Nakano Note (Nakano wa Kangaeru noda) NK 1863 C/2009 P1 (Garradd)

The following improved orbital elements, by S. Nakano, are from 88 observations 2009 Aug. 13 to Nov. 10. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.59 arc second. See an orbit on HICQ 2009/2010. Epoch = 2011 Dec. 25.0 TT T = 2011 Dec. 23.79339 +/- 0.12772 (m.e.) TT Peri. = 90.73711 +/- 0.01080 Node = 325.99104 +/- 0.00482 (2000.0) Inc. = 106.18542 +/- 0.00570 q = 1.5511343 +/- 0.0004333 AU e = 1.0010525 +/- 0.0001266 1/a = -0.0006785 +/- 0.0000816 1/AU origin = +0.000399 (Q= 5) future = +0.000141 The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2009/ 090827 423 0.6+ 0.2- 090914 J24 0.2- 1.9- 090813 E12 0.9+ 0.5- 090830 423 0.2+ 0.4+ 090915 I21 (2.0- 1.1+) 090813 E12 0.2+ 1.9- 090830 423 0.0 0.6+ 090915 I21 (0.8- 3.0-) 090813 E12 0.2+ 0.3- 090831 423 0.1- 0.0 090915 I21 (2.7+ 2.0-) 090813 E12 0.3+ 0.1+ 090831 423 0.2- 0.6- 090918 E12 0.4+ 0.7- 090814 I21 1.4+ 0.0 090831 D90 0.7- 0.5+ 090919 423 0.6+ 0.1- 090814 I21 1.3+ 1.2+ 090831 D90 0.8- 0.3+ 090919 423 0.1+ 0.9- 090814 E12 0.1- 0.4- 090831 D90 0.7- 0.4+ 090919 D90 0.1+ 0.7+ 090814 E12 0.3- 0.0 090902 E94 1.0+ 0.4+ 090919 D90 0.2+ 1.5+ 090815 E16 0.1+ 0.5- 090902 E94 (2.1- 2.1-) 090922 474 0.2- 0.4+ 090815 E16 0.8- 0.3- 090902 E94 1.1+ 1.8+ 090922 474 0.0 0.3- 090815 E12 0.0 0.2- 090902 E94 (2.9+ 1.6-) 090922 474 0.0 0.3- 090817 423 0.4+ 0.3+ 090902 E94 (4.0+ 0.3+) 090922 474 0.3- 0.3+ 090817 423 0.2+ 0.0 090909 E12 0.1- 0.1- 090924 423 0.4+ 0.2- 090818 423 0.3+ 0.7- 090909 E12 0.2- 0.6- 090924 423 0.2+ 0.0 090818 423 0.0 0.3- 090910 D90 0.5+ 1.3+ 090925 423 0.4+ 0.3+ 090818 E12 0.2- 0.1- 090910 D90 0.5+ 0.9+ 090925 423 0.2- 0.5- 090823 I21 0.7+ 0.1- 090911 I19 0.5+ 0.0 091002 I36 0.5+ 0.8- 090823 I21 0.8+ 0.4+ 090911 I19 0.1+ 0.3+ 091002 I36 0.5+ 0.5- 090825 D25 0.7- 0.0 090911 I19 0.2- 1.1- 091002 I36 0.5+ 0.2- 090825 D25 0.2+ 0.3- 090911 423 0.3+ 0.3- 091004 I36 0.3- 0.3- 090826 423 0.0 0.3+ 090911 423 0.3+ 0.6- 091004 I36 0.4- 0.2- 090826 423 0.3- 0.3- 090912 423 0.1- 0.3- 091004 I36 0.9- 0.1+ 090826 D90 0.7- 0.5+ 090912 423 0.8+ 0.1- 091104 E16 0.0 0.1+ 090826 D90 0.9- 0.2+ 090913 I21 (1.7- 2.4-) 091104 E16 0.1+ 0.3+ 090826 D90 1.4- 0.3+ 090913 I21 0.4- 1.2- 091108 415 0.9- 0.5+ 090826 D20 0.5- 0.4+ 090913 423 0.8+ 0.0 091108 415 0.3- 0.2+ 090826 D20 1.0- 0.6+ 090913 423 0.4+ 0.6- 091109 423 0.2+ 0.0 090826 D20 1.1- 0.4+ 090913 D25 0.2- 0.4+ 091109 423 0.3- 0.2- 090826 D20 0.6- 0.5+ 090913 D25 0.0 0.2+ 091110 423 0.4+ 0.3- 090826 D20 0.7- 0.6+ 090913 D25 0.1- 0.3+ 091110 423 0.8+ 0.3+ 090826 D20 0.6- 0.8+ 090914 J24 1.7- 0.3+ 090827 423 0.1+ 0.4- 090914 J24 (2.0- 0.4-) ( ) -------- Rejected Obs.

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

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