Nakano Note (Nakano wa Kangaeru noda) NK 2143 134P/Kowal-Vavrova
The following improved orbital elements, by S. Nakano, are from 68 observations 1983 to 2000. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.58 arc second. See the previous orbits in NK 465, NK 514 and MPC 31205 (= HICQ 1999). Epoch = 1998 Nov. 3.0 TT T = 1998 Nov. 18.86354 +/- 0.00069 (m.e.) TT Peri. = 18.71317 +/- 0.00036 Node = 202.28586 +/- 0.00035 (2000.0) Inc. = 4.34520 +/- 0.00002 q = 2.5753476 +/- 0.0000006 AU e = 0.5871885 +/- 0.0000001 a = 6.2385558 +/- 0.0000003 AU n' = 0.06325254 +/- 0.00000001 P = 15.582 +/- 0.0000013 years T = 1983 Apr. 1.77989 TT Epoch = 1983 Apr. 16.0 TT Peri. = 19.24345 e = 0.5886877 Node = 202.59690 (2000.0) a = 6.3381225 AU Inc. = 4.31214 n'= 0.06176794 q = 2.6069476 AU P = 15.957 years The predicted orbit for the 2014 return is as follows: T = 2014 May 21.47184 TT Epoch = 2014 May 23.0 TT Peri. = 18.58239 e = 0.5873499 Node = 202.12261 (2000.0) a = 6.2312876 AU Inc. = 4.34882 n'= 0.06336324 q = 2.5713417 AU P = 15.555 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 1983/ 1998/ 980519 360 0.3+ 0.3- 830508 675 0.2+ 0.7+ 980102 867 0.7- 0.0 980519 360 0.5+ 0.2- 830508 675 (5.3+ 0.9-) 980102 867 1.0- 0.5- 980618 696 0.5+ 0.3- 830509 675 0.3+ 0.4+ 980120 696 0.6- 0.7- 980618 696 0.7+ 0.4- 830509 675 (7.5+ 2.1-) 980120 696 0.2- 0.2- 980618 696 0.7+ 0.5- 830514 046 (5.3+ 2.0-) 980120 696 0.2+ 0.1+ 1999/ 830514 046 0.6- 0.8- 980131 691 0.6- 0.3- 990412 693 0.6+ 0.1- 830515 675 0.2- 0.8+ 980131 691 0.3- 0.3- 990608 360 0.6- 0.2+ 830515 675 (6.4+ 0.4-) 980131 691 0.7- 0.4- 990608 360 0.6- 0.4+ 830531 046 0.3- 2.1- 980201 867 0.3+ 0.7+ 990614 402 0.8- 0.2+ 830531 046 0.8+ 0.1- 980201 867 0.0 0.4+ 990614 402 1.1- 0.7+ 830928 413 (2.5+ 0.5+) 980202 360 0.2+ 0.4+ 990614 402 1.1- 0.3+ 830928 413 0.8- 0.8+ 980202 360 0.3- 0.4+ 990615 704 0.6- 0.1- 1997/ 980202 360 0.1- 0.5+ 990615 704 0.3+ 0.0 971203 372 0.1+ 1.1+ 980218 867 0.2+ 0.2- 990615 704 0.9+ 0.9+ 971205 691 0.3+ 0.4- 980218 867 0.1+ 0.2+ 990615 704 (2.2- 0.1+) 971205 691 0.1- 0.1+ 980221 360 0.7- 0.9+ 990615 704 0.8- 0.4+ 971205 691 1.2+ 0.4- 980221 360 0.9- 0.2- 990723 402 0.9+ 1.2- 971206 691 0.0 1.0+ 980221 360 0.3- 0.4+ 990723 402 0.6+ 0.6- 971206 691 0.3- 0.5- 980224 691 0.1- 0.2- 990723 402 1.0+ 0.5- 971206 691 0.4- 1.3+ 980224 691 0.3- 0.0 990803 897 0.6+ 0.6- 971229 691 0.2- 0.6- 980224 691 0.3- 0.2- 990803 897 0.3+ 0.3+ 971229 691 0.4+ 1.6- 980419 360 0.7+ 0.2- 2000/ 971229 691 1.0+ 0.1+ 980419 360 0.4+ 0.1- 000731 807 0.6+ 0.1- 971231 691 0.1- 0.4- 980428 504 0.7+ 0.6+ 000731 807 0.5+ 0.2- 971231 691 0.0 0.1- 980428 504 0.5+ 0.6+ 971231 691 0.0 0.3- 980519 360 0.2+ 0.1- ( ) -------- Rejected Obs.
Associate of Central Bureau for Astronomical Telegrams Syuichi Nakano 2011 Oct. 31