OAA computing section circular NK 508 Periodic Comet Schuster 1978 I
The following improved orbital elements, by S. Nakano, are from 36 observations 1977 Sept. 5 to 1978 Jan. 8. Perturbations by all nine planets were taken into account. The mean residual is +/- 0.77 arc second: Epoch = 1978 Jan. 12.0 ET T = 1978 Jan. 6.81674 +/- 0.00060 (m.e.) ET Peri. = 353.91620 +/- 0.00101 Node = 50.83704 +/- 0.00099 (1950.0) Inc. = 20.44376 +/- 0.00032 q = 1.6275448 +/- 0.0001357 AU e = 0.5740334 +/- 0.0000244 a = 3.8208272 +/- 0.0002316 AU n_ = 0.13196780 +/- 0.00001200 P = 7.469 +/- 0.0006790 years (+/- 0.25 day) The predicted orbit for the 1992 return is as follows: T = 1992 Sept. 6.38807 ET Epoch = 1992 Sept.15.0 ET Peri. = 355.71827 e = 0.5895205 Node = 49.91892 (1950.0) a = 3.7498493 AU Inc. = 20.13032 n_= 0.13573235 q = 1.5392363 AU P = 7.261 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 ! , " " " 1977 09 05.20811 00 08 57.38 -38 50 54.4 1.5+ 1.7+ 809/ES 1977 09 06.13542 00 08 11.48 -38 55 33.4 0.1+ 0.0 809/ES 1977 09 06.23549 00 08 06.14 -38 56 03.1 0.8+ 0.2+ 809/ES 1977 09 07.13858 00 07 19.90 -39 00 12.8 0.2+ 0.3+ 809/ES 1977 09 07.24792 00 07 13.60 -39 00 43.7 2.0- 0.6- 809/ES 1977 09 07.28470 00 07 11.58 -39 00 53.0 1.4- 0.4- 809/ES 1977 09 11.12835 00 03 37.57 -39 14 46.8 0.8- 0.8- 809/ES 1977 09 16.54913 23 57 59.21 -39 22 52.4 ( 3.4- 3.0+) 413/SS 1977 10 09.16424 23 33 33.39 -36 59 39.8 0.8+ 0.8- 809/ES 1977 10 10.27770 23 32 33.66 -36 44 49.6 0.0 0.9- 809/ES 1977 10 10.31771 23 32 31.52 -36 44 14.6 0.2+ 0.4+ 809/ES 1977 10 11.08868 23 31 52.62 -36 33 37.3 0.6+ 0.4- 809/ES 1977 10 12.08872 23 31 02.91 -36 19 16.3 0.8+ 0.2- 809/ES 1977 10 13.07698 23 30 15.72 -36 04 33.2 0.1- 0.1- 809/ES 1977 10 13.17431 23 30 10.89 -36 03 04.1 0.8+ 0.2+ 809/ES 1977 10 13.25556 23 30 06.89 -36 01 49.6 1.1+ 0.8- 809/ES 1977 10 14.03893 23 29 31.98 -35 49 43.1 0.6+ 0.1- 809/ES 1977 10 15.03967 23 28 48.39 -35 33 47.0 0.5+ 0.8- 809/ES 1977 10 15.26059 23 28 38.18 -35 30 08.6 1.1- 0.8+ 809/ES 1977 10 16.08229 23 28 05.10 -35 16 36.5 0.8- 0.0 809/ES - continued - P/Schuster NK 508 - 2 Date/ UT R.A. (1950) Decl. *** O-C *** Code/Obs. h m s ! , " " " 1977 10 17.11385 23 27 24.91 -34 59 05.1 0.1- 0.2- 809/ES 1977 10 19.15567 23 26 12.75 -34 22 48.4 0.1- 1.3+ 805/EL 1977 10 31.55417 23 22 38.42 -30 04 19.5 0.8- 0.0 323/PR 1977 11 08.09325 23 23 36.97 -27 01 14.6 0.7+ 0.1- 809/ES 1977 11 10.02962 23 24 14.50 -26 11 48.3 0.2- 1.4- 809/ES 1977 11 10.07117 23 24 15.29 -26 10 43.4 0.2+ 0.8- 809/ES 1977 11 11.06232 23 24 37.88 -25 45 02.1 1.2- 0.4+ 808/YS 1977 11 11.12535 23 24 39.35 -25 43 22.5 0.6+ 1.2+ 808/YS 1977 11 13.04012 23 25 30.15 -24 53 12.8 0.4+ 0.1- 809/ES 1977 11 14.10593 23 26 01.76 -24 24 55.1 0.7+ 1.1+ 805/EL 1977 11 16.12398 23 27 08.66 -23 30 49.2 1.8- 1.6+ 805/EL 1977 12 03.04785 23 41 51.68 -15 36 17.3 0.0 0.8+ 809/ES 1977 12 03.11710 23 41 56.16 -15 34 18.4 0.4- 0.3- 809/ES 1977 12 03.43194 23 42 17.68 -15 25 21.9 0.6- 0.2+ 879/fr 1977 12 04.52083 23 43 32.44 -14 53 51.9 0.1- 1.1- 323/PR 1978 01 02.54514 00 26 36.79 -00 55 48.1 0.1+ 0.5- 323/PR 1978 01 08.04997 00 36 32.72 +01 38 52.5 0.7+ 0.2- 809/ES ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 1987 August 20