Nakano Note (Nakano wa Kangaeru noda) NK 5571 350P/McNaught
The following improved orbital elements, by S. Nakano, are from 186 observations 2005 to 2026, including planetary perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas, Vesta, and non-gravitational effect of sublimating molecule = CO (or N2) using Yabushita's theory (MN 283, 347). The mean residual is +/- 0.75 arc second. Residuals for 2026 observations were -65" for Right Ascension and +32" for Declination from the prediction in NK 3598 with the delta-T correction = +0.10 day. The comet will pass 0.72 AU from Jupiter on 2047 Mar. 31 UT. See the previous orbits in NK 1977, NK 2120, NK 3290 and NK 3598. Epoch = 2026 Mar. 21.0 TT T = 2026 Mar. 17.56583 +/- 0.00489 (m.e.) TT Peri. = 140.07868 +/- 0.00072 Node = 65.29658 +/- 0.00014 (2000.0) Inc. = 7.36540 +/- 0.00002 q = 3.6943121 +/- 0.0000012 AU e = 0.0949654 +/- 0.0000008 a = 4.0819568 +/- 0.0000037 AU n' = 0.11950924 +/- 0.00000016 P = 8.247 +/- 0.0000113 years Y1 = +3.595 +/- 0.036 Y2 = -0.00073 +/- 0.00052 T = 2009 Nov. 6.60167 TT Epoch = 2009 Nov. 25.0 TT Peri. = 150.37889 e = 0.0877186 Node = 65.66531 (2000.0) a = 4.1090683 AU Inc. = 7.35446 n'= 0.11832841 q = 3.7486268 AU P = 8.329 years T = 2018 Jan. 28.97024 TT Epoch = 2018 Feb. 11.0 TT Peri. = 146.66267 e = 0.0904530 Node = 65.52039 (2000.0) a = 4.1237737 AU Inc. = 7.36329 n'= 0.11769604 q = 3.7507660 AU P = 8.374 years The predicted orbit for the 2034 return is as follows: T = 2034 July 3.47231 TT Epoch = 2034 July 17.0 TT Peri. = 141.14635 e = 0.0934889 Node = 65.23228 (2000.0) a = 4.0894602 AU Inc. = 7.35963 n'= 0.11918047 q = 3.7071409 AU P = 8.270 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2005/ 100523 204 0.2+ 0.7+ 170420 F51 0.2+ 0.8- 051101 691 0.3- 0.6+ 100524 204 0.3+ 0.7+ 170420 F51 0.1- 0.5- 051101 691 1.2- 0.4+ 100524 H06 1.2- 1.2+ 170420 F51 0.5+ 0.5- 051101 691 0.1- 0.7+ 100524 H06 1.5- 1.0+ 170420 F51 0.3+ 0.8- 051101 G96 0.4+ 0.2+ 100524 H06 (2.1- 0.5+) 2018/ 051101 G96 0.1- 0.0 100601 H10 0.8+ 0.6+ 180512 D29 0.5- 0.8+ 051101 G96 0.1- 0.1+ 100603 926 0.8+ 0.5+ 180512 D29 0.6- 0.3+ 051101 G96 0.2- 0.0 100603 926 0.2+ 0.8+ 180512 D29 0.7- 0.2- 051204 G96 0.6+ 0.2+ 100603 926 0.0 0.9+ 180519 F51 0.2- 0.0 051204 G96 0.5+ 0.2+ 100603 D96 (1.3- 2.5-) 180519 F51 0.4- 0.1- 051204 G96 0.9+ 0.0 100603 D96 (4.6- 4.4-) 180519 F51 0.1- 0.1- 051204 G96 0.3+ 0.7+ 100603 213 0.4+ 0.5+ 180519 F51 0.3- 0.1- 2009/ 100604 213 0.5+ 0.2- 180603 Q62 0.2+ 0.7+ 090228 G96 (0.9- 2.2-) 100604 213 0.2+ 0.1+ 180603 Q62 0.5+ 0.5+ 090228 G96 0.2- 2.0- 100604 367 0.7+ 0.8+ 180603 Q62 0.6+ 0.5+ 090228 G96 1.4- 1.8- 100604 367 1.4+ 0.1+ 180606 F51 0.4+ 0.4- 090228 G96 1.3+ 1.5- 100605 704 (2.4+ 0.6+) 180606 F51 0.4+ 0.3- 090325 G96 0.3+ 2.0- 100605 704 1.8+ 0.7+ 180606 F51 0.4+ 0.4- 090325 G96 0.6- 1.9- 100605 704 1.5+ 1.2+ 180606 F51 0.2+ 0.3- 090325 G96 0.7+ 1.9- 100605 704 0.8+ 1.0+ 180620 215 1.2+ 0.0 090325 G96 (0.3- 2.1-) 100605 704 (0.5+ 2.2+) 180620 215 1.2+ 0.3- 2010/ 100605 046 (2.5+ 2.0+) 180620 215 1.3+ 0.0 100512 E12 0.0 0.0 100605 046 (2.5+ 1.9+) 2025/ 100512 E12 0.4- 1.4+ 100605 046 0.1+ 0.7+ 250222 W62 1.3+ 0.6+ 100512 E12 1.2- 0.4+ 100605 046 0.5+ 0.0 250222 W62 0.9+ 0.8+ 100512 E12 0.5- 0.9+ 100606 585 0.8- 0.1+ 250223 F52 0.3- 0.8+ 100512 E12 0.9- 0.2+ 100606 585 0.7+ 1.6+ 250223 F52 0.4- 0.4+ 100512 E12 0.7- 0.1+ 100611 G96 1.1+ 0.2- 250223 F52 0.4- 0.9+ 100512 E12 0.8- 0.2+ 100611 G96 0.7+ 0.1- 250223 F52 0.6- 0.7+ 100513 E12 0.6- 0.8+ 100611 G96 0.9+ 0.3+ 250226 W62 2.0+ 0.1+ 100513 E12 0.2- 0.1+ 100611 G96 1.0+ 0.1- 250226 W62 2.0+ 0.1+ 100514 E12 0.7- 0.2+ 100611 H10 (3.7+ 0.4+) 250327 F51 0.1+ 0.4+ 100514 E12 0.8- 0.5+ 100611 H10 (3.7+ 0.1-) 250327 F51 0.3+ 0.4+ 100514 D90 0.5+ 0.7+ 100612 704 (0.1+ 3.2+) 250327 F51 0.2+ 0.8+ 100514 D90 0.1- 0.1+ 100612 704 0.8- 1.4+ 250330 F51 0.4+ 0.2+ 100514 D90 0.1- 0.3+ 100612 704 (0.1- 3.8+) 250330 F51 0.6+ 0.6+ 100514 D96 0.9- 1.4+ 100612 704 0.6+ 0.9+ 250330 F51 0.5+ 0.7+ 100514 D96 0.0 1.2+ 100612 461 0.4+ 1.0+ 250401 F52 0.5+ 0.4+ 100514 D96 1.1- 0.7+ 100612 461 1.8+ 0.7+ 250401 F52 0.7+ 0.6+ 100514 D90 0.4- 0.8+ 100618 G96 0.9+ 1.1+ 250401 F52 0.6+ 0.5+ 100514 D90 0.5- 0.7+ 100618 G96 0.8+ 0.7+ 250401 F52 0.3+ 0.3+ 100515 372 0.5- 0.1- 100618 G96 1.4+ 0.7+ 2026/ 100515 372 0.1- 0.6+ 100618 G96 1.0+ 1.0+ 260320 G96 1.0- 1.0+ 100515 372 0.6- 0.1- 100619 585 (2.6- 0.2+) 260320 G96 0.3- 0.3+ 100516 J24 1.2+ 0.2+ 100703 215 (8.5- 3.6+) 260320 G96 0.6- 0.2+ 100516 J24 1.8+ 0.7+ 100703 215 (8.1- 3.4+) 260320 G96 0.9- 0.0 100516 J24 1.9+ 0.8+ 100703 215 (7.7- 3.6+) 260407 215 0.1- 0.0 100516 J24 0.7+ 1.7+ 100704 G96 1.5+ 0.8+ 260407 215 0.3- 0.1+ 100517 H06 0.4+ 0.8+ 100704 G96 1.4+ 0.6+ 260407 215 0.3- 0.2+ 100517 H06 0.3- 1.1+ 100704 G96 (2.1+ 0.8+) 260409 G96 0.2+ 0.1+ 100517 H06 0.9- 1.1+ 100704 G96 1.5+ 0.9+ 260409 G96 0.6- 0.3+ 100517 349 0.7- 0.6- 100708 A77 (2.6- 4.8+) 260409 G96 0.0 0.1- 100517 349 1.3- 1.1- 100708 A77 (0.6+ 4.9+) 260409 G96 0.2- 0.2+ 100517 D96 0.7- 0.4+ 100708 215 (0.7- 4.6+) 260418 D29 0.4- 0.1+ 100517 D96 0.6- 0.4+ 100708 215 (0.3- 4.4+) 260418 D29 0.3- 0.2- 100518 J75 0.7- 0.1+ 100708 215 (0.2- 4.5+) 260418 D29 0.0 0.5+ 100518 J75 0.6- 0.6+ 2011/ 260419 G96 0.0 0.0 100518 J75 0.3- 0.9+ 110608 H15 (3.6- 0.3-) 260419 G96 0.2- 0.4- 100520 H10 0.8- 0.9+ 110608 H15 (4.1- 0.5+) 260419 G96 0.2- 0.0 100520 H10 0.2+ 0.6+ 110826 E07 1.1- 1.5+ 260419 G96 0.1- 0.3+ 100520 H10 0.3- 0.2- 110826 E07 0.5+ 2.0+ 260419 F52 0.5+ 0.5- 100520 H10 0.6- 0.3+ 2017/ 260419 F52 0.4+ 0.5- 100520 941 0.7- 0.7+ 170126 291 (2.1- 0.7+) 260419 F52 0.5+ 0.5- 100520 941 0.4- 0.4+ 170126 291 (2.8- 0.4+) 260419 F52 0.3+ 0.4- 100520 941 0.3- 0.3+ 170126 291 (2.2- 0.4+) 260419 F52 0.4+ 0.4- 100521 E12 0.0 0.2+ 170129 291 (2.2- 0.1+) 260419 F52 0.4+ 0.5- 100521 E12 0.0 0.7+ 170129 291 (2.9- 0.8+) 260419 F52 0.3+ 0.4- 100522 H10 0.7+ 0.2+ 170129 291 1.5- 0.1+ 260424 D29 0.1- 0.2+ 100522 H10 0.1+ 0.1+ 170304 F51 0.8- 0.6- 260424 D29 0.8- 0.8- 100522 E12 0.5+ 0.7+ 170304 F51 1.2- 0.4- 260424 D29 1.0- 0.4+ 100522 B33 0.1- 1.4+ 170304 F51 1.0- 0.8- 260508 G96 0.7+ 0.2- 100522 B33 0.9- 0.3- 170318 G96 0.1- 0.3- 260508 G96 1.0+ 0.3- 100522 B33 0.7- 0.3- 170318 G96 1.2- 0.1- 260508 G96 0.7+ 0.5- 100523 585 0.5+ 1.3+ 170318 G96 1.6- 0.5- 260508 G96 0.7+ 0.6- 100523 585 0.8+ 1.3+ 170318 G96 1.3- 0.5+ ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2026 May 14