 703 (2.5- 0.8-) 260622 L27 0.5- 0.1- 180913 I41 0.4+ 0.4- 181111 703 1.9- 1.5- 260622 L27 0.3+ 0.0 180913 I41 0.1+ 0.0 181111 703 1.2- 0.7- 260623 C10 0.6+ 0.1+ 180926 I41 0.5+ 0.3- 181111 703 0.4- 1.0+ 260623 C10 0.7- 0.4- 180926 I41 0.1+ 0.5- 181113 F52 0.1- 0.1- 260623 C10 1.2- 0.2+ 181006 I41 0.7+ 0.7- 181113 F52 0.1- 0.1- 260624 950 0.1- 1.0- 181006 I41 0.2+ 0.3- 181113 F52 0.1+ 0.2- 260624 950 0.3+ 0.5- 181031 I41 0.7+ 0.3- 181115 K88 0.2+ 0.2+ 260624 W62 0.1+ 0.3+ 181031 I41 0.3+ 0.7- 181115 K88 0.3+ 0.4+ 260624 W62 0.2+ 0.2+ 181102 I41 0.1+ 0.4- 181116 K88 0.0 0.2+ 260624 W62 0.0 0.2+ 181102 I41 0.2- 0.3- 181116 K88 0.4- 0.6+ 260624 Q62 0.1+ 0.2- 181103 I41 0.0 0.3+ 181117 703 1.0- 1.0+ 260624 Q62 0.2- 0.0 181103 I41 0.2+ 0.4- 181117 703 (2.3- 0.6+) 260626 215 1.0- 0.5- 181105 G96 1.3- 0.3- 181117 703 1.3- 1.0+ 260626 215 0.2+ 0.6+ 181105 G96 0.7- 0.4- 181117 703 1.8- 0.8+ 260626 215 0.9+ 0.1+ 181105 G96 0.1+ 0.1- 181117 G96 0.5- 0.1- 260626 A77 0.2- 0.3+ 181105 G96 0.6+ 0.1+ 181117 G96 0.0 0.2+ 260626 L27 (2.4- 0.1-) 181105 I52 0.8- 0.3+ 181117 G96 1.1- 0.5- 260626 L27 1.6- 0.1- 181105 I52 0.5- 0.1- 181117 G96 0.3+ 0.4- 260626 A77 0.4- 0.2+ 181105 I52 0.5+ 0.1+ 181117 K88 0.4+ 0.2- 260626 L27 (3.6- 0.4-) 181105 I52 0.3- 0.9+ 181117 K88 0.8- 0.5- 260627 L27 0.5- 0.1+ 181105 I52 0.5- 0.1+ 181118 G96 0.1- 0.2+ 260627 L27 0.4- 0.2+ 181105 I52 (3.0- 0.3-) 181118 G96 0.8- 0.1+ 181105 I52 (4.6- 0.4+) 181118 G96 1.0- 0.4+ ( ) -------- Rejected Obs.
Associate of the CBAT Late edition Syuichi Nakano 2026 June 30