Nakano Note (Nakano wa Kangaeru noda) NK 2412 134P/Kowal-Vavrova
The following improved orbital elements, by S. Nakano, are from 84 observations 1983 to 2013, 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 +/- 0.49 arc second. The residuals from an orbit in NK 2143 (= HICQ 2012) were 11" off for 2013 observations with the delta-T correction = +0.02 day. See the previous orbits in NK 465, NK 514 and NK 2143. Epoch = 2014 May 23.0 TT T = 2014 May 21.50074 +/- 0.00259 (m.e.) TT Peri. = 18.58308 +/- 0.00044 Node = 202.12253 +/- 0.00029 (2000.0) Inc. = 4.34881 +/- 0.00001 q = 2.5713441 +/- 0.0000018 AU e = 0.5873523 +/- 0.0000004 a = 6.2313300 +/- 0.0000012 AU n' = 0.06336259 +/- 0.00000002 P = 15.555 +/- 0.0000045 years A1 = -1.881 +/- 1.106 A2 = +0.18105 +/- 0.01127 T = 1983 Apr. 1.77777 TT Epoch = 1983 Apr. 16.0 TT Peri. = 19.24296 e = 0.5886876 Node = 202.59684 (2000.0) a = 6.3381278 AU Inc. = 4.31212 n'= 0.06176786 q = 2.6069506 AU P = 15.957 years T = 1998 Nov. 18.86324 TT Epoch = 1998 Nov. 3.0 TT Peri. = 18.71317 e = 0.5871895 Node = 202.28579 (2000.0) a = 6.2385783 AU Inc. = 4.34519 n'= 0.06325220 q = 2.5753503 AU P = 15.582 years The predicted orbit for the 2030 return is as follows: T = 2030 Jan. 5.52324 TT Epoch = 2030 Jan. 19.0 TT Peri. = 18.41634 e = 0.5876860 Node = 202.02511 (2000.0) a = 6.3030279 AU Inc. = 4.33214 n'= 0.06228454 q = 2.5988268 AU P = 15.824 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 1983/ 980120 696 0.2+ 0.1+ 990614 402 1.1- 0.8+ 830508 675 0.0 0.8+ 980131 691 0.6- 0.4- 990614 402 1.0- 0.3+ 830508 675 (5.1+ 0.9-) 980131 691 0.3- 0.3- 990615 704 0.6- 0.1- 830509 675 0.0 0.5+ 980131 691 0.7- 0.4- 990615 704 0.4+ 0.1+ 830509 675 (7.3+ 2.0-) 980201 867 0.3+ 0.6+ 990615 704 0.9+ 1.0+ 830514 046 (5.1+ 1.9-) 980201 867 0.0 0.3+ 990615 704 (2.2- 0.2+) 830514 046 0.8- 0.8- 980202 360 0.2+ 0.3+ 990615 704 0.8- 0.5+ 830515 675 0.4- 0.9+ 980202 360 0.3- 0.3+ 990723 402 0.9+ 1.1- 830515 675 (6.2+ 0.3-) 980202 360 0.1- 0.4+ 990723 402 0.6+ 0.6- 830531 046 0.5- 2.0- 980218 867 0.2+ 0.2- 990723 402 1.0+ 0.5- 830531 046 0.6+ 0.0 980218 867 0.1+ 0.1+ 990803 897 0.5+ 0.5- 830928 413 2.7+ 0.5+ 980221 360 0.7- 0.8+ 990803 897 0.3+ 0.3+ 830928 413 0.6- 0.8+ 980221 360 0.9- 0.3- 2000/ 1997/ 980221 360 0.3- 0.3+ 000731 807 0.2+ 0.1- 971203 372 0.1+ 1.0+ 980224 691 0.1- 0.3- 000731 807 0.1+ 0.3- 971205 691 0.4+ 0.4- 980224 691 0.3- 0.1- 2013/ 971205 691 0.0 0.0 980224 691 0.3- 0.2- 130117 F51 0.2+ 0.1- 971205 691 1.3+ 0.5- 980419 360 0.6+ 0.3- 130117 F51 0.0 0.0 971206 691 0.1+ 0.9+ 980419 360 0.4+ 0.2- 130117 F51 0.0 0.0 971206 691 0.2- 0.5- 980428 504 0.6+ 0.5+ 130201 J43 0.8+ 0.1- 971206 691 0.3- 1.2+ 980428 504 0.5+ 0.5+ 130202 J43 0.9- 0.2+ 971229 691 0.2- 0.6- 980519 360 0.1+ 0.2- 130202 J43 0.1- 0.3- 971229 691 0.4+ 1.7- 980519 360 0.2+ 0.3- 130202 J43 0.2- 0.6+ 971229 691 1.0+ 0.0 980519 360 0.4+ 0.2- 130203 J43 0.3+ 0.0 971231 691 0.0 0.4- 980618 696 0.4+ 0.3- 130203 J43 0.2+ 0.2- 971231 691 0.1+ 0.2- 980618 696 0.6+ 0.4- 130203 J43 0.3+ 0.3- 971231 691 0.0 0.4- 980618 696 0.6+ 0.5- 130204 J43 0.3- 0.0 1998/ 1999/ 130210 F51 0.0 0.1+ 980102 867 0.6- 0.1- 990412 693 0.6+ 0.0 130210 F51 0.1- 0.2+ 980102 867 1.0- 0.5- 990608 360 0.6- 0.3+ 130210 F51 0.0 0.2+ 980120 696 0.6- 0.8- 990608 360 0.6- 0.4+ 130210 F51 0.0 0.0 980120 696 0.2- 0.3- 990614 402 0.8- 0.3+ ( ) -------- Rejected Obs.
Associate of Central Bureau for Astronomical Telegrams Syuichi Nakano 2013 Mar. 7