Nakano Note (Nakano wa Kangaeru noda) NK 5285 P/1942 EA (Vaisala 2)
The following improved orbital elements, by S. Nakano, are from 33 observations 1942 Mar. 11 to Apr. 17. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 1.67 arc seconds. Epoch = 1942 Feb. 10.0 TT T = 1942 Feb. 15.81712 +/- 0.00308 (m.e.) TT Peri. = 335.22087 +/- 0.00214 Node = 172.29053 +/- 0.00062 (2000.0) Inc. = 37.99695 +/- 0.01059 q = 1.2870877 +/- 0.0001032 AU e = 0.9337090 +/- 0.0006690 a = 19.4157291 +/- 0.1959377 AU n' = 0.01152056 +/- 0.00017439 P = 85.552 +/- 1.2950488 years (+/- 1.30 years) The predicted orbit for the 2028 return is as follows: Prediction T is uncertain within +/- 1.5 years. T = 2028 Jan. 24.37517 TT Epoch = 2028 Jan. 30.0 TT Peri. = 335.37762 e = 0.9341530 Node = 172.38757 (2000.0) a = 19.5451041 AU Inc. = 37.99947 n'= 0.01140636 q = 1.2869862 AU P = 86.409 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 1942/ 420317 062 3.2+ 0.8- 420323 053 (4.2+ 0.9-) 420311 062 2.1- 0.3- 420317 062 0.2- 0.8+ 420325 062 0.7+ 0.1+ 420313 062 0.4- 2.1- 420318 062 0.5- 1.5+ 420328 062 1.1+ 0.2+ 420313 062 0.6+ 0.8+ 420318 062 2.5+ 2.2+ 420403 062 0.5- 2.6- 420313 062 0.9+ 0.5- 420319 062 2.2- 2.5- 420403 062 0.0 2.5+ 420313 062 0.2+ 2.2+ 420320 062 2.5- 2.5+ 420409 062 0.6+ 0.4+ 420314 062 2.1+ 0.4- 420320 047 1.7+ 1.5- 420409 062 0.7- 2.2- 420314 062 0.3- 3.1- 420321 062 1.7- 0.1+ 420410 062 1.3+ 0.2+ 420314 062 2.1+ 2.3+ 420321 053 (0.8+ 4.4-) 420412 062 0.8+ 0.2+ 420314 062 2.7- 1.1- 420321 004 (3.4- 4.1-) 420414 062 2.3- 2.0+ 420315 062 1.2+ 0.1+ 420321 004 3.0- 0.7- 420417 062 1.2+ 0.8- 420316 062 1.8- 0.6- 420321 546 1.4- 3.4- 420317 062 0.3+ 3.2+ 420321 053 2.0+ 1.2+ ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2024 Sept. 13