OAA computing section circular NK 911 D/1917 F1 (Mellish)

The following improved orbital elements, by S. Nakano, are from 30 observations 1917 Mar. 24 to June 20. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 2.47 arc seconds. Epoch = 1917 Apr. 2.0 TT T = 1917 Apr. 11.17544 +/- 0.00030 (m.e.) TT Peri. = 121.31934 +/- 0.00145 Node = 88.66672 +/- 0.00240 (2000.0) Inc. = 32.68201 +/- 0.00046 q = 0.1901768 +/- 0.0000034 AU e = 0.9931311 +/- 0.0000125 a = 27.6865565 +/- 0.0018180 AU n' = 0.00676551 +/- 0.00000066 P = 145.681 +/- 0.0143587 years (+/- 5.24 day) The predicted orbit for the 2061 return is as follows: T = 2061 Oct. 29.61953 TT Epoch = 2061 Oct. 23.0 TT Peri. = 121.67886 e = 0.9931056 Node = 87.86200 (2000.0) a = 28.7032064 AU Inc. = 32.94214 n'= 0.00640927 q = 0.1978912 AU P = 153.779 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 1917/ 170423 051(10.5+ 5.6+)Y 170514 051 0.2- 3.3+ Y 170324 020 0.0 1.1+ 170423 907 1.4+ 2.7+ 170515 051 0.1+ 0.7- Y 170325 531 1.0+ 4.8- 170425 051 1.0+ 1.0+ Y 170516 051 2.2+ 1.4+ Y 170327 531 1.4- 2.5- 170426 051 4.9+ 1.7+ Y 170516 051(14.6- 14.3+)Y 170327 008 (2.1- 20.9-)X 170428 051 0.7+ 1.3+ Y 170517 051 2.4- 2.9+ Y 170327 008(13.9+ 5.8+)X 170429 051 (9.3+ 3.7+)Y 170518 051 0.7+ 0.5- Y 170328 008(12.4- 16.2-) 170501 051 0.7- 1.1+ Y 170528 051 (1.3- 11.4+)Y 170329 531 1.1- 0.1+ 170501 907 1.4+ 0.4+ 170528 051 0.7- 2.3- Y 170330 531 1.0- 3.8+ 170502 051 6.2- 2.5+ Y 170529 051 3.3+ 3.0- Y 170330 008 2.3- 1.0+ 170506 051 2.2+ 1.4+ Y 170530 051(65.0- 27.1+)Y 170331 008 4.5- 0.2+ 170508 051 0.8- 0.1+ Y 170603 051 0.9+ 2.4- Y 170402 531 3.2- 2.4+ 170509 051 4.7+ 2.0+ Y 170604 051 (3.4- 13.5-)Y 170419 051 (0.7- 12.8+)Y 170511 051 0.1- 3.6- Y 170617 051 (7.4- 21.2-)Y 170419 907 2.3+ 2.1+ 170511 051 (1.1- 22.8+)Y 170620 051 6.7- 1.1- Y 170421 051 1.4+ 4.2+ Y 170514 051 (8.5+ 0.6+)Y ( ) -------- Rejected Obs.

Director, Computing Section Syuichi Nakano 2003 Jan. 23

Back to Nakano Note Page