Nakano Note (Nakano wa Kangaeru noda) NK 2739 P/2009 S2 (McNaught)
The following improved orbital elements, by S. Nakano, are from 70 observations 2008 May 30 to 2010 Jan. 26. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.59 arc second. Epoch = 2009 June 18.0 TT T = 2009 June 23.64042 +/- 0.00101 (m.e.) TT Peri. = 230.37510 +/- 0.00033 Node = 121.61340 +/- 0.00013 (2000.0) Inc. = 28.44909 +/- 0.00004 q = 2.2036362 +/- 0.0000021 AU e = 0.4705025 +/- 0.0000086 a = 4.1617502 +/- 0.0000162 AU n' = 0.11608873 +/- 0.00000068 P = 8.490 +/- 0.0000497 years The predicted orbit for the 2017 return is as follows: T = 2017 Dec. 21.00641 TT Epoch = 2018 Jan. 2.0 TT Peri. = 230.39334 e = 0.4691828 Node = 121.57369 (2000.0) a = 4.1709352 AU Inc. = 28.41389 n'= 0.11570548 q = 2.2140039 AU P = 8.518 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2008/ 090924 H06 0.1- 0.2- 091010 474 0.4+ 0.1- 080530 G96 0.1+ 0.9+ 090924 H06 1.3- 0.2- 091010 349 0.3+ 0.1+ 080530 G96 0.1+ 0.4+ 090924 854 0.7+ 0.2- 091010 349 0.8- 0.5- 080530 G96 0.6+ 0.7+ 090924 854 0.2+ 0.1- 091012 474 0.4+ 0.0 080530 G96 0.5+ 0.5+ 090924 854 1.3- 0.4+ 091012 474 1.0+ 1.5+ 2009/ 090924 H01 0.3+ 0.0 091012 474 1.1+ 0.3+ 090803 E12 0.1+ 0.0 090924 H01 0.5+ 0.5- 091018 E12 0.2+ 0.3- 090803 E12 0.7+ 0.2+ 090924 H01 0.4+ 0.6- 091020 349 0.5+ 1.0+ 090803 E12 1.7- 0.2- 090924 H01 0.6+ 0.4- 091020 349 1.1+ 1.3+ 090803 E12 0.5+ 0.3- 090924 E12 0.0 0.3- 091111 E12 0.5- 0.8+ 090920 E12 0.7+ 0.2- 090924 E12 0.1+ 0.2- 091111 E12 0.4- 1.0+ 090920 E12 0.2- 0.6- 090924 E12 0.2+ 0.5- 091111 E12 0.4+ 0.2+ 090920 E12 0.3+ 0.1- 090924 E12 0.2+ 0.3- 2010/ 090920 E12 0.6+ 0.2- 090924 D21 1.0- 0.1- 100125 C51 0.3+ 1.1+ 090920 E12 0.1+ 0.0 090924 D21 0.2- 0.4+ 100125 C51 1.1- 0.2- 090920 E12 0.2- 0.5- 090924 D21 0.7- 0.0 100126 C51 0.1+ 0.5+ 090920 E12 0.9- 0.2- 090925 H06 0.8- 0.8+ 100126 C51 0.1+ 0.3- 090921 E12 0.2+ 0.3- 090925 H06 0.8- 0.0 100126 C51 0.3+ 1.0- 090921 E12 0.8- 0.5- 090925 H06 0.7- 0.1+ 100126 C51 0.0 1.9+ 090923 E12 0.3- 0.2+ 090928 204 0.3- 0.1+ 100126 C51 1.0- 0.3- 090923 E12 0.1- 0.3- 090928 204 0.2+ 0.4- 100126 C51 0.3- 0.1+ 090923 E12 0.1+ 0.3- 090929 585 0.7- 0.5+ 100126 C51 0.5+ 1.0- 090924 I21 0.4+ 0.2- 090929 585 0.2- 0.3- 100126 C51 1.0+ 0.2+ 090924 I21 (2.0+ 0.8-) 091010 474 0.4+ 0.1+ 100126 C51 1.1- 1.2+ 090924 H06 0.4+ 0.0 091010 474 0.5+ 0.0 ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2014 June 25