Nakano Note (Nakano wa Kangaeru noda) NK 1862 229P/Gibbs (2009 S1 = 2001 Q10)

The following improved orbital elements, by S. Nakano, are from 121 observations 2001 to 2009. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.63 arc second. The runoff of 2001 observations were 0.15 deg from the latest orbit of P/2009 S1. Epoch = 2009 July 28.0 TT T = 2009 Aug. 4.17476 +/- 0.00140 (m.e.) TT Peri. = 224.00356 +/- 0.00051 Node = 157.97974 +/- 0.00023 (2000.0) Inc. = 26.11021 +/- 0.00008 q = 2.4401982 +/- 0.0000090 AU e = 0.3780040 +/- 0.0000024 a = 3.9231737 +/- 0.0000053 AU n' = 0.12683753 +/- 0.00000026 P = 7.771 +/- 0.0000156 years T = 2001 Sept.24.27334 TT Epoch = 2001 Sept. 8.0 TT Peri. = 220.10716 e = 0.3594551 Node = 160.27436 (2000.0) a = 3.8914919 AU Inc. = 27.34802 n'= 0.12838961 q = 2.4926751 AU P = 7.677 years The predicted orbit for the 2017 return is as follows: T = 2017 May 20.75148 TT Epoch = 2017 May 7.0 TT Peri. = 224.14726 e = 0.3760905 Node = 157.90737 (2000.0) a = 3.9362318 AU Inc. = 26.06738 n'= 0.12620689 q = 2.4558525 AU P = 7.809 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2001/ 090924 585 (0.4+ 2.2-) 091021 215 1.6- 0.4+ 010823 608 0.3+ 0.0 090924 585 1.5+ 1.8- 091021 215 0.9- 0.4+ 010824 608 0.6- 0.9+ 090924 585 (1.5+ 2.1-) 091021 215 1.0- 1.2+ 010924 644 0.2- 0.1- 090924 585 1.5+ 1.4- 091026 204 0.1- 0.1- 010924 644 0.1- 0.3+ 090925 H06 1.5- 0.7+ 091026 130 1.0- 0.8+ 011027 644 0.7+ 0.2- 090925 H06 (2.1- 0.1+) 091026 130 0.3+ 0.2+ 011027 644 0.1- 0.2- 090925 H06 (2.7- 0.6-) 091026 130 0.7- 1.2+ 011027 644 0.0 0.0 090925 H10 0.4+ 0.4- 091026 130 1.6+ 0.6- 2009/ 090925 H10 0.7- 0.1+ 091026 204 0.2- 0.2+ 090920 703 0.6- 0.2- 090925 H10 (0.1+ 2.0+) 091030 E85 0.2+ 0.0 090920 703 1.1- 0.3- 090925 349 (3.0- 1.0+) 091030 E85 0.6- 0.3+ 090920 703 (2.1- 0.2+) 090925 349 (2.5- 0.3+) 091030 E85 0.2+ 0.2+ 090920 703 1.5- 0.3+ 090927 213 0.1- 0.1- 091108 D90 0.1+ 0.5- 090920 703 0.9- 0.3- 090927 213 0.1+ 0.1+ 091108 D90 0.3+ 0.4- 090920 703 0.5- 0.4+ 090927 213 0.2- 0.1- 091108 D90 0.6+ 0.0 090920 703 0.2+ 0.2- 090927 A77 0.3+ 0.1- 091109 204 0.3+ 0.0 090920 703 0.2- 0.4+ 090927 A77 0.1- 0.4- 091110 204 0.1+ 0.1+ 090920 D90 0.1- 0.2- 090927 A77 0.1+ 0.5- 091116 A77 0.4+ 0.2- 090920 D90 0.3- 0.1+ 090928 H06 0.3- 1.0- 091116 A77 0.3- 0.1- 090921 I21 1.8+ 0.9- 090928 H06 0.9- 0.4- 091116 A77 0.2- 0.4+ 090921 I21 1.1+ 1.3- 090928 585 (2.1- 0.9-) 091117 I10 0.2- 0.5- 090921 I20 0.4- 0.9+ 090928 585 (2.6- 0.5-) 091117 I10 0.2- 0.5- 090921 I20 0.6- 0.8+ 090929 204 0.3+ 0.1- 091118 I10 0.8+ 1.7- 090921 I20 0.9- 0.9+ 090929 850 0.5- 0.7+ 091118 I10 0.0 0.1- 090921 H06 0.2- 0.6+ 090929 850 1.1- 0.9- 091118 703 0.7+ 1.8+ 090921 H36 0.2- 0.2- 090929 850 (2.8- 0.2-) 091118 703 (1.6- 3.0+) 090921 H36 0.7- 0.2+ 090930 A77 0.6- 0.4+ 091118 703 (0.9- 2.7+) 090921 H36 0.3+ 0.4- 090930 A77 0.3+ 0.7- 091118 703 (1.7- 3.5+) 090921 H06 0.5+ 0.1- 091010 474 0.4+ 0.2- 091119 900 0.2- 1.4+ 090921 H36 0.5+ 0.1+ 091010 474 0.0 0.2- 091119 900 (0.7+ 3.6+) 090921 H06 0.4- 0.4+ 091010 474 0.3+ 0.1- 091120 I10 0.1- 0.1+ 090921 H36 0.1+ 0.3- 091010 474 0.3+ 0.1+ 091120 I10 0.5+ 0.1- 090921 H06 0.5- 0.7+ 091014 372 0.7- 0.4- 091120 H10 0.2+ 0.6- 090921 H06 1.1- 0.9+ 091015 900 0.2+ 0.4- 091120 H10 0.2+ 0.2+ 090921 F65 0.9+ 0.0 091015 900 0.2- 0.2+ 091120 H10 0.4- 0.7+ 090921 F65 0.7+ 0.2- 091015 585 (1.1+ 2.8+) 091124 A77 0.5+ 0.3- 090921 F65 1.2+ 0.0 091015 585 (0.5+ 4.3+) 091125 I10 0.7- 0.2- 090921 F65 1.1+ 0.1- 091018 585 1.1+ 0.2- 091125 I10 0.2- 0.3- 090922 204 0.1+ 0.1- 091019 349 0.2- 0.3- 091201 900 (0.4- 2.6+) 090922 204 0.0 0.1- 091019 349 0.8- 0.3+ 091201 900 1.0+ 0.5+ 090922 854 0.5+ 0.3+ 091020 H45 0.3+ 0.1+ 091205 I10 (2.8+ 0.1-) 090922 854 0.2- 0.3+ 091020 H45 0.2- 0.5+ 091205 I10 (4.3+ 2.1-) 090922 854 0.3- 0.6+ 091020 H45 0.5- 1.0+ 091205 I10 (4.5+ 1.6-) 090922 673 0.5+ 0.6- 091020 H45 0.5- 0.1+ 091205 I10 0.8- 0.8- 090922 673 0.3- 0.5+ 091020 H45 0.0 0.8+ 091205 I10 0.9+ 0.4- 090922 673 0.0 0.0 091020 900 (2.1- 2.6+) 091205 I10 0.3+ 1.6- 090922 673 0.7+ 0.4- 091020 900 (3.0+ 0.1+) 091208 A77 0.6+ 1.2+ 090924 585 0.4+ 1.1- 091020 E16 0.0 0.1+ 091208 A77 0.8+ 0.6+ 090924 585 1.0+ 0.5- 091020 E16 0.2+ 0.2- 091208 A77 (1.2+ 2.6+) ( ) -------- Rejected Obs.

Associate of Central Bureau for Astronomical Telegrams Syuichi Nakano 2009 Dec. 12

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