OAA computing section circular NK 1381 P/2005 T4 (SWAN)
The following improved orbital elements, by S. Nakano, are from 30 observations 2005 Oct. 14 to 31. The mean residual is +/- 0.63 arc second. See an orbit on YC 2491. T = 2005 Oct. 10.53811 +/- 0.00296 (m.e.) TT Peri. = 41.44440 +/- 0.00674 Node = 25.42187 +/- 0.00245 (2000.0) Inc. = 160.03609 +/- 0.00042 q = 0.6494001 +/- 0.0000049 AU e = 0.9305758 +/- 0.0008889 a = 9.3540838 +/- 0.0128033 AU n' = 0.03445103 +/- 0.00007073 P = 28.609 +/- 0.0587374 years (+/-21.45 days) The predicted orbit for the 2034 return is as follows: T = 2034 May 5.06520 TT Epoch = 2034 Apr. 28.0 TT Peri. = 41.59456 e = 0.9305180 Node = 25.73156 (2000.0) a = 9.3526891 AU Inc. = 160.18326 n'= 0.03445873 q = 0.6498433 AU P = 28.603 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2005/ 051022 413 0.4- 0.6- 051024 355 1.7- 0.4- 051006 249(4.37+ 0.69-)X 051022 413 0.0 0.5- 051024 372 0.6+ 0.6+ 051009 249(0.95+ 0.37-)X 051023 651 0.1+ 0.6+ 051024 372 1.1+ 0.3+ 051011 249(0.89+ 0.46-)X 051023 651 0.3+ 0.6+ 051024 372 1.6+ 1.2+ 051013 249(2.13+ 0.77-)X 051023 651 0.4+ 1.1+ 051024 372 0.5+ 1.2+ 051014 427 0.0 0.1+ 051023 349 0.1- 0.3+ 051027 427 (0.8- 2.6-) 051022 703 0.5+ 0.3+ 051023 349 0.3- 0.3- 051030 D87 (1.5+ 4.0-) 051022 703 0.3+ 0.0 051023 349 0.3- 0.2- 051030 A79 1.0- 0.8+ 051022 703 0.9+ 0.3- 051023 J76 1.1- 0.6+ 051030 A79 0.7+ 1.2- 051022 413 0.4- 0.2- 051023 J76 0.2- 0.7- 051030 A79 0.2- 0.0 051022 413 0.2- 0.7- 051023 J76 0.4- 0.2- 051031 372 0.5+ 0.1- 051022 413 0.1- 0.6- 051024 355 0.1- 0.4- 051022 413 0.3- 0.4- 051024 355 0.8- 1.0- ( ) -------- Rejected Obs.
Director, Computing Section Late edition Syuichi Nakano 2005 Dec. 7