Nakano Note (Nakano wa Kangaeru noda) NK 5434 414P/STEREO
The following improved orbital elements, by S. Nakano, are from 219 observations 2016 to 2025, 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 +/- 2.04 arc seconds. Residuals on 2025 August were +40" for Right Ascension and -39" for Declination from the prediction in NK 5030 (= CH 2025) with the redta-T correction = -0.012 day. The comet will pass 0.88 AU and 0.83 AU from Jupiter on 2031 Dec. 6 and 2055 Aug. 23 UT, respectively. See the previous orbits in NK 4366 (= CBET 4911) and NK 5030. Epoch = 2025 Oct. 12.0 TT T = 2025 Sept.26.31397 +/- 0.00016 (m.e.) TT Peri. = 210.70711 +/- 0.00064 Node = 257.81679 +/- 0.00013 (2000.0) Inc. = 23.40616 +/- 0.00016 q = 0.5241534 +/- 0.0000012 AU e = 0.8122839 +/- 0.0000045 a = 2.7922662 +/- 0.0000240 AU n' = 0.21123645 +/- 0.00000272 P = 4.666 +/- 0.0000602 years A1 = +0.326 +/- 0.122 A2 = -0.00400 +/- 0.00005 T = 2016 May 23.17220 TT Epoch = 2016 May 12.0 TT Peri. = 210.65818 e = 0.8103705 Node = 257.84516 (2000.0) a = 2.7990610 AU Inc. = 23.38931 n'= 0.21046774 q = 0.5307845 AU P = 4.683 years T = 2021 Jan. 25.38606 TT Epoch = 2021 Jan. 26.0 TT Peri. = 210.73496 e = 0.8116764 Node = 257.79069 (2000.0) a = 2.7950206 AU Inc. = 23.38312 n'= 0.21092427 q = 0.5263685 AU P = 4.673 years The predicted orbit for the 2030 return is as follows: T = 2030 May 28.84782 TT Epoch = 2030 May 19.0 TT Peri. = 210.76565 e = 0.8116903 Node = 257.75616 (2000.0) a = 2.7945202 AU Inc. = 23.36458 n'= 0.21098093 q = 0.5262353 AU P = 4.672 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2016/ 160512 C49 3.1- 2.5+ 210110 204 0.1+ 0.0 160511 C49 (2.7- 7.9-) 160512 C49 2.9- 0.5- 210110 204 0.1- 0.2- 160511 C49(11.3+ 3.2-) 160512 C49 2.8- 2.4- 210110 204 0.1+ 0.0 160511 C49 2.5+ 1.5- 160512 C49 1.2+ 2.3- 210110 204 0.0 0.4- 160511 C49 (8.1- 0.3+) 160512 C49 2.1+ 3.8- 210111 A71 0.1+ 0.5+ 160511 C49 (4.1+ 13.3+) 160512 C49 (9.1- 1.9+) 210111 A71 1.2+ 0.0 160511 C49 (9.0+ 1.4+) 160512 C49 2.6+ 1.7+ 210111 A71 0.4- 1.0- 160511 C49 6.3+ 3.9- 160512 C49 0.0 3.7- 210111 A77 0.8+ 0.6- 160511 C49 2.7+ 2.5- 160513 C49 (6.7+ 7.2+) 210111 A77 1.1+ 1.1- 160511 C49 1.5+ 1.0- 160513 C49 (8.3- 6.4+) 210111 A77 0.9+ 1.5- 160511 C49 (8.9- 9.3+) 160513 C49 1.6+ 1.8- 210111 Z10 0.4+ 0.3+ 160511 C49 0.8- 1.1+ 160513 C49 1.3+ 1.2+ 210111 Z10 0.8+ 0.4+ 160511 C49 (8.0- 10.1-) 160513 C49 1.4+ 4.2- 210113 H06 0.7- 0.8- 160511 C49 2.5- 3.8+ 160513 C49 4.2+ 0.9- 210113 349 0.4+ 0.6+ 160511 C49 6.0- 1.1- 160513 C49 0.4- 5.1- 210113 349 0.3+ 0.5+ 160511 C49 2.8- 0.6+ 160513 C49 3.2+ 3.2- 210114 247 0.5+ 0.5+ 160511 C49 2.5+ 1.9- 160513 C49 (7.3+ 5.9+) 210114 247 0.3+ 0.2- 160511 C49 2.6+ 3.8- 160513 C49 1.4+ 0.3+ 210114 247 0.5+ 0.4+ 160511 C49 5.1+ 1.7- 160513 C49 (8.2- 4.4-) 210114 A77 1.0+ 0.0 160511 C49 5.8+ 0.9+ 160513 C49 0.8- 5.1- 210114 A77 1.4+ 0.2- 160511 C49 (3.8- 7.6-) 160513 C49(19.2+ 8.9+) 210114 A77 0.5+ 0.5- 160511 C49 (8.4+ 3.9+) 160513 C49 (2.4+ 22.0+) 210115 C53 (1.6- 5.0-) 160511 C49(14.7+ 0.0 ) 160513 C49 (5.0+ 15.3+) 210115 C53 (1.0- 4.7-) 160511 C49 3.7+ 3.9- 160513 C49 (6.9- 13.5+) 210115 C53 (0.9- 5.5-) 160511 C49 1.8+ 4.0- 160513 C49 (3.8+ 7.0+) 210116 A77 1.2+ 0.9- 160511 C49 5.1- 4.5- 160513 C49 (6.8+ 16.5+) 210116 A77 1.7+ 1.3- 160511 C49 3.5+ 3.2+ 160513 C49(19.8+ 40.3+) 210116 A77 1.8+ 1.2- 160511 C49 2.9- 0.6- 160513 C49 (4.9- 14.5+) 210116 G40 0.4- 0.2- 160511 C49 4.1- 2.9- 160513 C49 (5.7- 11.0+) 210116 G40 1.3+ 0.1- 160511 C49 (9.7- 3.2+) 160513 C49 (0.5- 14.8+) 210117 C53 0.5+ 1.7- 160511 C49 4.0- 1.7+ 160513 C49(13.8+ 2.4+) 210117 C53 (1.0+ 2.2-) 160511 C49 2.1+ 2.7- 160513 C49(10.7+ 19.3+) 210117 C53 (2.2+ 3.3-) 160512 C49 1.3- 1.4- 160513 C49 (2.9+ 11.5-) 210117 G40 0.3+ 0.3- 160512 C49 0.2- 2.5+ 160513 C49(11.9- 2.6-) 210117 G40 1.5+ 0.1+ 160512 C49 2.6+ 2.9+ 160513 C49 4.7- 4.7+ 210118 349 1.3+ 0.5+ 160512 C49 2.6+ 2.9+ 160513 C49 (8.6- 16.7+) 210118 349 1.2+ 0.8+ 160512 C49 3.9+ 4.9- 160513 C49 (5.7- 24.8-) 210118 349 0.7+ 1.0+ 160512 C49 1.9+ 3.5- 160513 C49 (3.2- 10.6+) 210118 A77 (3.0+ 0.6+) 160512 C49 0.7+ 3.1- 160513 C49(17.8- 2.8-) 210118 A77 (3.6+ 0.5+) 160512 C49 3.5+ 3.1- 160513 C49 5.9+ 1.7+ 210118 A77 (0.7+ 3.7-) 160512 C49 (1.5- 11.4+) 160513 C49 6.0- 2.8+ 210119 A77 (2.2+ 0.2+) 160512 C49 1.9- 0.3+ 160513 C49(18.1- 13.4+) 210119 A77 1.7+ 0.0 160512 C49 1.1+ 0.2- 2020/ 210119 A77 (2.3+ 1.8-) 160512 C49 4.4- 3.7+ 201219 G96 1.4- 0.7+ 210323 W84 0.3+ 0.0 160512 C49 1.1+ 2.9+ 201219 G96 1.4- 0.4- 210323 W84 0.4+ 0.1- 160512 C49 1.3+ 3.3+ 201219 G96 1.6- 0.0 210325 C51 0.3+ 0.3+ 160512 C49 1.6+ 2.1- 2021/ 210325 C51 0.3+ 0.4+ 160512 C49 6.3- 3.6+ 210104 I41 0.5- 0.2+ 210325 C51 0.6+ 0.2+ 160512 C49 1.6- 3.0+ 210104 I41 1.0- 0.1- 210325 C51 0.4+ 0.4+ 160512 C49 1.4- 0.8+ 210104 I41 1.0- 0.1+ 210325 C51 1.3- 0.2+ 160512 C49 1.7- 1.1+ 210104 I41 0.8- 0.1- 210325 C51 0.1+ 0.5+ 160512 C49 1.9+ 4.0+ 210105 I41 0.4- 0.5- 210325 C51 0.2+ 0.3+ 160512 C49 0.3+ 1.1- 210105 I41 0.5- 0.4- 2025/ 160512 C49 4.0+ 0.1+ 210105 I41 0.2- 0.3- 250728 Z84 0.3- 1.0+ 160512 C49 (9.5+ 1.5+) 210105 I41 0.8- 0.9- 250728 Z84 1.5- 0.5+ 160512 C49 (9.6+ 4.5-) 210107 K88 0.8+ 0.9+ 250729 Z84 0.4- 0.2+ 160512 C49 0.2- 1.7+ 210107 K88 0.9- 0.0 250826 215 1.2- 1.7+ 160512 C49 (7.0- 0.3-) 210107 K88 0.1+ 0.3- 250826 215 0.9- 1.4+ 160512 C49 0.8- 6.2+ 210107 A71 1.0- 0.1- 250826 215 (0.1+ 2.2+) 160512 C49 0.5+ 0.9+ 210107 A71 0.7- 0.1- 250827 A71 (2.3+ 3.6+) 160512 C49 2.3- 0.7+ 210108 H06 0.6- 0.7- 250827 A71 (2.6- 1.6+) 160512 C49 3.8- 0.7+ 210108 H06 0.4+ 0.4- 250827 A71 (0.5- 2.0+) 160512 C49 2.7- 3.7+ 210108 K88 0.3- 0.4- 250829 A77 1.4- 0.7- 160512 C49 2.6+ 0.6+ 210108 K88 0.4- 0.5- 250829 A77 1.3- 0.3- 160512 C49 0.8- 2.6+ 210108 G06 (0.8- 2.0-) 250829 A77 0.0 0.9- 160512 C49 4.5- 1.6- 210108 G06 0.6- 0.5- 250830 A77 0.5- 0.6- 160512 C49 4.2- 1.1- 210108 204 0.3+ 0.4+ 250830 A77 0.5- 1.6- 160512 C49 3.9- 1.2- 210108 204 0.3+ 0.0 250830 A77 (0.2- 2.7-) 160512 C49 1.7+ 5.3+ 210108 204 0.4+ 0.5+ 250830 P87 1.0+ 0.3- 160512 C49 (3.2+ 7.3+) 210109 V37 0.2- 0.1- 250830 P87 0.4- 1.3+ 160512 C49 1.4+ 3.1+ 210109 V37 0.4- 0.2+ 250831 W62 0.9- 0.5+ 160512 C49 3.2- 2.3- 210109 V37 0.1+ 0.1+ 250831 W62 0.6- 0.0 160512 C49 1.3+ 6.3+ 210109 V37 0.1+ 0.2+ 250831 W62 0.3- 0.0 160512 C49 2.8- 3.9+ 210109 H06 0.5- 0.8- 250901 G00 (0.4+ 3.0+) 160512 C49 5.2+ 4.2+ 210109 H06 0.8- 0.4- 250901 G00 0.0 1.0+ 160512 C49 (4.9- 8.5+) 210109 H06 0.0 0.3- 250901 G00 0.2- 0.2+ 160512 C49 0.4+ 5.3+ 210109 Q11 0.1- 0.1- 250901 G00 0.7- 0.6- 160512 C49 6.0- 1.0+ 210109 349 0.4- 0.3- 250901 903 1.2- 0.2- 160512 C49 0.8+ 2.4- 210109 Q11 0.1- 0.3- 250901 903 1.0- 0.7+ 160512 C49 (6.7- 7.4+) 210109 349 0.7- 0.3- 250901 903 0.4- 0.8+ 160512 C49 0.3- 5.6- 210109 Q11 0.1- 0.0 250902 A77 0.3+ 1.6+ 160512 C49 2.4+ 1.5- 210109 349 0.3- 0.1- 250902 A77 1.2+ 0.4- 160512 C49 5.9- 0.1- 210109 349 0.5- 0.4+ 250902 A77 (2.1- 0.6+) 160512 C49 (1.8- 8.9-) 210109 349 0.8- 0.1- 250903 G40 0.4- 0.2+ 160512 C49 3.4+ 5.1+ 210110 349 0.6- 0.3+ 250903 G40 0.7+ 0.6- 160512 C49 (9.6- 2.2-) 210110 349 0.4- 0.0 250903 P87 0.8+ 0.8- 160512 C49 (0.3+ 7.5+) 210110 349 0.3- 0.0 250903 P87 0.9- 1.0+ 160512 C49 5.0- 0.3- 210110 349 0.4- 0.2- 250903 P87 0.8- 0.2- 160512 C49 4.1- 0.6+ 210110 349 0.8- 0.3- 250907 349 0.9+ 0.1- 160512 C49 1.4- 2.4- 210110 A71 0.0 0.1+ 250907 349 1.5+ 0.5- 160512 C49 2.2+ 6.0+ 210110 A71 0.3+ 0.1+ 250907 349 1.0+ 0.8- 160512 C49 3.9- 3.5- 210110 A71 0.4+ 0.4- 250907 349 1.3+ 0.5- 160512 C49 (5.0- 9.0+) 210110 A71 0.3+ 0.2- 250914 P87 0.4- 0.8- 160512 C49 1.0+ 4.1+ 210110 A71 0.1+ 0.2- 250914 P87 0.3- 0.5- 160512 C49 0.6+ 1.8- 210110 A71 0.2+ 0.1- 250914 P87 0.2- 1.2- 160512 C49 4.8+ 3.3+ 210110 204 0.9+ 0.5- ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2025 Sept. 16