OAA computing section circular NK 1677 205P/Giacobini (1896 R2 = 2008 R2) [Temporary numbered]
The following improved orbital elements, by S. Nakano, are from 207 observations 1896 to 2008 (cf. 1896/1897 positions were made from Belyaev's orbit on CCO 2003), including planetary perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas, Vesta, and non-gravitational effect of style II. The mean residual is +/- 0.63 arc second. The comet has made 17 revolutions between 1896 and 2008 and passed 0.51 AU from the Earth on 1962 Sept. 8, also 0.89 AU and 0.81 AU from Jupiter on 1932 July 4 and 1992 Jan. 11 UT, respectively. See a pre- diction in NK 1211 and on a plotting diagram on all sky published on Tenmon Guide 10, p.149, 2008. Epoch = 2008 Sept.11.0 TT T = 2008 Sept.10.08372 +/- 0.00179 (m.e.) TT Peri. = 154.25012 +/- 0.00127 Node = 179.62698 +/- 0.00022 (2000.0) Inc. = 15.30565 +/- 0.00015 q = 1.5263663 +/- 0.0000079 AU e = 0.5687659 +/- 0.0000020 a = 3.5395309 +/- 0.0000069 AU n' = 0.14800811 +/- 0.00000044 P = 6.659 +/- 0.0000196 years A1 = +1.097 +/- 0.029 A2 = +0.02518 +/- 0.00056 T = 1896 Oct. 28.54570 TT Epoch = 1896 Nov. 17.0 TT Peri. = 140.51649 e = 0.5885768 Node = 194.89777 (2000.0) a = 3.5359731 AU Inc. = 11.35091 n'= 0.14823155 q = 1.4547814 AU P = 6.649 years [ T = 1903 June 19.19881 TT Epoch = 1903 June 15.0 TT Peri. = 140.49783 e = 0.5898312 Node = 194.87143 (2000.0) a = 3.5308631 AU Inc. = 11.36478 n'= 0.14855346 q = 1.4482499 AU P = 6.635 years ] [ T = 1910 Feb. 3.11903 TT Epoch = 1910 Feb. 18.0 TT Peri. = 140.47276 e = 0.5896040 Node = 194.88551 (2000.0) a = 3.5304680 AU Inc. = 11.37238 n'= 0.14857839 q = 1.4488898 AU P = 6.634 years ] [ T = 1916 Sept.19.59432 TT Epoch = 1916 Sept.14.0 TT Peri. = 140.55963 e = 0.5908961 Node = 194.81933 (2000.0) a = 3.5232969 AU Inc. = 11.39102 n'= 0.14903224 q = 1.4413947 AU P = 6.613 years ] [ T = 1923 Apr. 16.34795 TT Epoch = 1923 Apr. 11.0 TT Peri. = 142.40234 e = 0.6024458 Node = 193.67887 (2000.0) a = 3.4632264 AU Inc. = 11.89953 n'= 0.15292650 q = 1.3768201 AU P = 6.445 years ] [ T = 1929 Sept.26.91604 TT Epoch = 1929 Sept.26.0 TT Peri. = 142.53226 e = 0.6028632 Node = 193.58705 (2000.0) a = 3.4605818 AU Inc. = 11.91306 n'= 0.15310183 q = 1.3743243 AU P = 6.438 years ] [ T = 1936 Mar. 19.38088 TT Epoch = 1936 Mar. 13.0 TT Peri. = 148.54260 e = 0.5869843 Node = 186.39831 (2000.0) a = 3.5045398 AU Inc. = 13.29980 n'= 0.15023032 q = 1.4474300 AU P = 6.561 years ] [ T = 1942 Oct. 15.80705 TT Epoch = 1942 Oct. 8.0 TT Peri. = 148.65585 e = 0.5861344 Node = 186.32773 (2000.0) a = 3.5090597 AU Inc. = 13.29839 n'= 0.14994015 q = 1.4522791 AU P = 6.573 years ] [ T = 1949 May 17.70636 TT Epoch = 1949 May 4.0 TT Peri. = 148.83779 e = 0.5834259 Node = 186.12482 (2000.0) a = 3.5220533 AU Inc. = 13.30742 n'= 0.14911117 q = 1.4671962 AU P = 6.610 years ] [ T = 1955 Dec. 31.87460 TT Epoch = 1956 Jan. 8.0 TT Peri. = 148.86036 e = 0.5816182 Node = 186.10723 (2000.0) a = 3.5311708 AU Inc. = 13.29241 n'= 0.14853404 q = 1.4773777 AU P = 6.636 years ] [ T = 1962 Aug. 15.80977 TT Epoch = 1962 Aug. 4.0 TT Peri. = 148.82583 e = 0.5827523 Node = 186.08803 (2000.0) a = 3.5270420 AU Inc. = 13.30834 n'= 0.14879493 q = 1.4716503 AU P = 6.624 years ] [ T = 1969 Mar. 29.54383 TT Epoch = 1969 Apr. 9.0 TT Peri. = 148.78509 e = 0.5821725 Node = 186.11359 (2000.0) a = 3.5283441 AU Inc. = 13.30873 n'= 0.14871257 q = 1.4742390 AU P = 6.628 years ] [ T = 1975 Nov. 11.36957 TT Epoch = 1975 Nov. 4.0 TT Peri. = 148.85026 e = 0.5835096 Node = 186.06185 (2000.0) a = 3.5208247 AU Inc. = 13.33065 n'= 0.14918923 q = 1.4663897 AU P = 6.606 years ] [ T = 1982 June 7.34827 TT Epoch = 1982 May 31.0 TT Peri. = 149.73229 e = 0.5917968 Node = 185.64504 (2000.0) a = 3.4783342 AU Inc. = 13.60274 n'= 0.15193125 q = 1.4198671 AU P = 6.487 years ] [ T = 1988 Dec. 2.82510 TT Epoch = 1988 Nov. 15.0 TT Peri. = 149.85354 e = 0.5923107 Node = 185.56437 (2000.0) a = 3.4746073 AU Inc. = 13.61872 n'= 0.15217576 q = 1.4165603 AU P = 6.477 years ] [ T = 1995 June 6.70084 TT Epoch = 1995 June 12.0 TT Peri. = 154.00502 e = 0.5721924 Node = 179.85758 (2000.0) a = 3.5231203 AU Inc. = 15.30004 n'= 0.14904344 q = 1.5072177 AU P = 6.613 years ] [ T = 2002 Jan. 21.06312 TT Epoch = 2002 Jan. 6.0 TT Peri. = 154.11668 e = 0.5713442 Node = 179.79149 (2000.0) a = 3.5273020 AU Inc. = 15.29694 n'= 0.14877847 q = 1.5119984 AU P = 6.625 years ] The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 1896/ 080910 B18 0.5- 0.6- 080911 367 0.1- 0.4- 961104 500 0.4- 1.0- Y 080910 B18 0.7- 0.5- 080911 372 0.2- 1.6+ 961105 500 0.8- 1.4- Y 080910 952 0.6- 0.3- 080911 372 0.6- 1.3+ 961107 500 0.3+ 0.7- Y 080910 952 0.3- 0.4- 080911 372 1.0- 1.7+ 961110 500 0.1+ 0.4- Y 080910 A99 0.4- 0.1- 080911 048 (2.8- 0.7+) 961113 500 0.6- 1.0- Y 080910 A99 0.6- 0.1- 080911 048 (2.7- 0.7+) 961116 500 0.8+ 0.4- Y 080910 A99 0.4- 0.4- 080911 048 1.6- 1.0+ 961119 500 0.2+ 0.5- Y 080910 J70 0.1+ 0.4- 080911 048 1.8- 0.4+ 961122 500 1.0+ 0.6- Y 080910 A99 0.2+ 0.6- 080911 048 1.3- 0.4+ 961125 500 1.1+ 0.3- Y 080910 J51 0.6+ 0.3+ 080911 213 0.4- 0.1+ 961128 500 0.1- 0.7- Y 080910 A99 0.5- 0.7- 080911 118 0.1- 0.1- 961201 500 0.0 0.4- Y 080910 J70 0.0 0.6- 080911 118 0.4- 0.1+ 961204 500 0.5+ 0.6- Y 080910 952 0.3- 0.5- 080911 118 0.2- 0.0 961205 500 0.7+ 0.2- Y 080910 J51 0.2- 0.2- 080911 118 0.0 0.0 961207 500 0.3- 0.6- Y 080910 J70 0.3- 0.3+ 080911 J47 0.2- 0.4+ 961210 500 0.7+ 0.2+ Y 080910 J70 0.0 0.5- 080911 J59 0.3- 0.2- 961213 500 0.8+ 0.2- Y 080910 J70 0.1- 0.3- 080911 J59 0.8+ 0.6- 961216 500 0.7+ 0.7- Y 080910 J51 0.6+ 0.1+ 080911 J47 0.1- 0.5+ 961219 500 0.2- 0.0 Y 080910 J51 0.4+ 0.1- 080911 J47 0.0 0.8+ 961222 500 0.4+ 0.3- Y 080910 B40 0.3- 0.1- 080911 J59 0.4+ 0.8- 961225 500 0.7- 0.1- Y 080910 J51 0.9+ 0.1- 080911 J47 0.1- 0.7+ 961228 500 0.9- 0.0 Y 080910 J51 0.7+ 0.1+ 080911 J38 0.0 0.5+ 961231 500 1.0- 0.1+ Y 080910 B40 0.6- 0.7- 080911 J38 0.1- 0.7+ 1897/ 080910 J51 0.3+ 0.1+ 080911 J40 0.2- 0.3+ 970104 500 1.1- 0.3- Y 080910 595 0.4+ 0.0 080911 J38 0.1+ 0.4+ 970105 500 0.5- 0.3- Y 080910 213 0.7- 0.3- 080911 J40 0.1- 0.0 2008/ 080910 B40 1.3+ 1.6- 080911 J40 0.1+ 0.2+ 080910 D89 (3.3+ 1.3-) 080910 213 0.5- 0.4- 080911 J40 0.1- 0.2+ 080910 D89 0.0 0.9- 080910 595 0.1- 0.1+ 080912 D88 1.5+ 0.1+ 080910 D89 0.0 0.7- 080910 B40 0.0 0.5- 080912 D88 1.5+ 0.1- 080910 D89 0.3+ 0.5- 080910 213 0.5- 0.3- 080912 D88 1.2+ 0.3- 080910 D89 0.3- 0.6- 080910 952 0.1- 0.4- 080912 B49 0.0 0.8+ 080910 D89 0.6+ 0.4- 080910 A11 0.9+ 0.1+ 080912 B49 0.1+ 0.5+ 080910 D89 0.5+ 0.8- 080910 A17 0.0 0.8- 080912 B49 0.2+ 0.8+ 080910 D89 0.2- 0.2- 080910 952 0.1+ 0.5- 080912 B40 (3.2+ 1.2+) 080910 D89 0.3+ 0.6- 080910 A17 0.1- 0.6- 080912 B40 1.6+ 0.8- 080910 D89 0.4+ 0.8- 080910 A17 0.2- 0.7- 080913 B49 0.3+ 0.4+ 080910 900 0.3- 0.8- 080910 A11 0.4- 0.2- 080913 B49 0.2- 0.5+ 080910 300 0.1+ 1.2- 080910 J29 0.5+ 0.2+ 080913 B49 0.3- 0.8+ 080910 300 0.4+ 0.0 080910 J29 0.2- 0.0 080913 J20 0.1- 1.1+ 080910 D89 0.1+ 0.3- 080910 J47 0.3+ 0.3+ 080913 J20 0.7- 1.3+ 080910 300 0.1+ 0.6- 080910 J47 0.4+ 0.0 080913 J51 1.1+ 0.7+ 080910 900 0.4- 0.5- 080910 J47 0.6+ 0.2+ 080913 J51 1.0+ 0.6+ 080910 300 0.2+ 0.7- 080910 J47 0.5+ 0.0 080913 J51 1.0+ 0.6+ 080910 300 1.1+ 0.8- 080910 J47 0.3+ 0.0 080914 J45 (0.5- 2.1+) 080910 300 0.1- 0.8- 080910 J29 0.2- 0.2+ 080914 J45 (1.0+ 2.4+) 080910 300 0.6+ 0.9- 080910 J40 0.0 0.0 080914 900 0.7+ 0.9+ 080910 300 0.7+ 0.4- 080910 J40 0.0 0.1+ 080914 900 0.9+ 0.9+ 080910 300 0.0 0.6- 080910 J40 0.2- 0.0 080914 J20 (1.0- 2.1+) 080910 900 0.5- 0.5- 080910 J40 0.3- 0.0 080914 J20 (2.2- 2.4+) 080910 D89 0.4+ 0.3- 080911 H47 0.1- 0.7- 080914 J47 0.3+ 1.1+ 080910 900 0.2- 0.4- 080911 H47 0.7- 0.5- 080914 J47 0.4+ 1.3+ 080910 900 0.2- 0.2- 080911 H47 0.5- 0.3- 080914 J47 0.5+ 1.6+ 080910 D35 0.6- 0.3- 080911 H55 0.6- 0.0 080914 J38 1.1+ 1.1+ 080910 D35 0.4- 1.0- 080911 H55 0.5- 0.2- 080914 J38 0.9+ 0.8+ 080910 D35 0.9- 0.2- 080911 H55 0.5- 0.1- 080914 J38 1.1+ 1.1+ 080910 D35 0.3- 0.5- 080911 H55 0.7- 0.0 080914 213 0.0 1.0+ 080910 D35 0.7- 0.1+ 080911 H55 0.4- 0.1- 080914 213 0.1+ 1.0+ 080910 349 0.2+ 0.3- 080911 H47 0.2- 0.5- 080914 213 0.4- 0.9+ 080910 349 0.1- 0.0 080911 H47 0.4+ 0.1- 080914 945 0.6+ 0.1+ 080910 349 0.4+ 0.1- 080911 H47 0.4- 0.1+ 080914 945 0.6+ 0.5+ 080910 349 0.2+ 0.4- 080911 673 1.3- 0.4+ 080914 945 0.9+ 0.9+ 080910 900 0.3- 0.5- 080911 673 1.4- 0.5+ 080914 945 1.4+ 0.5+ 080910 349 0.0 0.4- 080911 673 1.6- 0.3+ 080914 945 0.8+ 0.6+ 080910 900 0.3- 0.4- 080911 673 1.4- 0.9+ 080914 J40 0.5+ 1.1+ 080910 C42 (5.4+ 2.2+) 080911 E16 0.2- 0.0 080914 J40 0.7+ 0.8+ 080910 C42 (0.7- 3.2-) 080911 379 1.2- 0.2+ 080915 J40 0.4+ 1.1+ 080910 C42 1.2+ 0.1- 080911 379 1.5- 0.8- 080915 J40 1.5+ 1.0+ 080910 235 0.5+ 0.6- 080911 E16 0.3+ 0.2+ 080915 673 0.9- 1.1+ 080910 473 0.7+ 0.6- 080911 900 0.2- 0.1- 080915 673 0.7- 1.3+ 080910 473 0.1+ 0.6- 080911 900 0.0 0.1- 080915 673 0.7- 1.4+ 080910 235 0.8+ 0.5- 080911 379 1.0- 0.2- 080915 673 0.5- 1.4+ 080910 B18 0.8- 0.8- 080911 367 0.2- 0.7- 080910 B18 0.6- 0.5- 080911 367 0.5+ 0.2- ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 2008 Sept. 16