OAA computing section circular NK 702 28P/Neujmin 1

The following improved orbital elements, by S. Nakano, are from 113 observations 1913-1999. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 1.11 arc seconds. Epoch = 1984 Oct. 27.0 TT T = 1984 Oct. 8.22029 +/- 0.00040 (m.e.) TT Peri. = 346.83905 +/- 0.00010 Node = 347.04635 +/- 0.00010 (2000.0) Inc. = 14.17980 +/- 0.00003 q = 1.5531563 +/- 0.0000008 AU e = 0.7756086 +/- 0.0000001 a = 6.9216381 +/- 0.0000007 AU n' = 0.05412411 +/- 0.00000001 P = 18.210 +/- 0.0000028 years T = 1913 Aug. 16.92684 TT Epoch = 1913 Aug. 21.0 TT Peri. = 346.23050 e = 0.7754633 Node = 349.11651 (2000.0) a = 6.8081966 AU Inc. = 14.84980 n'= 0.05548249 q = 1.5286903 AU P = 17.764 years T = 1931 Apr. 30.08233 TT Epoch = 1931 May 19.0 TT Peri. = 346.94822 e = 0.7749450 Node = 348.28050 (2000.0) a = 6.7884174 AU Inc. = 15.15653 n'= 0.05572515 q = 1.5277674 AU P = 17.687 years T = 1948 Dec. 15.93426 TT Epoch = 1949 Jan. 4.0 TT Peri. = 346.68349 e = 0.7744263 Node = 347.87460 (2000.0) a = 6.8599158 AU Inc. = 15.00947 n'= 0.05485622 q = 1.5474165 AU P = 17.967 years T = 1966 Dec. 9.39982 TT Epoch = 1966 Dec. 21.0 TT Peri. = 346.80746 e = 0.7748227 Node = 347.88402 (2000.0) a = 6.8505109 AU Inc. = 15.03191 n'= 0.05496923 q = 1.5425792 AU P = 17.930 years The predicted orbit for the 2002 return is as follows: T = 2002 Dec. 27.37822 TT Epoch = 2003 Jan. 1.0 TT Peri. = 346.91901 e = 0.7756269 Node = 347.03390 (2000.0) a = 6.9172797 AU Inc. = 14.18527 n'= 0.05417527 q = 1.5520513 AU P = 18.193 years The following residuals in seconds of arc are from the above orbital elements: 1913/ 311116 754 0.8+ 0.8- 841015 801 1.4- 0.5+ 130909 662 0.5+ 0.8- 311117 672 0.8+ 1.2+ 841018 801 0.4- 0.6- 130910 754 0.9- 1.6- 311205 754 0.6+ 0.5- 841023 323 0.9- 1.8- 130910 662 0.7- 1.1- 311214 672 0.5+ 0.3- 841023 491 1.7+ 1.7+ 130910 754 1.0- 1.7- 1932/ 841024 491 0.5+ 0.1- 130914 662 0.9+ 1.3- 320101 672 0.1- 0.7+ 841025 474 0.1- 0.4+ 130914 754 1.1- 0.0 320104 754 2.2+ 1.2+ 841025 474 0.1+ 0.7+ 130923 662 0.7- 0.3+ 320110 672 0.7+ 1.4+ 841029 491 0.6- 1.1- 130924 754 0.2+ 0.6- 1948/ 841113 056 (1.4- 4.0-) 130924 662 0.2+ 1.0+ 480506 672 0.0 0.0 841119 801 1.4- 1.2- 130928 754 0.8- 0.4+ 480712 821 0.0 2.1- 841123 491 1.4- 0.8- 131001 754 1.0- 1.6+ 480712 821 0.2+ 1.8- 841125 801 1.2- 1.2+ 131002 662 0.3- 1.1+ 480903 711 1.0+ 0.5- 841217 801 0.2+ 0.4+ 131006 754 0.4- 0.5- 480904 711 1.5+ 0.2- 1985/ 131008 754 0.9+ 1.8+ 480905 711 0.4+ 0.2- 850123 801 0.9- 0.4+ 131013 754 1.2- 0.5+ 480905 711 2.5+ 0.1- 850216 801 0.8- 0.2- 131018 662 1.2- 0.1- 481130 754 (4.8- 4.2-) 850220 801 2.2- 0.7- 131027 662 0.0 0.5+ 481203 821 0.5+ 0.1+ 1986/ 131102 754 (4.1+ 1.2+) 1966/ 860306 695 1.6- 2.1- 131102 754 (3.4+ 1.9+) 660516 074 1.4+ 0.6- 860306 695 1.9- 0.9- 131103 754 (2.8+ 1.1+) 660516 074 0.1- 1.6- 861030 695 1.3- 1.4- 131109 754 1.7+ 0.7+ 660517 074 0.9- 0.7- 861030 695 0.1+ 0.4+ 131116 754 (2.8+ 0.4-) 660517 074 (3.3+ 0.2-) 861101 695 0.2- 1.7+ 131116 662 1.1+ 0.1- 660524 074 1.1+ 2.2+ 1988/ 131116 662 1.3+ 0.5+ 660526 074 0.6+ 0.9+ 880517 568 1.9+ 1.0- 131116 754 (3.0+ 0.1-) 660623 821 1.6- 0.4+ 881209 568 1.7- 1.5+ 131117 754 (4.5+ 0.8-) 660624 821 2.0- 0.3+ 881209 568 1.2- 1.0+ 131117 662 (1.1+ 3.0+) 1984/ 881209 568 1.3- 1.1+ 131217 754 0.4+ 0.4- 840226 474 0.7- 2.6- 881209 568 1.8- 0.4+ 131221 754 2.1+ 0.9+ 840226 474 1.1- 0.2- 1989/ 131222 754 2.3+ 0.5+ 840227 323 2.6+ 2.0+ 890209 568 0.9+ 0.8+ 131231 754 1.6+ 1.2- 840423 474 (3.2+ 2.0-) 890209 568 1.3- 0.8+ 1931/ 840423 474 (2.9+ 2.4-) 890406 807 1.4- 1.0+ 310917 672 (3.3- 0.1+) 840526 474 0.6- 0.5+ 890411 695 0.9- 1.9+ 310918 672 (1.9+ 3.0-) 840526 474 0.3- 0.1- 890411 695 1.4- 1.1+ 310918 672 2.3+ 0.9+ 840607 323 0.0 0.6+ 891227 568 1.0- 0.8+ 311009 754 (3.8+ 3.7+) 840625 323 0.9+ 0.5+ 891227 568 0.4- 0.7+ 311013 672 1.3+ 0.7+ 840724 323 2.1+ 1.6- 1997/ 311016 754 2.2+ 1.7- 840725 474 1.1+ 0.7+ 971230 568 1.3- 0.4- 311017 754 (0.1- 3.0+) 840725 474 1.1+ 0.7+ 971230 568 1.2- 0.1- 311017 662 0.7+ 2.0+ 840803 323 1.3+ 0.9+ 1999/ 311017 662 0.4+ 1.8+ 840825 474 0.3- 1.1- 990213 693 1.0- 0.6- 311018 754 0.3+ 0.1- 840825 474 0.2- 1.1- 990213 693 1.2- 0.9- 311105 754 0.3- 1.0- 840828 323 1.4- 1.0- 990213 693 0.3- 0.3- 311105 754 0.8- 0.2+ 840829 323 2.1+ 0.1- 990214 693 (2.4- 0.4+) 311106 754 0.2- 0.1+ 840923 474 1.6- 1.8+ 990214 693 1.0- 0.5+ 311106 754 0.6+ 1.1+ 840923 474 2.1- 0.6+ 990214 693 1.5- 0.3+ 311116 754 0.3+ 0.6+ 840924 323 (1.1- 4.3+) ( ) -------- Rejected Obs.

Director, Computing Section Syuichi Nakano 1999 Nov. 1

Back to Nakano Note Page