OAA computing section circular NK 514 Periodic Comet Kowal-Vavrova 1983 III
The following improved orbital elements, by S. Nakano, are from 12 observations 1983 May 8 to Sept. 28. Perturbations by all nine planets were taken into account. The mean residual is +/- 2.00 arc seconds. Epoch = 1983 Apr. 16.0 ET T = 1983 Apr. 2.42061 +/- 0.65235 (m.e.) ET Peri. = 19.49681 +/- 0.88726 Node = 201.84717 +/- 0.87042 (1950.0) Inc. = 4.31756 +/- 0.06268 q = 2.6088637 +/- 0.0022646 AU e = 0.5881655 +/- 0.0003075 a = 6.3347387 +/- 0.0028048 AU n_ = 0.06181744 +/- 0.00004106 P = 15.944 +/- 0.0105891 years (+/- 3.87 days) The predicted orbit for the 1998 return is as follows: T = 1998 Nov. 15.18071 ET Epoch = 1998 Nov. 3.0 ET Peri. = 18.96510 e = 0.5866581 Node = 201.54078 (1950.0) a = 6.2351779 AU Inc. = 4.35051 n_= 0.06330395 q = 2.5772605 AU P = 15.569 years The following residuals in seconds of arc are from the above orbital elements: Date/ UT R.A. (1950) Decl. *** O-C *** Code/Obs. h m s ! , " " " 1983 05 08.22917 15 34 04.67 -15 38 07.6 3.0- 1.1+ 675/PL 1983 05 08.28125 15 34 03.45 -15 37 57.6 2.2+ 0.6- 675/PL 1983 05 09.30000 15 33 33.66 -15 34 04.6 2.8- 0.8+ 675/PL 1983 05 09.35208 15 33 32.54 -15 33 55.3 4.3+ 1.7- 675/PL 1983 05 14.94676 15 30 46.04 -15 13 00.8 2.3+ 1.2- 046/KL 1983 05 14.97436 15 30 44.77 -15 12 53.5 3.4- 0.0 046/KL 1983 05 15.25764 15 30 36.41 -15 11 48.7 3.1- 1.6+ 675/PL 1983 05 15.30972 15 30 35.19 -15 11 38.5 3.4+ 0.5+ 675/PL 1983 05 31.87898 15 22 53.50 -14 18 48.1 0.6- 1.4- 046/KL 1983 05 31.89039 15 22 53.30 -14 18 44.3 0.6+ 0.7+ 046/KL 1983 09 28.40793 16 41 20.63 -18 29 20.1 1.7+ 0.1- 413/SS 1983 09 28.42182 16 41 21.58 -18 29 22.3 1.6- 0.3+ 413/SS ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 1987 August 20