OAA computing section circular NK 644 106P/Schuster
The following improved orbital elements, by S. Nakano, are from 72 observations 1977-1992. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.85 arc second. Epoch = 1992 Sept.15.0 TT T = 1992 Sept. 6.41769 +/- 0.00036 (m.e.) TT Peri. = 355.73176 +/- 0.00021 Node = 50.60201 +/- 0.00009 (2000.0) Inc. = 20.13390 +/- 0.00004 q = 1.5392427 +/- 0.0000021 AU e = 0.5895196 +/- 0.0000005 a = 3.7498569 +/- 0.0000018 AU n' = 0.13573193 +/- 0.00000010 P = 7.261 +/- 0.0000053 years T = 1978 Jan. 6.81375 TT Epoch = 1978 Jan. 12.0 TT Peri. = 353.92885 e = 0.5740258 Node = 51.52067 (2000.0) a = 3.8208586 AU Inc. = 20.44754 n'= 0.13196618 q = 1.6275873 AU P = 7.469 years T = 1985 June 2.53012 TT Epoch = 1985 May 15.0 TT Peri. = 355.62959 e = 0.5902370 Node = 50.67377 (2000.0) a = 3.7448934 AU Inc. = 20.15276 n'= 0.13600187 q = 1.5345186 AU P = 7.247 years The predicted orbit for the 1999 return is as follows: T = 1999 Dec. 16.21585 TT Epoch = 1999 Dec. 8.0 TT Peri. = 355.85953 e = 0.5879191 Node = 50.58945 (2000.0) a = 3.7607345 AU Inc. = 20.13877 n'= 0.13514347 q = 1.5497269 AU P = 7.293 years The following residuals in seconds of arc are from the above orbital elements: 770905 809 (2.0+ 2.6+) 771113 809 0.0 0.6- 920929 033 (5.0- 0.6+) 770906 809 0.7+ 0.8+ 771114 805 0.2+ 0.6+ 921001 801 0.9- 1.5+ 770906 809 1.4+ 1.0+ 771116 805 2.3- 1.2+ 921001 801 0.0 0.5+ 770907 809 0.8+ 1.2+ 771203 809 0.5- 1.0+ 921022 691 0.3- 0.0 770907 809 1.4- 0.2+ 771203 809 0.8- 0.2- 921022 691 1.0- 0.6+ 770907 809 0.8- 0.4+ 771203 879 1.0- 0.3+ 921023 801 1.2+ 0.8- 770911 809 0.2- 0.1- 771204 323 0.4- 0.9- 921023 801 0.7- 0.6+ 770916 413 (2.9- 3.5+) 780102 323 0.3+ 0.9+ 921025 360 0.3+ 0.3+ 771009 809 1.0+ 0.9- 780108 809 1.2+ 1.5+ 921025 360 1.2+ 0.1- 771010 809 0.2+ 1.1- 920728 372 (5.1- 0.9-) 921028 801 (2.8+ 0.4-) 771010 809 0.4+ 0.1+ 920728 372 (2.6- 0.9-) 921028 801 1.0+ 0.1+ 771011 809 0.8+ 0.7- 920729 372 (6.9- 0.8-) 921030 411 0.8- 1.3- 771012 809 1.0+ 0.4- 920729 372 (5.8- 2.7-) 921030 411 1.3- 0.2- 771013 809 0.0 0.3- 920825 801 (2.7+ 0.4+) 921102 033 1.0+ 0.6+ 771013 809 0.9+ 0.1- 920825 801 1.0- 0.3+ 921102 033 1.5+ 0.8+ 771013 809 1.2+ 1.1- 920827 657 0.0 0.8+ 921102 033 0.3- 0.0 771014 809 0.7+ 0.4- 920827 657 0.7+ 0.7+ 921102 033 0.5+ 0.6- 771015 809 0.6+ 1.1- 920828 657 1.3+ 1.2+ 921121 411 0.0 0.0 771015 809 1.0- 0.5+ 920828 657 0.5- 0.1- 921121 411 1.2- 0.5- 771016 809 0.7- 0.4- 920828 657 0.2+ 0.7+ 921124 360 0.4+ 0.1+ 771017 809 0.0 0.7- 920905 411 2.4- 2.1- 921124 360 0.1- 0.7- 771019 805 0.2- 0.9+ 920905 411 0.6- 0.4- 921130 360 0.2- 0.4- 771031 323 1.0- 0.4- 920905 411 1.2- 0.1- 921130 360 0.4- 0.1- 771108 809 0.3+ 0.5- 920925 801 0.9- 0.2+ 921201 691 0.7- 0.8- 771110 809 0.6- 1.8- 920925 801 0.1- 0.7+ 921201 691 1.0- 0.6- 771110 809 0.2- 1.3- 920925 360 2.1+ 0.7+ 921201 691 0.5- 0.9- 771111 808 1.6- 0.0 920925 360 1.3+ 0.5+ 921218 596 (7.3- 0.2-) 771111 808 0.2+ 0.8+ 920929 033 (2.7+ 0.7+) 921218 596(10.9- 2.7+) ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 1996 Apr. 11