OAA computing section circular NK 518 Periodic Comet Van Biesbroeck 1954 IV = 1966 III
= 1978 XXIV The following improved orbital elements, by S. Nakano, are from 145 observations 1954 to 1979. Perturbations by all nine planets were taken into account. The mean residual is +/- 1.02 arc seconds: Epoch = 1978 Nov. 28.0 ET T = 1978 Dec. 3.02153 +/- 0.00032 (m.e.) ET Peri. = 134.25265 +/- 0.00025 Node = 148.57778 +/- 0.00025 (1950.0) Inc. = 6.61860 +/- 0.00003 q = 2.3954543 +/- 0.0000013 AU e = 0.5525156 +/- 0.0000002 a = 5.3531566 +/- 0.0000001 AU n_ = 0.07957729 +/- 0.00000000 P = 12.386 +/- 0.0000005 years T = 1954 Feb. 20.76102 ET Epoch = 1954 Feb. 27.0 ET Peri. = 134.35138 e = 0.5501402 Node = 148.97518 (1950.0) a = 5.3671189 AU Inc. = 6.59013 n_= 0.07926697 q = 2.4144508 AU P = 12.434 years T = 1966 July 17.81686 ET Epoch = 1966 July 14.0 ET Peri. = 134.24713 e = 0.5504204 Node = 148.83108 (1950.0) a = 5.3598681 AU Inc. = 6.59767 n_= 0.07942787 q = 2.4096875 AU P = 12.409 years The predicted orbit for the 1991 return is as follows: T = 1991 Apr. 24.70070 ET Epoch = 1991 Apr. 14.0 ET Peri. = 134.14750 e = 0.5526613 Node = 148.43955 (1950.0) a = 5.3670876 AU Inc. = 6.61952 n_= 0.07926766 q = 2.4009062 AU P = 12.434 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 ! , " " " 1954 09 01.17646 22 47 57.61 -09 35 44.5 1.3+ 1.5- 754/YK 1954 09 01.18896 22 47 57.12 -09 35 49.7 0.8+ 2.1- 754/YK 1954 09 03.19933 22 46 47.14 -09 47 55.1 2.0+ 0.4- 754/YK 1954 09 03.20285 22 46 47.08 -09 47 54.2 1.1+ 1.3+ 662/LI 1954 09 03.21570 22 46 46.62 -09 47 59.4 1.1+ 0.7+ 662/LI 1954 09 04.36431 22 46 06.54 -09 54 51.1 1.4+ 0.8- 754/YK 1954 09 04.37837 22 46 05.89 -09 54 56.1 0.9- 0.8- 754/YK 1954 09 05.19591 22 45 38.12 -09 59 44.8 0.9+ 0.4- 754/YK 1954 09 06.16267 22 45 05.30 -10 05 20.9 ( 3.8+ 1.8+) 754/YK 1954 09 06.19601 22 45 03.88 -10 05 34.1 0.2+ 0.3+ 754/YK - continued - P/Van Biesbroeck NK 518 - 2 Date/ UT R.A. (1950) Decl. *** O-C *** Code/Obs. h m s ! , " " " 1954 09 07.20994 22 44 29.35 -10 11 24.7 1.9- 0.4+ 754/YK 1954 09 07.21898 22 44 29.31 -10 11 27.5 2.2+ 0.7+ 754/YK 1954 09 19.11276 22 38 23.43 -11 13 08.7 ( 2.4+ 5.1+) 754/YK 1954 09 19.12421 22 38 23.02 -11 13 12.3 ( 1.1+ 4.7+) 754/YK 1954 09 20.17979 22 37 55.05 -11 17 57.5 ( 2.8+ 4.7+) 754/YK 1954 09 20.18850 22 37 54.85 -11 18 04.1 1.5+ 0.1+ 662/LI 1954 09 20.20650 22 37 54.33 -11 18 09.2 1.1+ 0.2- 662/LI 1954 09 22.16342 22 37 04.72 -11 26 32.2 ( 0.1- 3.7+) 754/YK 1954 09 25.17072 22 35 55.54 -11 38 36.1 1.7+ 0.3+ 662/LI 1954 09 25.19565 22 35 54.90 -11 38 40.9 0.7+ 1.3+ 662/LI 1954 09 28.11066 22 34 55.73 -11 49 10.1 1.9- 0.7+ 754/YK 1954 09 28.11917 22 34 55.70 -11 49 11.4 0.2+ 1.2+ 754/YK 1954 09 30.23561 22 34 18.31 -11 56 02.9 0.5+ 1.0+ 662/LI 1954 09 30.25535 22 34 17.99 -11 56 06.0 1.0+ 1.5+ 662/LI 1954 10 03.14406 22 33 34.97 -12 04 21.8 ( 2.7+ 4.6+) 711/MC 1954 10 03.15135 22 33 34.88 -12 04 23.3 ( 3.0+ 4.2+) 711/MC 1954 10 04.22847 22 33 20.78 -12 07 13.3 0.2- 1.8+ 711/MC 1954 10 04.23611 22 33 20.68 -12 07 14.6 0.1- 1.7+ 711/MC 1954 10 05.25718 22 33 08.77 -12 09 44.6 0.7- 1.1+ 711/MC 1954 10 23.12922 22 32 55.45 -12 29 08.5 1.0+ 0.9+ 711/MC 1954 10 23.13790 22 32 55.50 -12 29 08.6 0.7+ 0.7+ 711/MC 1954 10 24.10698 22 33 05.22 -12 28 56.9 0.2- 1.0- 711/MC 1954 10 24.11462 22 33 05.33 -12 28 56.5 0.4+ 0.7- 711/MC 1954 10 26.13736 22 33 29.00 -12 28 04.7 0.3- 1.1- 711/MC 1954 10 26.14604 22 33 29.10 -12 28 04.8 0.3- 1.5- 711/MC 1954 10 27.13212 22 33 42.35 -12 27 28.3 0.5- 2.3- 711/MC 1954 10 27.16059 22 33 42.70 -12 27 26.8 0.7- 2.0- 711/MC 1954 11 12.99676 22 40 06.87 -11 58 19.3 1.1+ 1.3+ 754/YK 1954 11 13.01169 22 40 07.30 -11 58 16.9 0.8+ 1.3+ 754/YK 1954 11 15.00214 22 41 10.82 -11 52 45.8 1.6+ 0.3- 754/YK 1954 11 15.02089 22 41 11.50 -11 52 42.1 ( 2.8+ 0.2+) 754/YK 1954 11 16.00828 22 41 44.21 -11 49 47.3 1.6+ 0.8+ 754/YK 1954 11 16.99910 22 42 17.72 -11 46 45.9 1.9- 1.5+ 754/YK 1954 11 17.01322 22 42 18.35 -11 46 45.2 0.4+ 0.4- 754/YK 1954 11 17.11309 22 42 21.68 -11 46 25.3 1.3- 0.7+ 662/LI 1954 11 17.15535 22 42 23.16 -11 46 17.8 0.3- 0.4+ 662/LI 1954 11 28.02780 22 49 27.08 -11 06 56.6 1.6+ 0.3+ 754/YK 1954 11 28.04377 22 49 27.78 -11 06 51.8 1.9+ 1.2+ 754/YK 1955 01 15.14584 23 34 07.00 -06 35 11.8 ( 2.4+ 3.0+) 662/LI 1955 09 21.29108 02 52 09.94 +09 00 43.7 1.8- 0.7- 662/LI 1955 09 21.36518 02 52 08.60 +09 00 31.9 1.3- 0.1+ 662/LI 1955 09 27.42812 02 50 05.06 +08 42 29.8 0.2- 0.2- 662/LI 1955 09 27.49740 02 50 03.42 +08 42 17.1 0.5- 0.1- 662/LI 1955 10 11.30875 02 43 49.70 +07 57 14.1 0.0 0.6- 711/MC 1955 10 12.29973 02 43 18.82 +07 53 53.0 0.0 0.6- 711/MC 1955 10 12.31814 02 43 18.24 +07 53 49.8 0.2+ 0.1- 711/MC 1955 10 13.31153 02 42 46.73 +07 50 26.9 1.3- 1.1- 711/MC 1955 10 13.32136 02 42 46.54 +07 50 26.0 0.7+ 0.0 711/MC 1955 10 14.30079 02 42 15.14 +07 47 07.1 0.3+ 0.4+ 711/MC 1955 10 14.31248 02 42 14.72 +07 47 04.7 0.2- 0.4+ 711/MC - continued - P/Van Biesbroeck NK 518 - 3 Date/ UT R.A. (1950) Decl. *** O-C *** Code/Obs. h m s ! , " " " 1955 10 19.22249 02 39 32.16 +07 30 27.7 1.6+ 0.5+ 711/MC 1955 10 19.23545 02 39 31.55 +07 30 25.6 0.8- 1.0+ 711/MC 1955 10 20.28204 02 38 55.90 +07 26 56.7 ( 0.0 3.2+) 711/MC 1955 10 20.29488 02 38 55.48 +07 26 50.7 0.5+ 0.2- 711/MC 1955 10 21.24600 02 38 22.84 +07 23 39.9 0.2+ 0.2+ 711/MC 1955 10 21.26232 02 38 22.00 +07 23 35.0 ( 3.8- 1.5-) 711/MC 1955 10 24.33167 02 36 35.41 +07 13 25.5 1.9- 0.1- 662/LI 1955 10 24.40369 02 36 32.99 +07 13 11.5 0.5+ 0.1+ 662/LI 1955 11 07.20987 02 28 26.29 +06 30 51.1 1.9- 0.4- 662/LI 1955 11 07.29440 02 28 23.33 +06 30 37.6 1.5- 0.1+ 662/LI 1955 11 09.33321 02 27 13.09 +06 25 03.9 0.6- 0.3- 711/MC 1955 11 09.35197 02 27 12.38 +06 24 58.5 ( 1.4- 2.6-) 711/MC 1955 11 11.17620 02 26 10.63 +06 20 13.0 0.3- 1.3- 711/MC 1955 11 11.19495 02 26 09.94 +06 20 10.3 0.9- 1.1- 711/MC 1955 11 12.17083 02 25 37.22 +06 17 42.3 0.7- 0.4- 711/MC 1955 11 12.18403 02 25 36.78 +06 17 38.7 0.5- 2.0- 711/MC 1955 11 13.19549 02 25 02.99 +06 15 08.7 ( 2.9- 1.5-) 711/MC 1955 11 13.20764 02 25 02.63 +06 15 07.3 2.1- 1.1- 711/MC 1965 04 05.62083 12 00 44.37 +05 05 31.9 ( 3.5- 4.7+) 387/tm 1965 04 05.64444 12 00 44.08 +05 05 35.1 ( 4.6+ 1.7+) 387/tm 1965 05 01.18602 11 48 48.16 +06 29 18.0 1.4+ 1.1+ 689/FS 1965 05 01.26171 11 48 46.46 +06 29 28.1 1.2- 2.1+ 689/FS 1965 05 02.17696 11 48 29.35 +06 31 14.9 0.1- 1.1+ 689/FS 1965 05 02.24987 11 48 27.96 +06 31 23.5 0.2+ 1.3+ 689/FS 1965 05 22.19299 11 45 20.53 +06 46 49.8 0.2+ 0.8+ 689/FS 1965 05 23.19017 11 45 20.94 +06 46 25.6 0.6+ 0.7+ 689/FS 1966 05 13.36181 18 40 18.92 -14 10 33.7 ( 3.4+ 2.3-) 693/CT 1966 05 13.37361 18 40 19.02 -14 10 32.7 ( 2.2+ 2.7-) 693/CT 1966 05 24.35540 18 41 58.25 -13 53 14.4 0.4- 0.8- 693/CT 1966 05 24.36686 18 41 58.30 -13 53 13.3 0.5+ 0.5- 693/CT 1966 05 25.34549 18 41 58.57 -13 52 09.5 0.1- 0.8- 693/CT 1966 05 25.35104 18 41 58.55 -13 52 09.2 0.2- 0.8- 693/CT 1966 06 11.99306 18 38 26.86 -13 49 14.7 1.3- 0.9- 056/SP 1966 06 12.01215 18 38 26.42 -13 49 14.4 1.0- 0.2+ 056/SP 1966 06 12.34236 18 38 18.99 -13 49 31.7 2.1- 2.2- 693/CT 1966 06 12.34861 18 38 18.86 -13 49 31.7 1.7- 1.9- 693/CT 1966 06 12.95313 18 38 05.13 -13 50 03.6 0.4- 1.8- 056/SP 1966 06 12.99479 18 38 04.06 -13 50 04.0 0.8- 0.1+ 056/SP 1966 06 13.01563 18 38 03.40 -13 50 05.5 ( 2.9- 0.3-) 056/SP 1966 06 17.92882 18 35 58.88 -13 55 51.7 0.2- 0.2- 056/SP 1966 06 17.96007 18 35 57.96 -13 55 54.8 0.4- 0.5- 056/SP 1966 06 23.31250 18 33 22.96 -14 05 16.1 0.9- 1.7+ 693/CT 1966 06 23.32014 18 33 22.71 -14 05 16.8 0.9- 2.0+ 693/CT 1966 07 09.92813 18 24 51.04 -14 53 05.7 1.0- 0.1- 056/SP 1966 07 09.96979 18 24 49.86 -14 53 13.3 0.3+ 1.2+ 056/SP 1966 07 10.89757 18 24 23.69 -14 56 38.2 1.3+ 1.1- 056/SP 1966 07 10.93924 18 24 22.21 -14 56 47.4 2.1- 1.1- 056/SP 1966 07 11.75313 18 24 00.04 -14 59 41.4 0.2+ 1.5- 076/HB 1966 07 11.78229 18 23 59.14 -14 59 46.2 0.4- 0.4+ 076/HB 1966 07 11.96771 18 23 53.68 -15 00 36.9 0.7- 1.7- 056/SP - continued - P/Van Biesbroeck NK 518 - 4 Date/ UT R.A. (1950) Decl. *** O-C *** Code/Obs. h m s ! , " " " 1966 07 12.00833 18 23 52.50 -15 00 42.8 0.7- 1.4+ 056/SP 1966 07 12.89063 18 23 28.72 -15 04 04.5 1.5- 0.0 056/SP 1966 07 12.95972 18 23 26.90 -15 04 19.0 0.6+ 1.2+ 056/SP 1966 07 13.87326 18 23 02.86 -15 07 50.3 0.4- 0.7+ 056/SP 1966 07 13.91493 18 23 01.59 -15 08 00.7 2.0- 0.0 056/SP 1966 07 16.10990 18 22 06.68 -15 16 32.7 0.1+ 0.2+ 822/CO 1966 07 16.14750 18 22 05.66 -15 16 41.3 0.3- 0.6+ 822/CO 1966 07 16.98125 18 21 45.71 -15 20 11.6 0.9- 0.7- 056/SP 1966 07 16.99896 18 21 45.32 -15 20 15.2 0.2- 0.1- 056/SP 1966 07 17.89583 18 21 24.96 -15 23 54.8 0.2+ 0.4+ 056/SP 1966 07 17.93750 18 21 23.95 -15 24 05.6 0.1+ 0.2- 056/SP 1966 07 18.28924 18 21 16.08 -15 25 30.2 0.5- 1.1+ 693/CT 1966 07 18.29722 18 21 15.92 -15 25 33.3 0.0 0.0 693/CT 1966 07 20.83368 18 20 23.49 -15 36 06.0 0.0 0.4- 076/HB 1966 07 20.84896 18 20 23.12 -15 36 08.9 0.5- 0.6+ 076/HB 1966 07 20.96944 18 20 20.57 -15 36 38.2 0.0 1.7+ 076/HB 1966 08 08.88229 18 18 14.51 -17 01 31.4 0.2+ 1.4+ 056/SP 1966 08 08.90313 18 18 14.74 -17 01 41.3 ( 1.8+ 2.9-) 056/SP 1966 08 09.74202 18 18 21.48 -17 05 20.1 1.4+ 0.8+ 076/HB 1966 08 09.79722 18 18 21.68 -17 05 35.1 0.7- 0.9+ 076/HB 1966 08 17.77378 18 20 19.51 -17 41 09.6 0.5+ 0.0 076/HB 1966 08 17.82604 18 20 20.58 -17 41 22.1 1.6+ 1.1+ 076/HB 1966 08 19.82014 18 21 05.74 -17 49 59.9 0.3- 0.9+ 076/HB 1966 08 19.85625 18 21 06.50 -17 50 09.2 1.0- 0.8+ 076/HB 1966 09 17.17375 18 42 15.93 -19 30 24.2 0.6- 0.8- 693/CT 1966 10 16.16531 19 19 40.52 -20 07 18.3 2.2+ 1.0+ 693/CT 1977 12 17.40999 13 56 25.97 -07 15 50.8 1.5- 1.0+ 801/HO 1978 01 12.41986 14 23 33.50 -08 56 11.7 ( 4.5- 1.1+) 801/HO 1978 02 10.77569 14 48 09.54 -09 48 58.1 0.7- 0.1- 323/PR 1978 03 07.39529 15 00 15.64 -09 33 13.5 0.8+ 1.1- 801/HO 1978 03 10.83403 15 01 07.50 -09 26 25.4 ( 0.1+ 3.8-) 372/sk 1978 03 12.74792 15 01 30.8 -09 22 02 ( 2.6+ 2.3+) 372/sk Y 1978 04 07.68715 14 59 34.38 -07 54 01.1 1.5+ 1.1- 879/fr 1978 04 07.70104 14 59 33.94 -07 53 56.8 0.7- 0.4- 879/fr 1978 04 10.31730 14 58 38.74 -07 42 37.7 1.0+ 0.2+ 801/HO 1978 04 12.00320 14 57 59.32 -07 35 11.9 0.4+ 0.3+ 095/CR 1978 04 12.01309 14 57 59.03 -07 35 10.5 0.2- 0.9- 095/CR 1978 05 02.42778 14 46 59.75 -06 03 43.1 1.9+ 0.7+ 675/PL 1978 05 04.19392 14 45 52.49 -05 56 22.1 1.4+ 0.1+ 801/HO 1978 05 05.93938 14 44 45.30 -05 49 18.7 2.0+ 1.6- 095/CR 1978 05 05.94979 14 44 44.83 -05 49 16.1 1.2+ 1.5- 095/CR 1978 06 09.61354 14 26 42.63 -04 39 15.6 1.8+ 0.2+ 323/PR 1978 06 11.21699 14 26 18.16 -04 40 18.0 1.7- 0.6- 801/HO 1978 06 29.52604 14 25 42.98 -05 18 34.6 1.4+ 0.3+ 323/PR 1978 07 30.39862 14 41 43.93 -07 57 57.4 0.1+ 0.5- 474/JN 1978 07 30.41786 14 41 44.86 -07 58 05.2 0.3- 0.8- 474/JN 1978 08 05.38454 14 47 06.91 -08 38 24.2 0.9+ 0.8- 474/JN 1978 08 05.40682 14 47 08.20 -08 38 34.1 1.3+ 1.5- 474/JN 1978 08 08.47035 14 50 09.10 -09 00 03.5 0.2+ 0.2- 323/PR 1978 08 26.49583 15 11 09.07 -11 13 42.4 0.1+ 0.0 323/PR - continued - P/Van Biesbroeck NK 518 - 5 Date/ UT R.A. (1950) Decl. *** O-C *** Code/Obs. h m s ! , " " " 1979 06 26.28525 00 12 26.96 -00 28 52.4 ( 2.5+ 4.3+) 801/HO 1979 07 17.83750 00 24 30.93 -00 03 17.2 1.2+ 1.0+ 323/PR 1979 08 18.30072 00 25 50.51 -01 18 28.7 1.9+ 0.0 801/HO 1979 08 20.77917 00 25 07.12 -01 29 35.1 0.1- 0.0 210/AA 1979 08 20.80000 00 25 06.50 -01 29 41.8 ( 3.2- 0.9-) 210/AA 1979 09 16.24902 00 12 00.56 -03 53 14.9 1.5- 1.0+ 801/HO 1979 09 17.23294 00 11 24.29 -03 58 51.9 0.2- 0.8+ 801/HO 1979 09 17.25406 00 11 23.31 -03 58 56.7 ( 2.8- 3.2+) 801/HO 1979 09 18.24910 00 10 46.72 -04 04 37.6 ( 2.6+ 1.2+) 801/HO 1979 09 20.30081 00 09 29.86 -04 16 12.1 0.6- 0.8- 801/HO 1979 09 21.24622 00 08 54.51 -04 21 24.1 ( 0.9- 2.9+) 801/HO 1979 09 24.90289 00 06 38.04 -04 41 22.9 0.6+ 0.9- 095/CR ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 1987 August 20