OAA computing section circular NK 554 Comet Arai (1991b)

The following improved orbital elements, by S. Nakano, are from 71 observations 1990 Dec. 23 to 1991 Mar. 13. Perturbations by all nine planets and five minor planets were taken into account. The mean residual is +/- 1.09 arc seconds. Epoch = 1990 Dec. 15.0 ET T = 1990 Dec. 10.88922 +/- 0.00233 (m.e.) ET Peri. = 337.63370 +/- 0.00150 Node = 114.82622 +/- 0.00025 (1950.0) Inc. = 70.98394 +/- 0.00234 q = 1.4341810 +/- 0.0000259 AU e = 0.9906987 +/- 0.0001675 1/a = 0.0064855 +/- 0.0001168 AU 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 12 23.65113 09 15 09.42 -11 05 29.8 2.0- 0.5- 897/kj 1990 12 23.65453 09 15 09.53 -11 05 04.6 ( 2.8+ 8.0+) 897/kj 1991 01 06.61840 08 52 15.09 +14 17 17.2 2.4- 0.7+ 875/YO 1991 01 06.62708 08 52 13.84 +14 18 28.3 ( 2.0- 3.3+) 875/YO 1991 01 07.50659 08 50 07.38 +16 14 47.0 1.8+ 0.2+ 413/SS 1991 01 07.53333 08 50 02.8 +16 17 57 ( 6.9- 5.1-) 896/AV Y 1991 01 07.54809 08 50 01.0 +16 20 04 ( 0.6- 4.2+) 896/AV Y 1991 01 07.62049 08 49 49.88 +16 29 36.8 1.3- 0.3- 875/YO 1991 01 07.63194 08 49 48.36 +16 31 07.0 2.1+ 1.4- 875/YO 1991 01 07.66690 08 49 42.75 +16 36 04.5 1.3+ 0.1- 413/SS 1991 01 07.75989 08 49 28.51 +16 48 08.0 0.1+ 0.5- 372/sk 1991 01 08.50231 08 47 36.95 +18 27 16.6 0.6+ 0.0 413/SS 1991 01 08.51811 08 47 34.42 +18 29 05.2 0.5- 0.3- 897/kj 1991 01 08.52454 08 47 33.40 +18 29 58.0 0.6- 0.8+ 897/kj 1991 01 08.53692 08 47 31.42 +18 31 36.5 0.9- 0.1- 897/kj 1991 01 08.72049 08 47 01.76 +18 56 14.0 ( 3.5- 5.1+) 409/hi 1991 01 08.96597 08 46 24.08 +19 28 52.1 0.5+ 1.6- 540/LZ 1991 01 08.97743 08 46 22.18 +19 30 24.6 0.0 1.1- 540/LZ 1991 01 09.51667 08 44 56.60 +20 42 36.5 ( 0.3+ 4.0+) 399/ue 1991 01 09.60313 08 44 42.32 +20 54 09.5 0.2- 0.0 875/YO 1991 01 09.60660 08 44 41.63 +20 54 37.6 1.7- 0.1+ 409/hi 1991 01 09.61701 08 44 40.02 +20 56 02.1 0.2+ 1.0+ 875/YO 1991 01 09.79826 08 44 09.53 +21 20 15.4 0.1- 0.2- 372/sk 1991 01 10.73507 08 41 33.75 +23 25 23.8 1.5+ 1.6+ 391/ko 1991 01 10.74549 08 41 31.94 +23 26 47.0 1.7+ 1.6+ 391/ko 1991 01 10.81973 08 41 18.84 +23 36 38.9 0.0 0.8+ 409/hi 1991 01 10.82731 08 41 17.35 +23 37 41.1 ( 2.3- 2.6+) 409/hi 1991 01 10.85382 08 41 12.86 +23 41 13.6 ( 1.0- 4.7+) 391/ko 1991 01 11.95794 08 38 01.66 +26 07 35.4 2.3+ 1.2+ 503/CX 1991 01 12.57326 08 36 10.53 +27 28 27.5 ( 1.2- 3.9-) 871/k5 - continued - Comet Arai (1991b) NK 554 - 2 Date/ UT R.A. (1950) Decl. *** O-C *** Code/Obs. h m s ¡ , " " " 1991 01 12.58299 08 36 08.57 +27 29 42.4 ( 3.0- 5.6-) 871/k5 1991 01 13.49031 08 33 20.64 +29 27 43.4 0.3+ 1.0+ 372/sk 1991 01 13.49186 08 33 20.29 +29 27 54.9 0.4- 0.5+ 372/sk 1991 01 13.49340 08 33 19.94 +29 28 06.4 1.2- 0.0 372/sk 1991 01 14.23133 08 30 57.96 +31 02 39.8 0.6+ 0.3+ 801/HO 1991 01 14.26575 08 30 51.09 +31 07 02.5 0.7+ 0.6+ 801/HO 1991 01 14.87604 08 28 52.20 +32 24 00.4 1.5+ 0.8+ 540/LZ 1991 01 14.88785 08 28 49.65 +32 25 27.5 0.5- 1.2- 540/LZ 1991 01 14.89028 08 28 49.45 +32 25 44.8 1.5+ 0.4- 984/ri 1991 01 14.89907 08 28 47.33 +32 26 51.7 1.1- 1.5- 540/LZ 1991 01 15.54097 08 26 38.99 +33 46 42.1 0.7+ 1.1+ 875/YO 1991 01 15.55185 08 26 36.66 +33 48 01.0 0.2- 0.7- 875/YO 1991 01 16.84758 08 22 09.18 +36 24 36.1 ( 3.0+ 1.7-) 540/LZ 1991 01 16.85938 08 22 06.40 +36 26 01.7 0.0 0.4- 540/LZ 1991 01 16.87118 08 22 03.76 +36 27 27.2 1.3- 0.9+ 540/LZ 1991 01 18.18738 08 17 20.64 +39 00 01.5 0.3+ 1.0+ 801/HO 1991 01 18.76354 08 15 12.60 +40 04 28.4 0.2+ 1.9- 391/ko 1991 01 18.76910 08 15 11.55 +40 05 04.8 ( 2.6+ 2.3-) 391/ko 1991 01 18.77465 08 15 10.16 +40 05 43.2 1.1+ 0.5- 391/ko 1991 01 18.85382 08 14 54.07 +40 14 24.9 1.7+ 2.4- 540/LZ 1991 01 18.86840 08 14 50.54 +40 16 03.5 0.9- 0.7- 540/LZ 1991 01 18.88229 08 14 47.55 +40 17 35.8 1.0+ 0.6- 540/LZ 1991 01 19.59514 08 12 07.38 +41 35 04.8 ( 4.1+ 4.3-) 900/ir 1991 01 19.61563 08 12 02.46 +41 37 18.2 ( 2.6+ 2.7-) 900/ir 1991 01 19.82639 08 11 14.98 +41 59 46.6 ( 0.0 3.6+) 589/SK 1991 01 19.82986 08 11 14.07 +42 00 06.5 1.2- 1.3+ 589/SK 1991 01 19.84722 08 11 10.11 +42 01 56.2 0.4- 0.1- 589/SK 1991 01 19.84896 08 11 09.78 +42 02 06.0 0.4+ 1.4- 589/SK 1991 01 19.85069 08 11 09.39 +42 02 15.2 ( 0.5+ 3.2-) 589/SK 1991 01 19.86458 08 11 05.90 +42 03 51.8 ( 2.4- 4.7+) 589/SK 1991 01 19.86805 08 11 05.19 +42 04 12.2 ( 1.3- 2.9+) 589/SK 1991 01 19.87153 08 11 04.40 +42 04 32.3 1.0- 0.8+ 589/SK 1991 01 19.87500 08 11 03.79 +42 04 52.4 1.2+ 1.2- 589/SK 1991 01 20.30382 08 09 25.14 +42 49 51.1 1.2+ 0.3- 657/VC 1991 01 20.87014 08 07 13.85 +43 47 59.0 ( 2.6- 1.2+) 589/SK 1991 01 20.87361 08 07 13.09 +43 48 19.7 1.9- 0.7+ 589/SK 1991 01 20.87708 08 07 12.30 +43 48 40.4 1.5- 0.2+ 589/SK 1991 01 20.88055 08 07 11.47 +43 49 02.0 1.5- 0.7+ 589/SK 1991 01 20.88403 08 07 10.79 +43 49 22.7 0.1+ 0.1+ 589/SK 1991 01 20.88750 08 07 09.73 +43 49 44.0 2.4- 0.3+ 589/SK 1991 01 21.86111 08 03 20.44 +45 26 04.1 ( 3.1- 1.0+) 589/SK 1991 01 21.86458 08 03 19.77 +45 26 23.0 1.3- 0.3- 589/SK 1991 01 21.86805 08 03 18.85 +45 26 42.8 2.1- 0.7- 589/SK 1991 01 21.87153 08 03 18.20 +45 27 01.8 0.0 2.0- 589/SK 1991 01 21.87500 08 03 17.37 +45 27 21.2 ( 0.1+ 2.8-) 589/SK 1991 01 21.87847 08 03 16.54 +45 27 41.1 ( 0.3+ 3.1-) 589/SK 1991 01 21.88194 08 03 15.72 +45 28 01.4 ( 0.5+ 3.0-) 589/SK 1991 01 21.88542 08 03 14.90 +45 28 21.1 ( 0.8+ 3.5-) 589/SK 1991 01 22.64861 08 00 11.51 +46 40 47.8 1.3+ 0.7+ 372/sk 1991 01 25.73941 07 47 30.86 +51 05 45.5 0.2+ 1.5+ 046/KL - continued - Comet Arai (1991b) NK 554 - 3 Date/ UT R.A. (1950) Decl. *** O-C *** Code/Obs. h m s ¡ , " " " 1991 01 25.74184 07 47 30.13 +51 05 52.4 ( 0.9- 3.1-) 046/KL 1991 01 25.77234 07 47 20.87 +51 08 23.5 2.2+ 1.3+ 877/OK 1991 01 25.78264 07 47 18.21 +51 09 12.4 1.8+ 2.2+ 877/OK 1991 01 31.72743 07 22 09.81 +57 40 50.0 0.5- 1.9- 540/LZ 1991 01 31.74549 07 22 05.05 +57 41 50.2 1.6- 1.1- 540/LZ 1991 02 01.74063 07 17 53.99 +58 34 02.3 1.5- 0.8- 540/LZ 1991 02 01.75868 07 17 49.56 +58 34 59.1 0.2- 0.4+ 540/LZ 1991 02 01.77098 07 17 46.78 +58 35 38.7 ( 2.7+ 2.3+) 046/KL 1991 02 02.79512 07 13 30.71 +59 25 41.3 ( 2.8+ 2.7-) 046/KL 1991 02 02.80119 07 13 28.57 +59 26 06.0 ( 1.8- 4.6+) 046/KL 1991 02 05.52639 07 02 24.34 +61 23 34.1 0.7+ 0.6+ 875/YO 1991 02 05.53345 07 02 22.54 +61 23 49.1 0.2+ 1.0- 875/YO 1991 02 07.45972 06 54 53.86 +62 34 26.8 0.2- 0.3+ 372/sk 1991 02 09.82639 06 46 10.75 +63 49 02.8 ( 1.8- 2.6-) 540/LZ 1991 02 09.84479 06 46 06.50 +63 49 36.3 ( 3.2- 1.2-) 540/LZ 1991 02 10.53611 06 43 41.24 +64 09 12.6 0.7+ 0.7+ 875/YO 1991 02 13.51979 06 33 53.46 +65 23 25.7 0.4+ 0.7- 391/ko 1991 02 13.52743 06 33 51.98 +65 23 38.1 0.4+ 1.5+ 391/ko 1991 02 20.50347 06 15 45.64 +67 27 37.0 1.1+ 1.7+ 875/YO 1991 03 09.53194 06 00 07.24 +69 57 34.8 ( 2.8- 3.6+) 875/YO 1991 03 13.87778 06 01 47.23 +70 19 08.1 0.3- 0.8- 540/LZ 1991 03 13.92085 06 01 48.55 +70 19 18.7 1.1- 1.1- 540/LZ ( ) -------- Rejected Obs.

Director, Computing Section Syuichi Nakano 1991 September 4

Back to Nakano Note Page