OAA computing section circular NK 577 07S1-0180Comet Helin-Alu (1991r) 07S1-0120
The following improved orbital elements, 06F1-001 by S. Nakano, 06F1-000 are from 73 observations 1991 June 13 to 1992 Nov. 28. Perturbations by all nine planets and five minor planets were taken into account. The mean residual is +/- 0.95 arc second. 06F1-001 Epoch = 06F1-000 1992 Feb. 28.0 06F1-001 TT 06F1-000 06F1-001 T = 06F1-000 1992 Feb. 19.93055 +/- 0.00903 06F1-001 (m.e.) TT 06F1-000 06F1-001 Peri. = 06F1-000 30.79128 +/- 0.00108 06F1-001 Node = 06F1-000 253.65346 +/- 0.00006 06F1-001 (2000.0) 06F1-000 06F1-001 Inc. = 06F1-000 49.29524 +/- 0.00008 06F1-001 q = 06F1-000 4.8499135 +/- 0.0000229 06F1-001 AU 06F1-000 06F1-001 e = 06F1-000 1.0000832 +/- 0.0000305 06F1-001 1/a = 06F1-000 -0.0000172 +/- 0.0000063 06F1-001 AUs1-1s0 06F1-000 The following residuals in seconds of arc are from the above orbital elements: 06F1-001Date/ UT R.A. (2000) Decl. *** O-C *** Code/Obs 06F1-000 06F1-001 h m s ¡ , " " " 06F1-000 1991 06 13.32257 16 38 54.26 -22 31 48.1 1.3- 1.3- 675/PL 1991 06 13.34722 16 38 53.41 -22 31 36.8 2.1- 1.0- 675/PL 1991 06 14.32899 16 38 23.06 -22 24 21.9 ( 3.3+ 2.1-) 675/PL 1991 06 14.35590 16 38 21.98 -22 24 10.5 ( 0.2+ 2.7-) 675/PL 1991 06 16.24878 16 37 23.67 -22 10 06.9 2.1+ 0.3+ 675/PL 1991 06 16.31753 16 37 21.50 -22 09 38.1 2.0+ 1.4- 675/PL 1991 06 16.34583 16 37 20.55 -22 09 23.6 1.1+ 0.5+ 675/PL 1991 06 16.36701 16 37 19.84 -22 09 12.3 0.4+ 2.4+ 675/PL 1991 06 17.60451 16 36 42.11 -22 00 07.4 1.5- 1.7- 894/ot 1991 06 17.61771 16 36 41.80 -21 59 59.5 0.1- 0.4+ 894/ot 1991 06 18.26736 16 36 22.42 -21 55 12.1 1.6+ 0.2- 675/PL 1991 06 18.29896 16 36 21.40 -21 54 59.1 0.9+ 1.2- 675/PL 1991 07 05.50707 16 28 52.49 -19 50 59.0 1.4- 0.4+ 474/JN 1991 07 05.52929 16 28 52.04 -19 50 50.1 0.9- 0.0 474/JN 1991 07 08.28368 16 27 55.62 -19 31 59.1 0.0 0.3+ 675/PL 1991 07 08.30816 16 27 55.05 -19 31 50.0 1.0- 0.6- 675/PL 1991 07 08.56424 16 27 50.16 -19 30 06.1 0.1+ 0.9- 372/sk 1991 07 08.57674 16 27 50.02 -19 29 58.7 1.6+ 1.4+ 372/sk 1991 07 08.57917 16 27 49.81 -19 29 57.4 0.5- 1.7+ 894/ot 1991 07 09.06775 16 27 40.52 -19 26 40.3 0.2+ 0.6+ 801/HO 1991 07 10.08134 16 27 21.52 -19 19 51.7 0.5+ 0.1- 801/HO 1991 07 10.10049 16 27 21.08 -19 19 43.5 0.5- 0.4+ 801/HO 1991 07 10.24201 16 27 18.47 -19 18 43.2 ( 0.5- 3.6+) 675/PL 1991 07 10.26701 16 27 17.97 -19 18 36.8 0.9- 0.0 675/PL 1991 07 11.07912 16 27 03.39 -19 13 11.7 0.9- 0.0 801/HO 1991 07 11.09525 16 27 03.15 -19 13 05.5 0.1- 0.2- 801/HO 1991 07 11.52016 16 26 55.59 -19 10 13.4 0.6- 0.2- 474/JN 1991 07 11.53926 16 26 55.22 -19 10 06.3 1.0- 0.7- 474/JN 1991 07 13.10329 16 26 29.01 -18 59 50.5 0.2+ 0.4- 801/HO 1991 07 13.12076 16 26 28.75 -18 59 43.1 0.8+ 0.1+ 801/HO 06F1-001 07S1-0120 - continued - 06F1-000 06F1-001 07S1-0180Comet Helin-Alu (1991r) NK 577 - 2 06F1-000 07S1-0120 ------------------------------------------------------------------------- 06F1-001Date/ UT R.A. (2000) Decl. *** O-C *** Code/Obs 06F1-000 06F1-001 h m s ¡ , " " " 06F1-000 1991 08 06.04181 16 23 35.41 -16 40 32.8 0.5+ 0.2- 801/HO 1991 08 06.06421 16 23 35.43 -16 40 25.7 0.3+ 0.1+ 801/HO 1991 08 11.06130 16 23 55.64 -16 16 01.8 0.4+ 0.1+ 801/HO 1991 08 13.19583 16 24 10.05 -16 06 11.7 ( 2.3- 5.9-) 675/PL 1991 08 14.17882 16 24 17.93 -16 01 38.9 ( 3.1- 1.7-) 675/PL 1991 08 14.19653 16 24 18.02 -16 01 32.9 ( 3.8- 0.5-) 675/PL 1991 09 07.04882 16 31 09.66 -14 29 47.2 0.5+ 0.3- 801/HO 1991 09 08.16389 16 31 38.52 -14 26 11.3 0.6- 0.6- 675/PL 1991 09 08.19948 16 31 39.52 -14 26 02.5 0.5+ 1.3+ 675/PL 1991 09 13.01166 16 33 53.78 -14 11 06.2 0.9+ 0.2- 801/HO 1991 09 13.02255 16 33 54.08 -14 11 03.4 0.6+ 0.7+ 801/HO 1992 04 02.77847 19 20 13.17 +04 35 37.7 1.9- 1.5- 372/sk 1992 04 29.33368 19 27 28.88 +09 40 17.6 0.1+ 0.1- 801/HO 1992 04 29.35093 19 27 28.95 +09 40 30.7 0.4- 1.0+ 801/HO 1992 05 03.74722 19 27 49.40 +10 31 37.5 0.8- 1.7+ 372/sk 1992 05 05.34481 19 27 53.21 +10 50 06.6 2.2+ 1.0+ 801/HO 1992 05 05.36023 19 27 53.13 +10 50 16.1 0.8+ 0.2- 801/HO 1992 06 23.68819 19 14 30.86 +18 59 45.6 0.6- 0.9+ 372/sk 1992 06 23.69792 19 14 30.66 +18 59 48.4 0.8+ 0.4- 372/sk 1992 07 04.07396 19 09 03.40 +20 05 12.4 ( 1.4+ 2.7+) 589/SK 1992 07 04.07938 19 09 03.19 +20 05 13.8 1.0+ 2.4+ 589/SK 1992 07 04.08717 19 09 02.94 +20 05 15.0 1.1+ 1.0+ 589/SK 1992 07 04.09494 19 09 02.73 +20 05 16.3 1.7+ 0.2- 589/SK 1992 07 26.12860 18 57 29.51 +21 24 35.0 0.0 0.2+ 801/HO 1992 07 26.15262 18 57 28.75 +21 24 37.8 0.7- 0.4+ 801/HO 1992 07 26.36420 18 57 22.59 +21 24 59.7 1.3- 0.0 658/DA 1992 07 26.36765 18 57 22.43 +21 24 59.4 2.2- 0.7- 658/DA 1992 07 26.37148 18 57 22.35 +21 24 59.6 1.7- 0.9- 658/DA 1992 07 27.34477 18 56 54.72 +21 26 38.3 0.9- 0.7- 658/DA 1992 07 27.34790 18 56 54.63 +21 26 38.7 0.9- 0.6- 658/DA 1992 07 28.18703 18 56 31.14 +21 27 57.5 0.1- 0.1+ 801/HO 1992 07 28.23058 18 56 29.87 +21 28 01.0 0.5- 0.2- 801/HO 1992 07 28.30417 18 56 27.88 +21 28 07.0 0.3- 0.6- 658/DA 1992 07 28.30698 18 56 27.78 +21 28 07.3 0.6- 0.5- 658/DA 1992 07 28.30973 18 56 27.72 +21 28 07.6 0.3- 0.5- 658/DA 1992 07 30.18103 18 55 36.40 +21 30 36.8 0.6- 0.0 801/HO 1992 07 30.20499 18 55 35.75 +21 30 38.2 0.5- 0.2- 801/HO 1992 08 24.09767 18 47 33.77 +21 20 38.2 1.5+ 0.2+ 801/HO 1992 08 24.13741 18 47 33.26 +21 20 33.7 0.6+ 0.2- 801/HO 1992 08 26.08228 18 47 14.20 +21 17 04.6 0.3+ 0.5- 801/HO 1992 08 26.18692 18 47 13.11 +21 16 52.5 0.9- 0.7- 801/HO 1992 09 24.99212 18 48 46.30 +20 00 34.6 1.3- 1.2+ 801/HO 1992 09 25.03855 18 48 47.01 +20 00 24.4 0.8- 1.0- 801/HO 1992 10 23.95220 19 01 02.66 +18 48 05.2 1.3+ 2.1- 801/HO 1992 10 23.97076 19 01 03.37 +18 48 05.9 2.3+ 0.7+ 801/HO 1992 10 27.94885 19 03 26.57 +18 40 56.4 1.0+ 0.8+ 801/HO 1992 10 27.96269 19 03 27.07 +18 40 54.8 0.9+ 0.6+ 801/HO 1992 11 27.93567 19 26 25.45 +18 22 01.2 0.8+ 0.4- 801/HO 1992 11 27.94914 19 26 26.11 +18 22 02.1 0.6+ 0.0 801/HO 1992 11 28.93692 19 27 16.34 +18 22 38.7 0.6+ 0.1- 801/HO ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 1993 Jan. 9 06F1