Nakano Note (Nakano wa Kangaeru noda) NK 2038 P/2010 T1 (McNaught)

The following improved orbital elements, by S. Nakano, are from 45 observations 2010 Sept. 11 to Nov. 20. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.39 arc second. See an orbit on HICQ 2010/2011. Epoch = 2010 Oct. 11.0 TT T = 2010 Oct. 26.17968 +/- 0.36145 (m.e.) TT Peri. = 220.68194 +/- 0.07379 Node = 130.08328 +/- 0.00319 (2000.0) Inc. = 32.53239 +/- 0.00244 q = 3.2152844 +/- 0.0000951 AU e = 0.3135693 +/- 0.0001077 a = 4.6840626 +/- 0.0001596 AU n' = 0.09722323 +/- 0.00000497 P = 10.138 +/- 0.0005182 years (+/- 0.19 day) The predicted orbit for the 2020 return is as follows: T = 2020 Sept.28.62947 TT Epoch = 2020 Sept.28.0 TT Peri. = 219.38478 e = 0.3200383 Node = 129.17640 (2000.0) a = 4.6133148 AU Inc. = 32.57425 n'= 0.09946824 q = 3.1368772 AU P = 9.909 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2010/ 101005 D96 0.1- 0.3- 101009 D96 0.4+ 0.9- 100911 E12 0.2+ 0.2+ 101005 D96 0.1+ 0.0 101010 372 0.1- 0.5- 100911 E12 0.2+ 0.1+ 101005 D96 0.3- 0.8+ 101010 372 0.5- 0.7+ 100911 E12 0.0 0.2- 101005 D96 0.2+ 0.3- 101010 372 0.7- 1.1+ 100911 E12 0.4- 0.2- 101005 D96 0.2+ 0.3- 101011 D96 0.4- 0.0 101004 E12 0.0 0.1- 101005 D96 0.2+ 0.2- 101011 D96 0.5- 0.4+ 101004 E12 0.3- 0.2- 101005 D96 0.6- 0.1+ 101019 E10 0.2- 0.0 101004 E12 0.3- 0.4- 101005 D96 0.1+ 0.2- 101019 E10 0.2- 0.3+ 101004 E12 0.6+ 0.4- 101005 E12 0.2+ 0.3- 101020 E10 0.2+ 0.2+ 101004 E12 0.0 0.2- 101005 D90 0.4- 0.3+ 101020 E10 0.4- 0.3+ 101004 E12 0.3+ 0.3- 101005 E12 0.3- 0.2- 101118 E10 0.3+ 0.2+ 101005 E12 0.4+ 0.3- 101005 D90 0.1- 0.6- 101118 E10 0.1- 0.1+ 101005 E12 0.2+ 0.2- 101005 D90 0.2+ 0.8+ 101120 D90 0.0 0.7- 101005 E12 0.0 0.3- 101005 D90 0.1- 0.4+ 101120 D90 0.4+ 0.2- 101005 E12 0.2+ 0.4- 101006 E10 0.7+ 0.5+ 101005 D96 0.9+ 0.8+ 101009 D96 0.3- 0.7+ ( ) -------- Rejected Obs.

Associate of Central Bureau for Astronomical Telegrams Syuichi Nakano 2011 Feb. 6

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