OAA computing section circular NK 798 28P/Neujmin 1
The following improved orbital elements, by S. Nakano, are from 122 observations 1913-2001. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 1.10 arc seconds. See an orbit on NK 702. Epoch = 2003 Jan. 1.0 TT T = 2002 Dec. 27.37867 +/- 0.00035 (m.e.) TT Peri. = 346.91894 +/- 0.00010 Node = 347.03390 +/- 0.00009 (2000.0) Inc. = 14.18527 +/- 0.00003 q = 1.5520508 +/- 0.0000008 AU e = 0.7756270 +/- 0.0000001 a = 6.9172802 +/- 0.0000007 AU n' = 0.05417526 +/- 0.00000001 P = 18.193 +/- 0.0000027 years T = 1913 Aug. 16.92678 TT Epoch = 1913 Aug. 21.0 TT Peri. = 346.23044 e = 0.7754634 Node = 349.11651 (2000.0) a = 6.8081966 AU Inc. = 14.84980 n'= 0.05548249 q = 1.5286894 AU P = 17.764 years T = 1931 Apr. 30.08231 TT Epoch = 1931 May 19.0 TT Peri. = 346.94817 e = 0.7749451 Node = 348.28050 (2000.0) a = 6.7884174 AU Inc. = 15.15652 n'= 0.05572515 q = 1.5277665 AU P = 17.687 years T = 1948 Dec. 15.93430 TT Epoch = 1949 Jan. 4.0 TT Peri. = 346.68344 e = 0.7744264 Node = 347.87459 (2000.0) a = 6.8599157 AU Inc. = 15.00946 n'= 0.05485622 q = 1.5474156 AU P = 17.967 years T = 1966 Dec. 9.39975 TT Epoch = 1966 Dec. 21.0 TT Peri. = 346.80740 e = 0.7748229 Node = 347.88402 (2000.0) a = 6.8505108 AU Inc. = 15.03191 n'= 0.05496923 q = 1.5425784 AU P = 17.930 years T = 1984 Oct. 8.22015 TT Epoch = 1984 Oct. 27.0 TT Peri. = 346.83898 e = 0.7756086 Node = 347.04636 (2000.0) a = 6.9216385 AU Inc. = 14.17980 n'= 0.05412410 q = 1.5531558 AU P = 18.210 years The predicted orbit for the 2021 return is as follows: T = 2021 Mar. 11.87201 TT Epoch = 2021 Mar. 7.0 TT Peri. = 347.41064 e = 0.7738905 Node = 346.33290 (2000.0) a = 6.9800485 AU Inc. = 14.31162 n'= 0.05344615 q = 1.5782554 AU P = 18.441 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 1913/ 1932/ 841113 056 (1.5- 4.1-) 130909 662 0.4+ 0.8- 320101 672 0.1- 0.8+ 841119 801 1.6- 1.3- 130910 754 0.9- 1.6- 320104 754 2.3+ 1.3+ 841123 491 1.6- 0.9- 130910 662 0.7- 1.1- 320110 672 0.8+ 1.5+ 841125 801 1.3- 1.1+ 130910 754 1.0- 1.7- 1948/ 841217 801 0.1+ 0.3+ 130914 662 0.9+ 1.3- 480506 672 0.5+ 0.2- 1985/ 130914 754 1.1- 0.0 480712 821 0.5+ 2.4- 850123 801 1.0- 0.4+ 130923 662 0.7- 0.2+ 480712 821 0.6+ 2.1- 850216 801 0.8- 0.3- 130924 754 0.1+ 0.7- 480903 711 1.4+ 0.7- 850220 801 2.2- 0.7- 130924 662 0.2+ 1.0+ 480904 711 1.9+ 0.3- 1986/ 130928 754 0.8- 0.4+ 480905 711 0.7+ 0.3- 860306 695 1.4- 2.1- 131001 754 1.1- 1.6+ 480905 711 (2.8+ 0.2-) 860306 695 1.8- 0.9- 131002 662 0.4- 1.1+ 481130 754 (4.6- 4.1-) 861030 695 1.2- 1.5- 131006 754 0.4- 0.6- 481203 821 0.8+ 0.2+ 861030 695 0.2+ 0.3+ 131008 754 0.8+ 1.7+ 1966/ 861101 695 0.0 1.6+ 131013 754 1.2- 0.5+ 660516 074 1.8+ 0.7- 1988/ 131018 662 1.2- 0.1- 660516 074 0.2+ 1.7- 880517 568 2.0+ 1.1- 131027 662 0.0 0.5+ 660517 074 0.5- 0.8- 881209 568 1.5- 1.4+ 131102 754 (4.1+ 1.2+) 660517 074 (3.7+ 0.3-) 881209 568 1.0- 0.9+ 131102 754 (3.4+ 1.9+) 660524 074 1.5+ 2.0+ 881209 568 1.1- 1.0+ 131103 754 (2.8+ 1.1+) 660526 074 1.0+ 0.8+ 881209 568 1.6- 0.3+ 131109 754 1.6+ 0.7+ 660623 821 1.2- 0.3+ 1989/ 131116 754 (2.8+ 0.4-) 660624 821 1.6- 0.1+ 890209 568 1.1+ 0.7+ 131116 662 1.1+ 0.1- 1984/ 890209 568 1.1- 0.7+ 131116 662 1.2+ 0.5+ 840226 474 0.6- 2.6- 890406 807 1.2- 0.9+ 131116 754 (3.0+ 0.2-) 840226 474 1.0- 0.2- 890411 695 0.7- 1.8+ 131117 754 (4.5+ 0.8-) 840227 323 2.7+ 2.0+ 890411 695 1.2- 1.1+ 131117 662 (1.0+ 3.0+) 840423 474 (3.4+ 2.0-) 891227 568 0.8- 0.7+ 131217 754 0.4+ 0.4- 840423 474 (3.0+ 2.3-) 891227 568 0.3- 0.6+ 131221 754 2.1+ 0.9+ 840526 474 0.5- 0.6+ 1997/ 131222 754 2.3+ 0.5+ 840526 474 0.2- 0.1- 971230 568 1.1- 0.5- 131231 754 1.6+ 1.2- 840607 323 0.1+ 0.7+ 971230 568 1.0- 0.2- 1931/ 840625 323 1.0+ 0.5+ 1999/ 310917 672 (3.3- 0.2+) 840724 323 2.2+ 1.6- 990213 693 0.7- 0.7- 310918 672 (1.9+ 2.9-) 840725 474 1.2+ 0.8+ 990213 693 1.0- 1.1- 310918 672 2.3+ 0.9+ 840725 474 1.2+ 0.7+ 990213 693 0.1- 0.5- 311009 754 (3.9+ 3.7+) 840803 323 1.4+ 1.0+ 990214 693 2.2- 0.3+ 311013 672 1.4+ 0.7+ 840825 474 0.3- 1.1- 990214 693 0.8- 0.3+ 311016 754 2.3+ 1.7- 840825 474 0.2- 1.0- 990214 693 1.3- 0.1+ 311017 754 (0.0 3.0+) 840828 323 1.4- 1.0- 2000/ 311017 662 0.8+ 2.0+ 840829 323 2.2+ 0.1- 000501 695 0.4- 0.0 311017 662 0.5+ 1.9+ 840923 474 1.7- 1.7+ 000501 695 1.0- 0.0 311018 754 0.4+ 0.0 840923 474 2.2- 0.5+ 000501 695 1.1- 0.0 311105 754 0.2- 0.9- 840924 323 (1.1- 4.2+) 2001/ 311105 754 0.7- 0.3+ 841015 801 1.5- 0.5+ 010226 867 1.8- 0.1- 311106 754 0.1- 0.1+ 841018 801 0.5- 0.6- 010226 867 1.2- 0.1+ 311106 754 0.6+ 1.2+ 841023 323 1.0- 1.8- 010226 867 1.6- 1.0+ 311116 754 0.4+ 0.7+ 841023 491 1.6+ 1.7+ 010321 867 1.5- 0.5+ 311116 754 0.9+ 0.7- 841024 491 0.4+ 0.2- 010321 867 0.4- 0.9- 311117 672 0.9+ 1.2+ 841025 474 0.3- 0.4+ 010321 867 0.0 0.4+ 311205 754 0.7+ 0.4- 841025 474 0.0 0.7+ 311214 672 0.6+ 0.2- 841029 491 0.7- 1.2- ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 2001 May 1