Nakano Note (Nakano wa Kangaeru noda) NK 1921 P/2003 HT15 (LINEAR)
The following improved orbital elements, by S. Nakano, are from 42 observations 2003 Jan. 27 to July 10. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.63 arc second. See an orbit in NK 1110 (= HICQ 2004). Epoch = 2003 May 1.0 TT T = 2003 Apr. 17.71714 +/- 0.02811 (m.e.) TT Peri. = 124.04863 +/- 0.00789 Node = 81.47280 +/- 0.00047 (2000.0) Inc. = 27.67002 +/- 0.00029 q = 2.6714607 +/- 0.0000311 AU e = 0.4198661 +/- 0.0000179 a = 4.6049035 +/- 0.0000330 AU n' = 0.09974090 +/- 0.00000107 P = 9.882 +/- 0.0001063 years (+/- 0.04 day) The predicted orbit for the 2013 return is as follows: T = 2013 Mar. 17.07053 TT Epoch = 2013 Mar. 9.0 TT Peri. = 124.10480 e = 0.4187685 Node = 81.44719 (2000.0) a = 4.6278803 AU Inc. = 27.63628 n'= 0.09899902 q = 2.6898698 AU P = 9.956 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2003/ 030426 704 0.9- 0.5- 030429 704 0.2- 0.4- 030127 704 (1.4+ 2.8+) 030426 704 0.6- 0.4- 030601 A35 0.0 0.5- 030127 704 0.8+ 0.4- 030427 704 0.6- 0.2+ 030601 A35 0.5+ 0.5+ 030127 704 0.6+ 1.5+ 030427 704 0.8+ 0.5+ 030627 J95 (2.1+ 0.5+) 030127 704 0.3- 0.2- 030427 704 1.0- 0.6+ 030627 J95 0.9- 1.0+ 030208 608 0.1+ 0.0 030427 704 0.1+ 0.2+ 030702 H41 1.4+ 0.2- 030208 608 0.1+ 0.4- 030427 704 0.4+ 0.7+ 030702 H41 1.4- 0.8- 030208 608 0.2- 1.2- 030428 704 0.2+ 0.4- 030704 704 0.2+ 0.3+ 030424 704 0.5+ 0.0 030428 704 0.1- 0.4+ 030704 704 1.1+ 1.0- 030424 704 0.0 0.4+ 030428 704 0.1+ 0.2- 030704 704 0.8+ 0.2- 030424 704 0.0 0.8- 030428 704 0.0 0.3- 030704 704 1.1- 1.1+ 030424 704 0.4- 0.9+ 030428 704 0.6- 1.2- 030704 H41 (1.8+ 2.6+) 030424 704 1.1- 0.3+ 030429 704 0.4+ 0.1- 030704 H41 (0.3+ 3.5+) 030426 704 0.5+ 0.4+ 030429 704 0.6+ 0.0 030710 204 1.5+ 0.5- 030426 704 0.6- 0.3+ 030429 704 0.2+ 0.4+ 030710 204 1.0- 0.1- 030426 704 0.2+ 0.0 030429 704 0.4+ 0.2- 030710 204 (1.5- 3.6+) ( ) -------- Rejected Obs.
Associate of Central Bureau for Astronomical Telegrams Syuichi Nakano 2010 Apr. 25