OAA computing section circular NK 1018 42P/Neujmin 3
The following improved orbital elements, by S. Nakano, are from 46 observations 1972 to 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 +/- 0.69 arc second. See orbits in NK 540 and NK 788. Epoch = 2004 July 14.0 TT T = 2004 July 15.88165 +/- 0.01457 (m.e.) TT Peri. = 147.15092 +/- 0.00211 Node = 150.38413 +/- 0.00038 (2000.0) Inc. = 3.98539 +/- 0.00003 q = 2.0148249 +/- 0.0000136 AU e = 0.5850670 +/- 0.0000057 a = 4.8557831 +/- 0.0000153 AU n' = 0.09211178 +/- 0.00000044 P = 10.700 +/- 0.0000506 years A1 = +3.552 +/- 0.541 A2 = +0.07404 +/- 0.01152 T = 1972 May 16.52808 TT Epoch = 1972 May 3.0 TT Peri. = 146.96528 e = 0.5896968 Node = 150.85819 (2000.0) a = 4.8166290 AU Inc. = 3.88086 n'= 0.09323721 q = 1.9762785 AU P = 10.571 years [ T = 1982 Dec. 6.03100 TT Epoch = 1982 Dec. 17.0 TT Peri. = 145.19268 e = 0.5813322 Node = 150.34738 (2000.0) a = 4.9190522 AU Inc. = 3.93122 n'= 0.09034038 q = 2.0594487 AU P = 10.910 years ] T = 1993 Nov. 13.04741 TT Epoch = 1993 Nov. 29.0 TT Peri. = 147.00804 e = 0.5860243 Node = 150.42443 (2000.0) a = 4.8343219 AU Inc. = 3.98674 n'= 0.09272583 q = 2.0012916 AU P = 10.629 years The predicted orbit for the 2015 return is as follows: T = 2015 Apr. 8.09675 TT Epoch = 2015 Apr. 8.0 TT Peri. = 147.12030 e = 0.5840837 Node = 150.28050 (2000.0) a = 4.8761092 AU Inc. = 3.98440 n'= 0.09153642 q = 2.0280533 AU P = 10.767 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 1972/ 720814 801 0.1+ 0.7+ 930721 691 0.2- 0.5+ 720417 691 (0.4- 4.3+)Y 720814 691 0.5- 0.7+ 930721 691 1.0+ 1.0+ 720417 691 0.7- 0.4- 720814 691 0.6- 0.5+ 930724 691 0.2+ 0.3- 720513 805 0.7+ 1.0+ 720816 801 1.0+ 1.5+ 930724 691 0.4+ 0.3- 720616 821 0.5- 0.4- 720820 801 2.1+ 0.3- 930724 691 0.2+ 0.2- 720616 821 0.0 0.4- 720912 691 1.0- 0.1+ 930725 691 (0.5- 2.1-) 720617 821 1.5+ 1.1+ 720912 691 0.9- 0.2- 930725 691 0.1+ 0.6+ 720617 821 0.6- 0.1+ 1993/ 930725 691 0.2+ 0.1- 720619 821 0.2+ 0.4+ 930525 691 0.1+ 0.6+ 930816 691 0.2- 0.2+ 720619 821 0.9- 0.0 930525 691 0.8- 0.5- 930816 691 0.6- 0.0 720708 821 0.9- 0.4- 930526 691 0.9- 1.0- 930816 691 0.7- 0.1+ 720708 821 0.1+ 0.5- 930526 691 0.3- 0.3+ 2003/ 720709 821 0.3+ 0.3- 930526 691 0.5- 0.1- 030312 568 0.2- 1.0+ 720709 821 1.4- 0.0 930623 691 1.7+ 0.4- 030501 568 1.0+ 0.0 720714 691 0.9+ 0.8- 930623 691 0.1+ 0.1+ 030501 568 0.3+ 0.6+ 720714 691 1.0+ 0.5- 930623 691 0.9- 0.0 030527 568 0.4- 0.2- 720812 801 0.2- 1.5- 930721 691 1.3+ 0.6- 030528 568 0.3- 0.0 ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 2003 Dec. 9