Nakano Note (Nakano wa Kangaeru noda) NK 1743 147P/Kushida-Muramatsu
The following improved orbital elements, by S. Nakano, are from 69 observations 1994 to 2008, 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). Water-Ice vaporization gives A1= +12.7 and A2= -0.756. The mean residual is +/- 0.74 arc second. See the previous orbits in NK 675 and NK 910. If 2001/2002 observations are included, nongravitational parameters are Y1= +0.18 and Y2= -0.0217 although showing some bad residuals. There mightbe other solution.... Epoch = 2008 Sept.11.0 TT T = 2008 Sept.23.00236 +/- 0.04708 (m.e.) TT Peri. = 346.87876 +/- 0.01078 Node = 93.75729 +/- 0.00066 (2000.0) Inc. = 2.36717 +/- 0.00003 q = 2.7563549 +/- 0.0000127 AU e = 0.2759530 +/- 0.0000247 a = 3.8068729 +/- 0.0000345 AU n' = 0.13269407 +/- 0.00000180 P = 7.428 +/- 0.0001009 years Y1 = -1.407 +/- 0.807 Y2 = +0.00717 +/- 0.01039 (+/- 0.04 day) T = 2001 Apr. 29.52302 TT Epoch = 2001 May 11.0 TT Peri. = 347.49611 e = 0.2775224 Node = 93.76172 (2000.0) a = 3.8096005 AU Inc. = 2.36787 n'= 0.13255159 q = 2.7523511 AU P = 7.436 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 1994/ 950623 691 1.2- 2.0- 020208 691(30.0- 14.3+) 941208 691 0.4+ 1.5+ 1999/ 020215 360(29.5- 14.0+) 941208 691 0.0 1.5+ 990913 695 0.5+ 1.4- 020215 360(29.9- 14.5+) 941209 691 1.0+ 1.8+ 990913 695 0.8+ 1.3- 020215 360(29.8- 14.5+) 941209 691 0.3- 1.8+ 990913 695 0.2+ 1.5- 020320 691(27.3- 13.5+) 941209 691 0.6+ 0.9+ 991113 695 0.3+ 0.7- 020320 691(28.5- 13.9+) 1995/ 991113 695 0.2+ 0.1+ 020320 691(27.3- 12.9+) 950113 413 0.1- 0.2+ 991113 695 0.3- 1.1- 2008/ 950113 413 0.4- 0.4+ 2000/ 081221 691 0.2- 0.5- 950131 691 0.1+ 0.2+ 000926 867 0.3+ 0.5+ 081221 691 0.2+ 0.1- 950201 691 0.2+ 0.5+ 000926 867 0.5- 0.1- 081221 691 0.1- 0.8- 950210 360 0.1- 0.5+ 000926 867 0.2+ 0.3- 081222 461 0.5+ 0.1+ 950210 360 0.2+ 0.5+ 001003 867 0.4- 0.8+ 081222 461 0.3+ 0.6- 950210 360 0.1+ 0.4+ 001003 867 0.8+ 1.5+ 081222 461 0.6+ 0.7- 950227 360 0.2+ 0.2- 001003 867 0.1- 0.3+ 081223 461 0.3+ 0.7- 950227 360 0.1+ 0.2+ 001003 867 (1.7- 2.6+) 081223 461 1.0+ 0.2+ 950227 360 0.2- 0.4+ 001004 867 0.3+ 0.5- 081223 461 0.7+ 0.2- 950307 587 1.3- 0.0 001004 867 1.8- 0.3+ 081224 461 0.9+ 0.3+ 950307 587 0.1+ 0.4- 001004 867 0.0 2.0+ 081224 461 0.1+ 0.3- 950321 413 0.4+ 0.0 001004 867 1.5- 0.1- 081224 461 0.3+ 0.2- 950321 413 0.5+ 0.2+ 001008 809 0.2+ 0.3+ 081228 349 0.5- 0.4+ 950402 693 0.3+ 0.6+ 001008 809 0.4+ 0.3+ 081228 349 0.3- 0.0 950402 693 0.2+ 0.5+ 001008 809 0.2+ 0.1+ 081228 349 0.8- 0.6+ 950402 693 0.3+ 0.4+ 2001/ 081229 691 0.0 0.5- 950403 360 0.9+ 0.7- 011214 691(21.2- 11.6+) 081229 691 0.5- 0.6- 950403 360 0.1- 1.4- 011214 691(20.5- 11.0+) 081229 691 0.5- 0.3- 950403 360 0.2+ 0.9- 011214 691(21.3- 12.7+) 081230 704 0.4- 1.3- 950622 691 0.2- 1.7- 2002/ 081230 704 1.1- 1.5- 950622 691 0.1- 1.4- 020208 691(29.6- 14.6+) 081230 704 1.3- 1.2- 950623 691 1.0- 1.3- 020208 691(29.9- 14.0+) 081230 704 (2.1- 2.7-) ( ) -------- Rejected Obs.
Managing Director of the Oriental Astronomical Association Syuichi Nakano 2009 Jan. 6