OAA computing section circular NK 559 Periodic Comet Shoemaker-Levy 3 (1991e)
The following improved orbital elements, by S. Nakano, are from 21 observations 1991 Feb. 8 to May 3. Perturbations by all nine planets and five minor planets were taken into account. The mean residual is +/- 0.76 arc second. Epoch = 1990 Dec. 15.0 TT T = 1990 Dec. 12.75590 +/- 0.47073 (m.e.) TT Peri. = 181.77489 +/- 0.46729 Node = 303.76373 +/- 0.45983 (2000.0) Inc. = 5.01701 +/- 0.04915 q = 2.8104195 +/- 0.0005037 AU e = 0.2498442 +/- 0.0000381 a = 3.7464478 +/- 0.0006439 AU nß = 0.13591724 +/- 0.00003504 P = 7.252 +/- 0.0018694 years (+/- 0.68 day) The predicted orbit for the 1998 return is as follows: T = 1998 Mar. 3.92795 TT Epoch = 1998 Mar. 8.0 TT Peri. = 181.14245 e = 0.2480816 Node = 303.71637 (2000.0) a = 3.7460313 AU Inc. = 5.00995 nß= 0.13593991 q = 2.8167098 AU P = 7.250 years The following residuals in seconds of arc are from the above orbital elements: Date/ UT R.A. (2000) Decl. *** O-C *** Code/Obs. h m s ¡ , " " " 1991 02 07.34149 09 22 54.63 +13 15 25.9 ( 3.8- 1.3+) 675/PL 1991 02 08.26041 09 22 12.15 +13 17 03.1 0.2- 0.7+ 675/PL 1991 02 08.33216 09 22 07.97 +13 17 10.9 (10.2- 0.6+) 693/CT 1991 02 09.17072 09 21 29.64 +13 18 39.2 0.5- 0.1- 801/HO 1991 02 09.19856 09 21 28.30 +13 18 42.3 0.5- 0.0 801/HO 1991 02 09.36041 09 21 20.56 +13 18 59.5 0.5- 0.3+ 801/HO 1991 02 09.49549 09 21 14.28 +13 19 18.1 ( 6.1- 3.7+) 402/DY 1991 02 09.51215 09 21 13.08 +13 19 19.3 (12.1- 3.1+) 402/DY 1991 02 10.15613 09 20 43.83 +13 20 25.6 0.4- 0.6+ 801/HO 1991 02 10.17293 09 20 43.02 +13 20 27.2 0.5- 0.4+ 801/HO 1991 02 10.56528 09 20 24.96 +13 21 14.1 1.8+ 0.5- 413/SS 1991 02 10.65556 09 20 20.27 +13 21 19.2 ( 4.3- 0.1-) 372/sk 1991 02 10.71111 09 20 17.67 +13 21 23.3 ( 3.4- 1.9-) 372/sk 1991 02 11.17399 09 19 56.63 +13 22 14.8 0.1- 0.5+ 801/HO 1991 02 11.29214 09 19 51.06 +13 22 27.1 0.8+ 0.2+ 801/HO 1991 02 11.31944 09 19 49.91 +13 22 29.2 0.4+ 1.5- 675/PL 1991 02 11.47634 09 19 42.86 +13 22 51.6 0.8+ 0.7- 413/SS 1991 02 12.28321 09 19 05.30 +13 24 12.8 0.1- 0.4- 801/HO 1991 02 12.30396 09 19 04.30 +13 24 16.3 0.4- 1.0+ 801/HO 1991 02 12.52431 09 18 54.52 +13 24 38.3 0.1+ 1.3- 372/sk - continued - P/Shoemaker-Levy 3 NK 559 - 2 Date/ UT R.A. (2000) Decl. *** O-C *** Code/Obs. h m s ¡ , " " " 1991 02 17.14657 09 15 26.28 +13 32 44.9 0.3- 0.4+ 801/HO 1991 02 17.16405 09 15 25.47 +13 32 46.5 0.5- 0.2+ 801/HO 1991 04 14.17188 09 04 30.96 +13 32 51.6 1.3- 0.1+ 675/PL 1991 04 14.20781 09 04 31.86 +13 32 46.2 1.1- 0.6- 675/PL 1991 04 15.14670 09 04 56.88 +13 30 42.3 1.5+ 0.4- 675/PL 1991 04 15.18732 09 04 57.91 +13 30 38.9 1.3+ 1.7+ 675/PL 1991 04 30.48229 09 14 01.36 +12 46 56.3 (10.2- 1.5+) 372/sk 1991 05 03.47500 09 16 16.20 +12 36 13.7 0.3- 0.7- 372/sk 1991 05 05.51597 09 17 51.83 +12 28 33.6 ( 6.6- 0.6-) 372/sk ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 1991 December 23