OAA computing section circular NK 555 Comet McNaught-Russell (1991g)
The following improved orbital elements, by S. Nakano, are from 35 observations 1991 Jan. 26 to May 16. Perturbations by all nine planets and five minor planets were taken into account. The mean residual is +/- 0.92 arc seconds. Epoch = 1990 Nov. 5.0 ET T = 1990 Oct. 18.26778 +/- 0.05737 (m.e.) ET Peri. = 320.89489 +/- 0.00755 Node = 161.01079 +/- 0.00149 (1950.0) Inc. = 113.43606 +/- 0.00350 q = 4.7772151 +/- 0.0002371 AU e = 1.0016354 +/- 0.0004307 1/a = -0.0003423 +/- 0.0000902 AU The following residuals are from the above orbital elements: Date/ UT R.A. (1950) Decl. *** O-C *** Code/Obs. h m s ¡ , " " " 1991 01 26.71715 11 23 43.87 -25 29 12.5 1.0- 0.6- 413/SS 1991 02 12.66106 11 09 35.31 -22 53 42.8 0.5+ 0.2+ 413/SS 1991 02 12.70273 11 09 33.08 -22 53 15.7 2.1+ 0.2- 413/SS 1991 02 13.59457 11 08 43.13 -22 43 19.9 1.0- 1.5+ 474/JN 1991 02 13.62034 11 08 41.87 -22 43 05.1 1.1+ 0.6- 413/SS 1991 02 13.66755 11 08 38.98 -22 42 31.7 1.2- 0.6+ 474/JN 1991 02 14.48740 11 07 53.12 -22 33 17.9 0.1- 0.9- 413/SS 1991 02 15.53275 11 06 54.00 -22 21 17.1 1.6+ 0.5- 413/SS 1991 02 19.66424 11 02 55.61 -21 31 37.5 1.4- 0.8+ 372/sk 1991 02 19.67535 11 02 55.12 -21 31 28.8 0.9+ 1.2+ 372/sk 1991 02 19.69758 11 02 53.80 -21 31 11.6 1.3+ 0.4- 413/SS 1991 02 20.40451 11 02 12.37 -21 22 23.4 1.0- 1.0- 675/PL 1991 02 20.42795 11 02 10.85 -21 22 05.2 ( 2.9- 0.6-) 675/PL 1991 02 20.67604 11 01 56.63 -21 18 56.1 0.7+ 0.8+ 372/sk 1991 02 23.74984 10 58 55.50 -20 39 08.6 0.3+ 0.3- 413/SS 1991 03 13.16270 10 41 52.45 -16 25 01.2 0.3- 0.5- 801/HO 1991 03 13.18434 10 41 51.19 -16 24 40.3 0.6- 0.0 801/HO 1991 03 13.65253 10 41 24.58 -16 17 16.3 1.0- 0.1+ 413/SS 1991 03 13.65940 10 41 24.21 -16 17 09.2 0.7- 0.7+ 413/SS 1991 03 14.56007 10 40 33.46 -16 03 01.6 2.4- 1.4- 372/sk 1991 03 20.52552 10 35 07.95 -14 27 31.1 1.1+ 0.6+ 413/SS 1991 03 21.12153 10 34 36.44 -14 17 56.3 0.2- 0.0 801/HO 1991 03 21.13618 10 34 35.64 -14 17 40.6 0.5- 1.5+ 801/HO 1991 04 05.48090 10 22 35.09 -10 09 43.8 ( 7.7- 13.4+) 413/SS 1991 04 09.19410 10 20 10.64 -09 11 34.7 0.1- 0.1+ 675/PL 1991 04 09.21962 10 20 09.80 -09 11 10.4 1.9+ 0.5+ 675/PL 1991 04 10.45704 10 19 24.14 -08 51 53.1 ( 0.5- 2.9+) 413/SS 1991 04 11.20200 10 18 57.42 -08 40 30.0 0.4- 1.8- 675/PL 1991 04 11.22986 10 18 56.50 -08 40 02.9 0.9+ 0.5- 675/PL 1991 04 12.10973 10 18 25.59 -08 26 33.1 0.4+ 1.1- 801/HO 1991 04 12.12563 10 18 25.04 -08 26 18.7 0.5+ 1.3- 801/HO 1991 04 13.09390 10 17 51.94 -08 11 30.1 0.6+ 0.6+ 801/HO 1991 04 13.11311 10 17 51.12 -08 11 12.6 1.7- 0.5+ 801/HO 1991 05 11.07103 10 08 14.15 -01 57 07.0 0.1+ 0.5+ 801/HO 1991 05 11.10421 10 08 13.87 -01 56 44.8 0.1+ 0.2+ 801/HO 1991 05 12.05363 10 08 06.68 -01 46 03.4 0.3+ 0.7+ 801/HO 1991 05 12.07087 10 08 06.51 -01 45 52.0 0.3- 0.6+ 801/HO 1991 05 16.42106 10 07 43.08 -00 58 41.8 0.3- 0.5- 413/SS ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 1991 September 4