OAA computing section circular NK 506 Periodic Comet Takamizawa 1984 VII

The following improved orbital elements, by S. Nakano, are from 105 observations 1984 July 6 to Nov. 25. Perturbations by all nine planets were taken into account. The mean residual is +/- 1.03 arc seconds. Epoch = 1984 May 20.0 ET T = 1984 May 24.95276 +/- 0.00199 (m.e.) ET Peri. = 147.53857 +/- 0.00363 Node = 124.22845 +/- 0.00323 (1950.0) Inc. = 9.46990 +/- 0.00071 q = 1.5945627 +/- 0.0000926 AU e = 0.5740064 +/- 0.0000176 a = 3.7431612 +/- 0.0001527 AU n_ = 0.13609629 +/- 0.00000833 P = 7.242 +/- 0.0004431 years (+/- 0.16 day) The predicted orbit for the 1991 return is as follows: T = 1991 Aug. 18.42665 ET Epoch = 1991 Aug. 12.0 ET Peri. = 147.64430 e = 0.5746638 Node = 124.25067 (1950.0) a = 3.7375279 AU Inc. = 9.48384 n_= 0.13640410 q = 1.5897058 AU P = 7.226 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 ! , " " " 1984 07 06.02760 21 13 12.88 -13 11 03.8 0.6+ 2.1+ 026/BE 1984 07 08.04375 21 13 48.64 -13 35 08.5 2.4+ 0.6- 026/BE 1984 07 26.68125 21 13 33.00 -17 47 56.0 ( 3.1- 4.4+) 372/sk 1984 07 26.70625 21 13 32.4 -17 48 16 ( 5.1- 5.4+) 372/sk Y 1984 07 31.67891 21 12 14.23 -18 57 28.7 1.1- 2.3- 387/tm 1984 08 01.43368 21 12 00.27 -19 07 38.7 ( 9.7- 1.8+) 675/PL 1984 08 01.69618 21 11 56.51 -19 11 12.8 0.8+ 0.9+ 381/ks 1984 08 02.02546 21 11 50.70 -19 15 38.9 0.8- 1.6+ 010/IC 1984 08 02.05486 21 11 50.00 -19 16 06.5 1.8- 2.4- 010/IC 1984 08 02.09653 21 11 49.47 -19 16 34.4 ( 3.3+ 2.9+) 010/IC 1984 08 02.29785 21 11 46.32 -19 19 20.0 1.5+ 0.1- 657/VC 1984 08 02.44803 21 11 43.84 -19 21 04.9 0.7- 0.1- 415/hr 1984 08 02.44957 21 11 43.83 -19 21 05.8 0.4- 0.3+ 415/hr 1984 08 02.58368 21 11 41.34 -19 22 54.3 0.1- 0.5+ 323/PR 1984 08 02.59462 21 11 41.08 -19 23 03.2 0.4- 0.5+ 323/PR 1984 08 02.69392 21 11 38.62 -19 24 31.6 ( 0.9- 4.2+) 372/sk 1984 08 02.74410 21 11 37.78 -19 25 03.6 0.0 0.2+ 323/PR 1984 08 02.74549 21 11 37.47 -19 25 11.2 ( 1.2- 5.3+) 372/sk 1984 08 02.89650 21 11 35.53 -19 27 19.2 0.2+ 0.3- 046/KL 1984 08 02.90108 21 11 35.41 -19 27 23.3 0.2- 0.7- 046/KL - continued - P/Takamizawa NK 506 - 2 Date/ UT R.A. (1950) Decl. *** O-C *** Code/Obs. h m s ! , " " " 1984 08 03.01560 21 11 32.99 -19 28 55.2 0.4+ 1.1- 046/KL 1984 08 03.01878 21 11 32.85 -19 28 57.4 0.7- 0.8- 046/KL 1984 08 03.29826 21 11 28.19 -19 32 38.1 1.2+ 0.8- 688/LO 1984 08 03.30625 21 11 28.00 -19 32 44.2 1.0+ 0.5- 688/LO 1984 08 03.35198 21 11 26.95 -19 33 21.7 1.2- 0.4- 657/VC 1984 08 03.50092 21 11 24.80 -19 35 04.0 1.1+ 0.3+ 415/hr 1984 08 03.67188 21 11 21.31 -19 37 21.0 0.1+ 0.3- 323/PR 1984 08 03.86204 21 11 18.10 -19 40 04.2 0.6+ 0.4- 056/SP 1984 08 03.92153 21 11 16.77 -19 40 50.5 0.2- 0.5+ 056/SP 1984 08 03.94865 21 11 16.25 -19 41 12.9 0.1- 0.6- 046/KL 1984 08 03.95027 21 11 16.24 -19 41 14.6 0.3+ 1.0- 046/KL 1984 08 04.02706 21 11 14.46 -19 42 14.8 1.3- 1.0- 046/KL 1984 08 04.02891 21 11 14.50 -19 42 15.8 0.2- 0.5- 046/KL 1984 08 04.62604 21 11 03.56 -19 50 02.4 ( 3.3- 1.3-) 387/tm 1984 08 04.65104 21 11 03.16 -19 50 21.0 1.0- 0.5- 387/tm 1984 08 04.92558 21 10 58.39 -19 53 54.5 0.3- 0.5+ 056/SP 1984 08 04.95902 21 10 57.65 -19 54 19.3 0.5- 1.6+ 056/SP 1984 08 05.98760 21 10 38.72 -20 07 32.1 ( 3.1- 0.8-) 993/WL 1984 08 06.07012 21 10 36.92 -20 08 37.1 ( 3.4- 3.0-) 985/85 1984 08 06.72240 21 10 25.08 -20 16 43.4 0.6+ 2.2+ 372/sk 1984 08 06.74253 21 10 24.73 -20 16 58.9 1.9+ 1.6+ 372/sk 1984 08 06.95422 21 10 21.12 -20 19 28.2 0.7- 0.2- 051/51 1984 08 06.95856 21 10 21.03 -20 19 31.5 0.6- 0.2- 051/51 1984 08 08.74965 21 09 48.22 -20 41 42.3 0.1+ 0.2+ 372/sk 1984 08 15.47037 21 07 58.37 -21 56 42.7 1.5- 0.4- 415/hr 1984 08 17.87230 21 07 25.91 -22 20 39.8 1.1+ 0.3- 046/KL 1984 08 17.87531 21 07 25.95 -22 20 42.8 2.3+ 1.5- 046/KL 1984 08 17.87986 21 07 25.82 -22 20 45.2 0.5+ 1.6- 026/BE 1984 08 19.90104 21 07 02.29 -22 39 20.5 0.8- 1.4- 026/BE 1984 08 19.90104 21 07 02.36 -22 39 16.3 0.1+ 2.8+ 026/BE 1984 08 20.93861 21 06 51.57 -22 48 22.3 2.5- 0.6- 046/KL 1984 08 20.94162 21 06 51.71 -22 48 24.3 0.0 1.0- 046/KL 1984 08 21.43995 21 06 46.64 -22 52 34.1 0.2- 0.3- 675/PL 1984 08 21.88716 21 06 43.34 -22 56 20.5 0.8- 0.9- 046/KL 1984 08 21.89023 21 06 43.41 -22 56 21.9 0.7+ 0.8- 046/KL 1984 08 22.19097 21 06 41.12 -22 58 46.5 0.7+ 1.1+ 688/LO 1984 08 22.24061 21 06 40.45 -22 59 15.2 ( 0.6- 3.0-) 688/LO 1984 08 22.87530 21 06 35.62 -23 04 19.7 0.2- 0.8- 046/KL 1984 08 22.87837 21 06 35.65 -23 04 20.9 0.7+ 0.5- 046/KL 1984 08 22.96944 21 06 34.88 -23 05 01.8 1.0+ 2.0+ 984/84 1984 08 23.60001 21 06 30.11 -23 09 44.4 0.6- 0.0 474/JN 1984 08 23.60823 21 06 30.02 -23 09 48.6 0.8- 0.5- 474/JN 1984 08 23.69653 21 06 29.70 -23 10 31.1 0.6+ 0.3+ 323/PR 1984 08 23.87663 21 06 28.91 -23 12 06.2 0.2+ 0.8- 046/KL 1984 08 23.88109 21 06 28.93 -23 12 08.1 1.1+ 0.7- 046/KL 1984 08 24.16919 21 06 26.87 -23 14 17.4 1.6- 0.2+ 801/HO 1984 08 24.57014 21 06 24.97 -23 17 15.1 1.3+ 0.8+ 372/sk 1984 08 24.62326 21 06 24.66 -23 17 29.3 1.0+ 0.0 323/PR 1984 08 25.56575 21 06 19.91 -23 24 14.5 0.6- 0.1- 474/JN 1984 08 25.57200 21 06 19.84 -23 24 16.6 0.9- 0.3+ 474/JN - continued - P/Takamizawa NK 506 - 3 Date/ UT R.A. (1950) Decl. *** O-C *** Code/Obs. h m s ! , " " " 1984 08 26.08379 21 06 18.46 -23 28 01.2 1.2- 2.6+ 811/MR 1984 08 26.10200 21 06 18.41 -23 28 12.3 0.4- 0.8- 801/HO 1984 08 27.12444 21 06 15.64 -23 35 02.9 0.8- 0.2+ 801/HO 1984 08 27.19931 21 06 15.58 -23 35 32.6 0.7- 0.4- 707/ev 1984 08 27.74375 21 06 14.28 -23 38 50.5 0.2- 0.6+ 323/PR 1984 08 28.11651 21 06 14.42 -23 41 23.2 1.2- 0.3- 801/HO 1984 08 28.68542 21 06 14.13 -23 44 40.9 0.3+ 0.5+ 323/PR 1984 08 28.93484 21 06 14.22 -23 46 11.9 1.1- 0.9- 051/51 1984 08 28.94664 21 06 14.24 -23 46 15.8 0.3- 0.7- 051/51 1984 08 29.60417 21 06 15.16 -23 50 04.2 1.3- 2.0+ 323/PR 1984 09 01.91667 21 06 28.56 -24 07 29.6 0.4+ 1.5+ 026/BE 1984 09 02.90671 21 06 35.39 -24 12 00.9 ( 3.8- 1.2-) 046/KL 1984 09 03.26667 21 06 38.00 -24 13 30.3 ( 8.2- 1.6+) 688/LO 1984 09 03.31111 21 06 38.86 -24 13 41.4 0.4+ 1.6+ 688/LO 1984 09 13.06215 21 09 15.48 -24 40 50.0 1.5+ 0.1+ 809/ES 1984 09 13.06424 21 09 15.57 -24 40 50.3 2.2+ 0.0 809/ES 1984 09 13.06632 21 09 15.64 -24 40 50.7 2.6+ 0.2- 809/ES 1984 09 18.03958 21 11 29.59 -24 44 40.4 1.6- 0.1- 809/ES 1984 09 18.04513 21 11 29.73 -24 44 40.7 1.7- 0.4- 809/ES 1984 09 18.05069 21 11 29.89 -24 44 41.0 1.6- 0.6- 809/ES 1984 09 19.83891 21 12 26.98 -24 44 38.0 2.7+ 1.9+ 071/SM 1984 09 19.87491 21 12 27.82 -24 44 36.9 0.9- 2.2+ 071/SM 1984 09 20.53242 21 12 49.80 -24 44 13.3 0.7- 0.8+ 474/JN 1984 09 20.99062 21 13 06.16 -24 44 02.4 0.1+ 0.1- 809/ES 1984 09 20.99548 21 13 06.31 -24 44 02.3 0.1+ 0.1- 809/ES 1984 09 21.00035 21 13 06.46 -24 44 02.3 0.0 0.2- 809/ES 1984 09 21.99444 21 13 41.71 -24 43 21.3 0.7+ 0.3+ 809/ES 1984 09 21.99861 21 13 41.85 -24 43 21.1 0.7+ 0.3+ 809/ES 1984 09 22.00278 21 13 41.99 -24 43 21.0 0.7+ 0.2+ 809/ES 1984 09 22.98958 21 14 18.30 -24 42 27.0 0.8+ 0.5+ 809/ES 1984 09 22.99375 21 14 18.46 -24 42 26.8 1.0+ 0.5+ 809/ES 1984 09 22.99791 21 14 18.62 -24 42 26.6 1.2+ 0.5+ 809/ES 1984 09 24.77083 21 15 26.81 -24 40 24.6 0.2- 1.0+ 095/CR 1984 09 24.79167 21 15 27.50 -24 40 22.7 1.4- 1.1+ 095/CR 1984 09 25.76389 21 16 07.31 -24 38 53.2 ( 3.8+ 2.0+) 095/CR 1984 09 25.78472 21 16 07.81 -24 38 54.8 0.4- 1.6- 095/CR 1984 09 26.77431 21 16 48.81 -24 37 09.8 ( 5.6- 0.6+) 095/CR 1984 09 26.78681 21 16 49.81 -24 37 04.4 ( 1.2+ 4.6+) 095/CR 1984 09 27.14236 21 17 04.74 -24 36 21.3 0.3+ 0.2+ 809/ES 1984 09 27.14792 21 17 04.96 -24 36 20.8 0.3+ 0.0 809/ES 1984 09 27.15347 21 17 05.16 -24 36 20.3 0.1- 0.2- 809/ES 1984 09 29.79687 21 19 03.19 -24 30 37.6 ( 0.4- 4.3+) 095/CR 1984 09 29.81458 21 19 03.94 -24 30 29.8 ( 0.8- 9.5+) 095/CR 1984 10 16.02992 21 33 55.42 -23 28 19.0 1.1- 0.7+ 801/HO 1984 10 18.08393 21 36 05.76 -23 17 36.3 0.6+ 0.2+ 801/HO 1984 10 22.26878 21 40 41.36 -22 54 07.4 0.7- 2.5- 568/MK 1984 10 22.27292 21 40 41.70 -22 54 05.8 0.3+ 2.3- 568/MK 1984 10 24.45185 21 43 10.03 -22 40 53.3 1.2- 0.4- 474/JN 1984 10 24.47726 21 43 11.85 -22 40 44.0 0.2+ 0.6- 474/JN 1984 10 25.45231 21 44 19.40 -22 34 42.0 0.2- 0.4- 474/JN 1984 10 25.47975 21 44 21.30 -22 34 30.8 0.1+ 0.4+ 474/JN 1984 11 25.46656 22 24 10.80 -18 38 29.9 2.6+ 1.3- 474/JN 1984 11 25.51691 22 24 14.34 -18 38 07.9 ( 5.9- 5.9-) 474/JN ( ) -------- Rejected Obs.

Director, Computing Section Syuichi Nakano 1987 August 20

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