Nakano Note (Nakano wa Kangaeru noda) NK 5165 280P/Larsen
The following improved orbital elements, by S. Nakano, are from 173 observations 2004 to 2023, 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 +/- 0.68 arc second. Residuals for 2023 observations were -45" for Right Ascension and +16" for Declination from the prediction in NK 4275 with the delta-T correction = +0.034 day. But not sure whether 2023 observations are correct or not. See the previous orbits in NK 1232, NK 2409 and NK 4275. Epoch = 2023 Aug. 4.0 TT T = 2023 Aug. 4.67281 +/- 0.01220 (m.e.) TT Peri. = 104.72450 +/- 0.00308 Node = 131.38276 +/- 0.00011 (2000.0) Inc. = 11.77208 +/- 0.00002 q = 2.6402015 +/- 0.0000045 AU e = 0.4171194 +/- 0.0000013 a = 4.5295753 +/- 0.0000028 AU n' = 0.10223929 +/- 0.00000009 P = 9.640 +/- 0.0000089 years A1 = -0.553 +/- 5.828 A2 = +0.58482 +/- 0.02290 T = 2004 May 10.90611 TT Epoch = 2004 Apr. 25.0 TT Peri. = 104.54273 e = 0.4187238 Node = 131.55435 (2000.0) a = 4.5024509 AU Inc. = 11.78632 n'= 0.10316458 q = 2.6171677 AU P = 9.554 years T = 2013 Dec. 10.97049 TT Epoch = 2013 Dec. 14.0 TT Peri. = 104.58311 e = 0.4174910 Node = 131.50938 (2000.0) a = 4.5252498 AU Inc. = 11.77243 n'= 0.10238592 q = 2.6359987 AU P = 9.626 years The predicted orbit for the 2033 return is as follows: T = 2033 Mar. 12.69298 TT Epoch = 2033 Mar. 24.0 TT Peri. = 104.93007 e = 0.4196517 Node = 131.22748 (2000.0) a = 4.5037254 AU Inc. = 11.79199 n'= 0.10312079 q = 2.6137294 AU P = 9.558 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2004/ 040621 246 (2.1+ 0.1-) 130401 C23 0.2- 0.3- 040419 691 0.2- 0.0 040622 691 0.8+ 0.3- 130407 D88 0.6- 0.6- 040419 691 0.6- 0.6+ 040622 691 0.4+ 0.2+ 130407 D88 0.2- 1.2- 040419 691 0.2- 0.2- 040622 691 0.1+ 0.6+ 130410 G96 0.2+ 0.6- 040420 291 0.5+ 0.6+ 040709 213 0.1+ 0.3- 130410 G96 0.2+ 1.3- 040420 291 0.9+ 1.0- 040709 213 0.2+ 0.3- 130410 G96 0.1+ 0.8- 040420 291 1.2- 1.9- 040709 213 0.1- 0.0 130410 G96 0.5+ 0.5- 040420 176 0.7- 0.5+ 2013/ 130410 A24 0.4+ 0.6+ 040420 176 0.5- 0.4+ 130205 291 0.0 0.6+ 130410 A24 (0.4+ 2.5+) 040420 176 0.1- 0.2+ 130205 291 0.1+ 0.6+ 130414 I41 0.0 0.1+ 040421 113 1.7- 0.6+ 130205 291 0.1+ 0.5+ 130414 I41 0.2+ 0.5- 040421 113 1.4- 0.5+ 130206 291 0.1- 0.5+ 130414 I41 0.4+ 0.3- 040421 113 1.2- 0.7+ 130206 291 0.1- 0.6+ 130414 C10 0.7+ 1.0- 040421 854 (2.8- 0.6+) 130206 291 0.1- 0.4+ 130414 C10 0.3- 0.3- 040421 854 0.2- 0.3+ 130207 H06 0.2+ 0.5+ 130416 585 0.2- 0.1- 040421 H36 2.0- 0.1- 130207 H06 0.4- 0.5+ 130416 585 1.1- 0.1+ 040421 673 0.2+ 0.0 130214 J04 0.3- 0.7+ 130416 585 1.4- 0.0 040421 H36 0.2- 0.1+ 130214 J04 0.0 1.1+ 130416 585 0.2+ 0.1- 040421 673 0.3+ 0.2+ 130214 J04 0.1+ 0.6+ 130416 585 0.6- 0.1- 040421 711 0.1+ 0.2+ 130214 J04 0.5+ 0.6+ 130416 585 0.5+ 0.2- 040421 673 0.5+ 0.3+ 130302 703 0.7- 0.4- 130416 585 1.6- 0.2- 040421 673 0.7+ 0.5+ 130302 703 1.6- 0.4+ 130416 585 0.7+ 0.3- 040421 H36 0.1+ 0.5- 130302 703 0.9- 1.5+ 130418 I41 0.2+ 0.1- 040421 711 0.1- 0.5+ 130302 703 (1.2- 2.1+) 130418 I41 0.0 0.2- 040421 673 0.2+ 0.7+ 130302 349 0.1+ 0.3+ 130418 I41 0.3+ 0.4- 040421 673 0.3+ 0.6+ 130302 349 0.6- 1.0+ 130419 I41 0.2+ 0.1- 040423 360 0.5- 1.5- 130304 C10 0.5- 0.4+ 130419 I41 0.3+ 0.1+ 040423 360 1.1- 1.2- 130304 C10 0.7- 0.6+ 130419 I41 0.1+ 0.3- 040423 360 (2.2- 0.6-) 130304 C10 0.6- 0.3+ 130420 I41 0.5- 0.1+ 040424 170 1.1- 0.1+ 130305 130 1.1- 0.2+ 130420 I41 0.2- 0.1- 040424 170 0.9- 0.2+ 130305 130 0.6- 0.5+ 130420 I41 0.5+ 0.1- 040424 170 0.0 1.0- 130305 130 0.2- 0.2- 130430 C32 0.4+ 0.2+ 040425 372 1.6- 1.9- 130305 130 0.3- 0.1- 130430 C32 0.0 0.3+ 040428 360 0.5- 0.1- 130310 511 0.0 0.4+ 130504 212 (3.3- 8.5-) 040428 360 1.2- 0.2+ 130310 511 0.2- 0.4+ 130504 212 (3.8- 8.9-) 040430 118 0.3- 0.4- 130310 511 0.1- 0.5+ 130504 212 (4.1- 7.9-) 040430 118 1.3+ 0.8+ 130311 511 0.2- 0.3+ 130527 A32 (0.6+ 2.1-) 040514 699 (2.0- 2.7+) 130311 511 0.1- 0.4+ 130527 A32 0.1+ 1.3- 040514 699 0.8- 0.6- 130313 C23 0.0 0.7- 130527 A32 0.5- 0.7- 040514 699 0.3- 0.3- 130313 C23 0.4- 0.1- 130531 703 0.4+ 1.0- 040514 699 1.2- 0.2- 130313 C23 0.4- 0.2- 130531 703 1.8+ 0.2+ 040514 360 0.4+ 0.1- 130313 G45 0.1- 0.4+ 130531 703 0.5- 1.3- 040514 360 0.1- 0.1- 130313 G45 0.1- 0.1+ 130531 703 0.3+ 2.0- 040514 360 0.3+ 0.8- 130313 G45 0.0 0.3+ 130611 703 0.1- 0.2+ 040517 215 0.3+ 1.2- 130313 G45 0.3+ 0.4+ 130611 703 (2.4+ 0.5+) 040522 703 0.4+ 0.4- 130313 G45 0.1+ 0.2- 130611 703 0.4+ 0.9+ 040522 703 1.0+ 0.5- 130314 703 0.3- 0.3+ 130621 703 0.7- 0.3+ 040522 703 1.1- 1.5+ 130314 703 (2.1+ 0.3+) 130621 703 0.6+ 0.7+ 040522 703 (2.9- 1.7+) 130314 703 0.7- 0.2+ 130621 703 0.2- 0.2+ 040524 704 0.7+ 0.0 130314 703 0.2+ 0.1+ 130621 703 0.1+ 1.5+ 040524 704 (2.0+ 0.4-) 130314 703 0.0 0.2+ 130711 W96 1.0+ 0.3- 040524 704 0.0 0.0 130316 215 0.1+ 0.2+ 130711 W96 0.2+ 0.2+ 040524 704 0.7+ 0.1+ 130316 215 0.0 0.1+ 2014/ 040524 704 0.1+ 0.2+ 130316 215 0.1+ 0.0 140621 Q62 0.3+ 0.3+ 040524 360 1.1+ 0.1- 130319 561 0.8+ 0.2- 140621 Q62 0.2+ 0.6+ 040524 360 0.4+ 0.2- 130319 561 1.1+ 0.4- 140621 Q62 0.4- 1.1+ 040524 360 0.9+ 0.2- 130319 561 0.9+ 0.9- 2023/ 040605 170 0.9+ 0.9+ 130320 561 1.2+ 0.5- 230327 F51 0.2- 2.3+ 040605 170 0.4+ 0.7+ 130320 561 1.3+ 0.6- 230327 F51 0.2- 2.2+ 040613 360 0.8+ 0.5+ 130321 C23 0.6+ 1.4- 230327 F51 0.3- 2.5+ 040613 360 0.6+ 0.1- 130321 C23 0.5+ 0.9- 230428 M45 0.5+ 1.2- 040613 360 1.2+ 0.0 130321 C23 1.4+ 0.3- 230428 M45 0.6+ 1.3- 040621 246 1.5+ 0.0 130401 C23 0.1- 0.3+ 230428 M45 0.7+ 0.8- 040621 246 1.8+ 0.4- 130401 C23 0.8+ 0.6- ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2024 Jan. 26