Nakano Note (Nakano wa Kangaeru noda) NK 3227 208P/McMillan
The following improved orbital elements, by S. Nakano, are from 142 observations 2000 to 2016. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.64 arc second. The residuals of re-observations were -35" for Right Ascension and -20" for Declination from the prediction in NK 2515 (= HICQ 2015) by T. Kobayashi with the delta-T correction = +0.033 day. The comet has passed 0.18 AU from Jupiter on 2004 July 9 UT. See the previous orbits in NK 1695 and NK 2515. Epoch = 2016 June 21.0 TT T = 2016 July 1.79321 +/- 0.00012 (m.e.) TT Peri. = 310.51291 +/- 0.00015 Node = 36.41462 +/- 0.00015 (2000.0) Inc. = 4.40814 +/- 0.00003 q = 2.5446404 +/- 0.0000013 AU e = 0.3721390 +/- 0.0000003 a = 4.0528722 +/- 0.0000007 AU n' = 0.12079799 +/- 0.00000003 P = 8.159 +/- 0.0000022 years T = 2000 Dec. 8.87899 TT Epoch = 2000 Dec. 2.0 TT Peri. = 217.37348 e = 0.3507718 Node = 152.98512 (2000.0) a = 4.1475996 AU Inc. = 7.13727 n'= 0.11668334 q = 2.6927387 AU P = 8.447 years T = 2008 May 13.17210 TT Epoch = 2008 May 14.0 TT Peri. = 310.47466 e = 0.3743472 Node = 36.41627 (2000.0) a = 4.0361596 AU Inc. = 4.41512 n'= 0.12154905 q = 2.5252347 AU P = 8.109 years The predicted orbit for the 2024 return is as follows: T = 2024 Aug. 23.95723 TT Epoch = 2024 Sept. 7.0 TT Peri. = 310.69164 e = 0.3738012 Node = 36.33424 (2000.0) a = 4.0381336 AU Inc. = 4.41250 n'= 0.12145993 q = 2.5286745 AU P = 8.115 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2000/ 081026 104 0.1+ 0.1- 081119 900 0.1+ 0.2- 000923 699 1.3+ 0.8+ 081026 104 0.5- 0.0 081119 900 0.9+ 0.4- 000923 699 1.5- 0.9- 081026 473 0.0 0.1- 081119 130 (2.2+ 0.5+) 000923 699 0.1+ 0.8+ 081027 372 0.0 1.4+ 081119 130 1.8+ 0.7+ 000923 699 0.2+ 1.0- 081027 372 1.0- 0.1- 081125 372 1.2+ 1.3- 001002 699 0.0 0.3+ 081027 372 1.0- 0.5+ 081125 372 0.0 0.6+ 001002 699 (1.7+ 2.6+) 081027 349 0.5- 0.3+ 081127 E85 0.5+ 0.4- 001002 699 1.0- 0.2+ 081027 349 0.4- 0.2+ 081127 E85 0.8+ 1.0+ 001002 699 0.9+ 0.1+ 081027 349 0.9- 0.2- 081127 E85 0.4+ 0.1- 2008/ 081030 703 0.2+ 0.9- 081128 349 0.9+ 0.3+ 080920 691 0.5- 0.1- 081030 703 0.7- 0.4- 081128 349 0.3+ 0.6+ 080920 691 1.8- 0.7- 081030 703 0.8- 0.4- 081128 J79 1.7+ 0.1+ 080920 691 1.0- 0.3- 081030 850 0.2- 0.2+ 081204 G96 0.1- 0.7- 081006 691 (2.3- 0.5-) 081030 850 0.9- 0.1+ 081204 G96 1.4+ 0.1+ 081006 691 1.6- 0.9- 081030 850 1.5- 0.4+ 081204 G96 0.8+ 0.3- 081006 691 1.2- 0.1- 081101 704 0.1+ 0.6+ 081204 G96 0.8+ 0.1+ 081010 691 1.7- 0.3- 081101 704 0.3- 1.2+ 081219 204 (0.5- 2.1+) 081010 691 1.2- 0.1- 081101 704 0.5- 1.5+ 081221 104 0.2- 1.2- 081010 691 1.0- 0.2- 081101 704 0.8+ 1.4+ 081221 104 0.4- 0.9- 081019 291 0.8- 0.2+ 081101 704 0.7- 1.3+ 081221 104 0.4+ 0.6- 081019 291 0.9- 0.3+ 081102 B49 (0.1- 2.2-) 081223 349 1.6+ 0.7+ 081019 291 1.2- 0.5+ 081104 850 0.3- 0.4- 081223 349 1.3+ 0.5+ 081020 G96 0.2+ 0.1- 081104 850 0.1+ 0.0 081231 G96 1.0+ 0.3+ 081020 G96 0.4+ 0.1- 081104 850 0.3- 0.2- 081231 G96 0.6+ 0.2- 081020 G96 0.4+ 0.1+ 081107 204 0.3+ 0.1+ 081231 G96 0.8+ 0.1- 081020 G96 0.2+ 0.1- 081108 204 0.3+ 0.0 081231 G96 0.4+ 0.0 081021 691 1.3- 0.2- 081108 691 0.1+ 0.4+ 2009/ 081021 691 1.6- 0.8- 081108 691 0.8- 0.2+ 090101 G96 0.7+ 0.2- 081021 691 1.4- 0.0 081108 691 0.0 0.3+ 090101 G96 1.1+ 0.1- 081025 215 0.4- 0.2+ 081113 473 0.7+ 0.2- 090101 G96 0.4+ 0.3+ 081025 215 0.2+ 0.1- 081114 473 0.8- 0.0 090101 G96 1.3+ 0.1- 081025 215 0.1+ 0.2- 081114 473 0.8- 0.0 090101 204 0.6+ 0.5+ 081025 B49 0.5- 0.1+ 081114 J47 0.1+ 0.8- 090101 204 1.4+ 0.4- 081025 213 0.1+ 0.7- 081116 104 1.2+ 1.3+ 090120 A77 0.4- 0.4+ 081025 B49 1.1- 0.6+ 081116 104 1.6+ 0.6+ 090120 A77 (2.5- 1.9-) 081025 213 0.4+ 0.5- 081116 104 0.2+ 0.9+ 090120 A77 1.1- 0.2- 081025 473 0.2- 0.0 081118 H45 0.4- 0.4- 090130 204 0.9+ 0.8+ 081025 473 0.2- 0.0 081118 H45 0.3+ 0.5- 2016/ 081025 B37 0.1+ 0.4+ 081118 H45 0.1+ 0.3+ 160729 W96 0.3- 0.4- 081025 B37 0.5+ 0.6+ 081118 H45 0.2+ 0.2+ 160729 W96 0.1+ 0.6- 081026 B37 1.0+ 0.2+ 081118 H45 0.7+ 0.6- 160729 W96 1.1+ 1.9- 081026 204 0.1+ 0.1+ 081118 585 (4.2+ 2.1-) 160731 W96 (2.0- 0.5-) 081026 204 0.1+ 0.1+ 081118 585 (2.5+ 2.1-) 160731 W96 1.0- 0.3- 081026 673 0.2+ 0.4+ 081118 585 0.8+ 1.9- 160731 W96 0.6- 0.2- 081026 704 0.5+ 0.5+ 081118 585 (0.2- 2.3-) 160801 C10 0.3+ 0.5- 081026 673 0.0 0.2+ 081118 585 (1.4+ 2.2-) 160801 C10 0.5- 0.2+ 081026 704 0.1+ 0.7+ 081119 850 1.4+ 0.2- 160801 C10 0.4+ 1.7+ 081026 673 0.2- 0.2+ 081119 850 0.8+ 0.1+ 160802 F51 0.1+ 0.1- 081026 673 0.5- 0.1+ 081119 704 0.8+ 0.8- 160802 F51 0.1+ 0.1- 081026 704 0.4+ 0.7+ 081119 850 0.2+ 0.3- 160802 F51 0.0 0.0 081026 704 0.1- 0.5- 081119 704 0.1- 0.0 160802 F51 0.0 0.0 081026 704 0.7+ 0.4+ 081119 704 0.9- 0.0 081026 104 0.6- 0.6+ 081119 704 0.7- 1.6- ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2016 Sept. 1