Nakano Note (Nakano wa Kangaeru noda) NK 3375 P/McNaught (2009 S2 = 2017 M1)
The following improved orbital elements, by S. Nakano, are from 75 observations 2008 to 2017. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.60 arc second. Residuals for the recovery observations were +86" for Right Ascension and -20" for Declination from the prediction in NK 2739 (= HICQ 2016-2017) with the delta-T correction = -0.06 day. Epoch = 2018 Jan. 2.0 TT T = 2017 Dec. 20.94635 +/- 0.00052 (m.e.) TT Peri. = 230.39352 +/- 0.00016 Node = 121.57373 +/- 0.00009 (2000.0) Inc. = 28.41387 +/- 0.00002 q = 2.2140044 +/- 0.0000020 AU e = 0.4691759 +/- 0.0000004 a = 4.1708815 +/- 0.0000012 AU n' = 0.11570771 +/- 0.00000005 P = 8.518 +/- 0.0000037 years T = 2009 June 23.64103 TT Epoch = 2009 June 18.0 TT Peri. = 230.37530 e = 0.4704957 Node = 121.61344 (2000.0) a = 4.1616957 AU Inc. = 28.44907 n'= 0.11609101 q = 2.2036357 AU P = 8.490 years The predicted orbit for the 2026 return is as follows: T = 2026 July 1.39937 TT Epoch = 2026 July 19.0 TT Peri. = 230.52537 e = 0.4695285 Node = 121.45677 (2000.0) a = 4.1694718 AU Inc. = 28.41012 n'= 0.11576640 q = 2.2117859 AU P = 8.514 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 854 0.6+ 0.2- 091012 474 1.0+ 1.6+ 080530 G96 0.0 0.7+ 090924 854 0.2+ 0.1- 091012 474 1.0+ 0.3+ 080530 G96 0.0 0.3+ 090924 854 1.4- 0.4+ 091018 E12 0.2+ 0.2- 080530 G96 0.6+ 0.6+ 090924 H01 0.3+ 0.0 091020 349 0.5+ 1.1+ 080530 G96 0.4+ 0.3+ 090924 H01 0.5+ 0.5- 091020 349 1.1+ 1.4+ 2009/ 090924 H01 0.4+ 0.6- 091111 E12 0.5- 0.9+ 090803 E12 0.1+ 0.1- 090924 H01 0.6+ 0.4- 091111 E12 0.4- 1.1+ 090803 E12 0.7+ 0.1+ 090924 E12 0.1- 0.3- 091111 E12 0.4+ 0.3+ 090803 E12 1.7- 0.3- 090924 E12 0.1+ 0.2- 2010/ 090803 E12 0.6+ 0.4- 090924 E12 0.1+ 0.5- 100125 C51 0.3+ 1.1+ 090920 E12 0.6+ 0.2- 090924 E12 0.1+ 0.3- 100125 C51 1.0- 0.2- 090920 E12 0.2- 0.6- 090924 D21 1.0- 0.1- 100126 C51 0.2+ 0.5+ 090920 E12 0.2+ 0.1- 090924 D21 0.3- 0.4+ 100126 C51 0.1+ 0.3- 090920 E12 0.6+ 0.3- 090924 D21 0.7- 0.0 100126 C51 0.3+ 1.1- 090920 E12 0.1+ 0.0 090925 H06 0.8- 0.8+ 100126 C51 0.1+ 1.9+ 090920 E12 0.2- 0.5- 090925 H06 0.9- 0.0 100126 C51 0.9- 0.4- 090920 E12 0.9- 0.3- 090925 H06 0.7- 0.1+ 100126 C51 0.3- 0.1+ 090921 E12 0.2+ 0.3- 090928 204 0.3- 0.1+ 100126 C51 0.5+ 1.0- 090921 E12 0.8- 0.5- 090928 204 0.1+ 0.4- 100126 C51 1.0+ 0.1+ 090923 E12 0.4- 0.2+ 090929 585 0.7- 0.5+ 100126 C51 1.1- 1.1+ 090923 E12 0.1- 0.3- 090929 585 0.2- 0.3- 2017/ 090923 E12 0.1+ 0.3- 091010 474 0.3+ 0.2+ 170619 461 0.0 0.6+ 090924 I21 0.4+ 0.2- 091010 474 0.4+ 0.1+ 170619 461 0.1+ 0.4+ 090924 I21 1.9+ 0.8- 091010 474 0.3+ 0.0 170620 461 0.2+ 0.6- 090924 H06 0.4+ 0.0 091010 349 0.3+ 0.2+ 170620 461 0.2- 0.1+ 090924 H06 0.2- 0.2- 091010 349 0.8- 0.5- 090924 H06 1.3- 0.2- 091012 474 0.4+ 0.0 ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2017 June 21