OAA computing section circular NK 552 Periodic Comet Shoemaker-Levy 1 (1991o)
The following improved orbital elements, by S. Nakano, are from 34 observations 1990 Oct. 24 to 1991 Jan. 18. Perturbations by all nine planets and five minor planets were taken into account. The mean residual is +/- 0.90 arc seconds. Epoch = 1990 Sept.26.0 ET T = 1990 Sept.18.58678 +/- 0.00196 (m.e.) ET Peri. = 310.60473 +/- 0.00233 Node = 51.35870 +/- 0.00228 (1950.0) Inc. = 24.32841 +/- 0.00096 q = 1.5239936 +/- 0.0005261 AU e = 0.7717860 +/- 0.0000540 a = 6.6779146 +/- 0.0016774 AU nß = 0.05711403 +/- 0.00002152 P = 17.257 +/- 0.0065020 years (+/- 2.37 day) The predicted orbit for the 2007 return is as follows: T = 2007 Dec. 10.30832 ET Epoch = 2007 Dec. 6.0 ET Peri. = 312.65490 e = 0.7731958 Node = 50.97335 (1950.0) a = 6.4632976 AU Inc. = 24.55282 nß= 0.05998226 q = 1.4659028 AU P = 16.432 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 ¡ , " " " 1990 10 24.59975 02 10 22.6 -14 24 58 0.0 0.5- 897/kj Y 1990 11 10.55809 01 52 15.5 -03 21 27 ( 3.5+ 4.5-) 897/kj Y 1990 11 10.56147 01 52 14.9 -03 21 17 ( 2.8- 2.2-) 897/kj Y 1990 11 15.31909 01 48 49.29 -00 24 31.5 1.2- 0.1+ 675/PL 1990 11 16.27256 01 48 14.82 +00 09 47.4 ( 0.2- 2.6-) 675/PL 1990 11 16.30313 01 48 13.59 +00 10 54.2 0.7- 1.5- 675/PL 1990 11 17.20220 01 47 42.92 +00 42 57.0 0.5- 0.8+ 801/HO 1990 11 17.20500 01 47 42.83 +00 43 03.0 0.3- 0.8+ 801/HO 1990 11 17.20690 01 47 42.77 +00 43 07.0 0.2- 0.8+ 801/HO 1990 11 17.26458 01 47 40.97 +00 45 09.7 2.1- 0.6- 675/PL 1990 11 17.53160 01 47 32.59 +00 54 39.2 ( 0.6+ 2.9+) 402/DY 1990 11 17.54348 01 47 32.21 +00 55 02.2 1.3+ 0.7+ 402/DY 1990 11 18.27309 01 47 09.40 +01 20 35.4 1.2+ 1.6- 657/VC 1990 11 18.43299 01 47 04.99 +01 26 14.5 0.7+ 0.3+ 373/ts 1990 11 18.45081 01 47 04.34 +01 26 52.5 0.2- 1.0+ 373/ts 1990 11 18.55000 01 47 01.08 +01 30 20.2 0.5+ 1.1+ 372/sk 1990 11 18.56430 01 47 00.71 +01 30 49.0 2.2+ 0.0 372/sk 1990 11 20.12506 01 46 17.46 +02 24 34.3 0.1+ 1.1- 801/HO 1990 11 20.13807 01 46 17.08 +02 25 02.4 0.1+ 0.4+ 801/HO 1990 11 20.40295 01 46 10.18 +02 33 57.8 ( 1.8+ 4.2-) 657/VC - continued - P/Shoemaker-Levy 1 NK 552 - 2 Date/ UT R.A. (1950) Decl. *** O-C *** Code/Obs. h m s ¡ , " " " 1990 11 20.86852 01 45 59.22 +02 49 48.4 0.1- 0.7+ 494/mn 1990 11 20.90451 01 45 58.31 +02 51 01.0 0.5+ 0.3+ 984/ri 1990 11 20.97943 01 45 56.90 +02 53 33.5 0.6+ 0.1+ 801/HO 1990 11 20.98100 01 45 56.79 +02 53 36.0 0.5- 0.6- 801/HO 1990 11 21.56076 01 45 42.95 +03 13 06.0 1.4- 0.7+ 897/kj 1990 11 21.56713 01 45 43.02 +03 13 20.7 ( 2.1+ 2.7+) 897/kj 1990 11 21.60139 01 45 42.05 +03 14 26.6 0.0 0.5- 372/sk 1990 11 23.48675 01 45 05.47 +04 16 33.7 1.9+ 0.7- 897/kj 1990 11 23.51782 01 45 04.63 +04 17 36.4 1.0- 1.4+ 897/kj 1990 12 06.48472 01 44 42.58 +10 37 41.6 1.0+ 0.0 372/sk 1990 12 06.50556 01 44 42.69 +10 38 12.3 0.4- 2.1- 372/sk 1990 12 06.50770 01 44 42.79 +10 38 18.2 1.0+ 0.5+ 373/ts 1990 12 06.51881 01 44 42.79 +10 38 35.8 0.7- 0.7+ 373/ts 1990 12 06.74502 01 44 46.35 +10 44 35.2 ( 3.1+ 7.1+) 046/KL 1990 12 06.75920 01 44 46.40 +10 45 01.1 ( 1.5+ 10.8+) 046/KL 1990 12 07.74145 01 45 00.56 +11 10 14.3 2.1- 1.3- 046/KL 1990 12 07.75273 01 45 00.86 +11 10 31.5 0.1+ 1.5- 046/KL 1990 12 08.74127 01 45 17.48 +11 35 46.9 ( 1.1+ 5.1+) 046/KL 1990 12 08.75273 01 45 17.82 +11 36 04.7 ( 3.5+ 5.6+) 046/KL 1990 12 14.04054 01 47 19.67 +13 43 26.8 0.1- 0.3+ 801/HO 1990 12 14.05219 01 47 20.00 +13 43 42.8 0.3+ 0.2+ 801/HO 1990 12 15.05112 01 47 49.24 +14 06 30.6 0.0 0.0 801/HO 1991 01 05.86417 02 05 19.17 +21 02 00.0 (11.3- 10.4-) 540/LZ 1991 01 05.89514 02 05 21.80 +21 02 36.8 ( 1.4- 3.2-) 540/LZ 1991 01 18.05331 02 19 36.92 +24 02 01.5 0.1+ 0.3+ 801/HO 1991 01 18.05922 02 19 37.36 +24 02 06.7 0.1+ 0.7+ 801/HO ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 1991 August 27