OAA computing section circular NK 529 Periodic Comet Tsuchinshan 2
The following improved orbital elements, by S. Nakano, are from 39 observations 1965 to 1985, including full planetary perturbations and non-gravitational effect of style II. The mean residual is +/- 1.10 arc seconds. Epoch = 1985 Aug. 3.0 ET T = 1985 July 21.18515 +/- 0.00560 (m.e.) ET Peri. = 203.15973 +/- 0.00224 Node = 287.60564 +/- 0.00043 (1950.0) Inc. = 6.70299 +/- 0.00006 q = 1.7941301 +/- 0.0000040 AU e = 0.5023994 +/- 0.0000024 a = 3.6055628 +/- 0.0000020 AU nß = 0.14396088 +/- 0.00000012 P = 6.846 +/- 0.0000057 years A1 = -0.856 +/- 0.304 A2 = -0.00380 +/- 0.00068 T = 1965 Feb. 9.28743 ET Epoch = 1965 Feb. 9.0 ET Peri. = 203.00557 e = 0.5065334 Node = 287.71503 (1950.0) a = 3.5848086 AU Inc. = 6.73452 nß= 0.14521287 q = 1.7689835 AU P = 6.787 years T = 1971 Nov. 29.92075 ET Epoch = 1971 Nov. 25.0 ET Peri. = 203.16495 e = 0.5055368 Node = 287.63205 (1950.0) a = 3.5898895 AU Inc. = 6.72580 nß= 0.14490470 q = 1.7750683 AU P = 6.802 years T = 1978 Sept.20.99681 ET Epoch = 1978 Sept. 9.0 ET Peri. = 203.18319 e = 0.5041529 Node = 287.63912 (1950.0) a = 3.5990409 AU Inc. = 6.71490 nß= 0.14435237 q = 1.7845740 AU P = 6.828 years The predicted orbit for the 1992 return is as follows: T = 1992 May 20.09355 ET Epoch = 1992 May 18.0 ET Peri. = 203.16068 e = 0.5044087 Node = 287.59374 (1950.0) a = 3.5960219 AU Inc. = 6.71506 nß= 0.14453419 q = 1.7821573 AU P = 6.819 years The following residuals in seconds of arc are from the above orbital elements: - continued - P/Tsuchinshan 2 NK 529 - 2 Date/ UT R.A. (1950) Decl. *** O-C *** Code/Obs. h m s ¡ , " " " 1965 01 11.83958 08 15 23.14 +17 34 25.0 1.3- 0.5+ 330/TS 1965 01 13.84722 08 14 13.93 +17 21 27.9 0.9+ 0.2+ 330/TS 1965 01 14.90208 08 13 36.02 +17 14 41.9 0.2- 0.1+ 330/TS 1965 01 26.63194 08 06 13.37 +16 02 31.9 1.5- 1.2- 330/TS 1965 02 02.60972 08 02 15.14 +15 22 45.9 1.8- 0.2- 330/TS 1965 02 11.80556 07 58 40.64 +14 34 27.8 1.2- 0.1- 330/TS 1965 02 23.48264 07 58 07.35 +13 39 31.6 0.1- 0.6- 330/TS 1965 03 04.55139 08 01 07.32 +13 00 27.6 0.1- 0.1- 330/TS 1965 03 09.62604 08 04 07.27 +12 39 06.3 ( 5.1+ 3.4-) 324/PK 1965 03 10.27284 08 04 33.71 +12 36 28.1 0.3+ 0.3+ 689/FS 1965 03 10.31242 08 04 35.21 +12 36 17.8 0.7- 0.2+ 689/FS 1965 03 27.53402 08 21 14.72 +11 21 12.0 ( 6.6- 1.7-) 330/TS 1965 04 01.17698 08 27 05.35 +10 59 08.3 2.1+ 0.6+ 689/FS 1965 04 01.18601 08 27 06.02 +10 59 05.5 1.8+ 0.5+ 689/FS 1965 04 19.19057 08 53 38.12 +09 20 48.5 1.9+ 0.4+ 689/FS 1965 04 19.21557 08 53 40.51 +09 20 39.0 2.3+ 0.1+ 689/FS 1965 04 24.58750 09 02 29.33 +08 46 54.6 ( 5.6+ 1.4+) 324/PK 1965 05 31.18853 10 07 50.88 +04 01 35.5 1.0+ 0.7+ 689/FS 1965 05 31.23020 10 07 55.52 +04 01 12.9 1.8+ 0.6+ 689/FS 1971 09 19.48194 08 15 36.93 +20 57 38.8 1.5+ 1.2- 693/CT 1971 09 22.45700 08 23 04.22 +20 25 56.2 0.2- 0.5+ 691/ST 1971 09 22.48875 08 23 09.02 +20 25 35.3 0.6+ 0.2+ 691/ST 1971 10 15.48250 09 19 10.97 +15 36 12.0 2.4+ 0.6+ 691/ST 1971 10 15.50501 09 19 14.13 +15 35 52.9 2.3+ 0.4+ 691/ST 1971 11 22.50972 10 42 36.46 +05 37 34.7 0.0 0.1+ 693/CT 1971 11 22.53056 10 42 38.94 +05 37 14.0 0.3+ 0.3+ 693/CT 1971 12 16.42569 11 26 13.75 -00 59 29.4 0.0 0.3+ 693/CT 1971 12 16.45000 11 26 16.11 -00 59 53.5 0.3+ 0.2- 693/CT 1971 12 28.81458 11 44 56.3 -04 14 16 2.4- 1.7+ 370/sk Y 1972 01 13.79514 12 03 53.22 -08 01 42.8 ( 6.2- 3.1+) 370/sk 1972 01 13.81042 12 03 54.35 -08 01 53.7 ( 2.1- 4.3+) 370/sk 1972 01 15.77639 12 05 45.5 -08 27 25 ( 3.5- 1.7+) 380/kj Y 1972 01 15.81424 12 05 47.7 -08 27 51 ( 0.3- 4.8+) 380/kj Y 1972 01 17.87014 12 07 35.9 -08 53 48 ( 5.7- 3.6+) 370/sk Y 1972 01 22.34376 12 11 05.61 -09 47 32.2 2.0- 0.1- 806/CH 1972 01 22.84306 12 11 26.0 -09 53 22 ( 8.1- 4.2+) 370/sk Y 1972 01 26.26048 12 13 37.03 -10 31 27.5 ( 4.7- 0.8+) 806/CH 1972 03 10.28414 12 06 57.84 -14 10 29.7 0.4- 1.5- 691/ST 1972 03 10.30949 12 06 56.69 -14 10 27.5 0.1- 1.6- 691/ST 1972 04 09.14038 11 46 58.33 -12 00 20.1 1.1- 2.1+ 805/EL 1972 04 17.30249 11 44 16.10 -11 15 49.8 1.1+ 1.2- 691/ST 1972 04 17.32633 11 44 15.75 -11 15 42.3 1.4+ 1.3- 691/ST 1972 04 19.15720 11 43 54.31 -11 06 09.8 1.0- 0.8+ 805/EL 1972 05 18.17853 11 50 08.73 -09 35 44.8 0.5+ 0.8- 691/ST 1978 10 29.81875 11 25 50.5 -00 03 02 ( 9.3- 3.4-) 372/sk Y 1978 10 29.83333 11 25 52.5 -00 03 12 ( 8.3- 1.5+) 372/sk Y 1978 12 01.43016 12 34 13.01 -08 55 33.7 2.7- 1.0+ 801/HO 1985 04 10.16944 04 03 38.74 +22 54 37.2 0.8- 0.1- 675/PL 1985 04 10.17333 04 03 39.36 +22 54 38.4 0.5+ 0.2+ 675/PL 1985 05 08.16431 05 11 47.26 +24 00 36.6 0.1+ 0.6- 675/PL 1985 05 08.16806 05 11 47.92 +24 00 36.9 1.2+ 0.4- 675/PL ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 1988 November 3