OAA computing section circular NK 468 Periodic Comet Russell 4 1984d

The following improved orbital elements, by S. Nakano, are from 39 observations 1984 Mar. 2 to 1984 May 7. Perturbations by all nine planets were taken into account. The mean residual is +/- 1.23 arc seconds: Epoch = 1984 Jan. 21.0 ET T = 1984 Jan. 5.96790 ET +/- 0.04457 (m.e.) ET Peri. = 91.25187 +/- 0.04952 Node = 71.88801 +/- 0.04691 1950.0 Inc. = 6.24759 +/- 0.01003 q = 2.1250093 +/- 0.0004271 AU e = 0.3832412 +/- 0.0000923 a = 3.4454464 +/- 0.0004623 AU nß = 0.15411177 +/- 0.00003102 P = 6.395 +/- 0.001287 years (+/- 0.47 day) The extension orbit is from the above orbital elements: T = 1984 Jan. 6.52562 ET Epoch = 1985 May 15.0 ET Peri. = 91.51089 e = 0.3833722 Node = 71.86828 1950.0 a = 3.4514136 AU Inc. = 6.24108 nß= 0.15371228 q = 2.1282377 AU P = 6.412 years m1 = 8.6 (k=15) The following residuals in seconds of arc are from the above orbital elements: Date/ UT R.A. (1950.0) Decl. *** O-C *** Code/Obs. h m s ¡ , " " " 1984 Mar. 2.73856 13 32 38.66 + 0 36 49.5 0.5- 1.7+ 413/SS 4 4.74591 13 32 26.14 + 0 40 59.9 2.4- 0.5- 413/SS 4 7.72909 13 31 54.33 + 0 47 56.2 0.6- 0.2+ 413/SS 10.42525 13 31 12.12 + 0 54 38.9 0.6+ 0.0 675/PL 11.28567 13 30 56.29 + 0 56 55.3 0.6+ 0.3- 675/PL 11.40094 13 30 53.81 + 0 57 14.3 0.8+ 0.1+ 675/PL 11.53428 13 30 50.88 + 0 57 35.6 0.9+ 0.0 675/PL 11.77951 13 30 46.14 + 0 58 14.4 1.8+ 0.8- 372/sk 12.24195 13 30 36.84 + 0 59 45.6 ( 1.9+ 16.1+) 801/HO 5 12.35962 13 30 34.05 + 0 59 52.1 ( 1.0+ 3.4+) 801/HO - continued - Periodic Comet Russell 4 NK 468-2 Date/ UT R.A. (1950.0) Decl. *** O-C *** Code/Obs. h m s ¡ , " " " 1984 Mar. 12.47222 13 30 31.59 + 1 00 09.0 0.1- 0.9+ 675/PL 12.47500 13 30 31.53 + 1 00 09.3 0.0 0.8+ 675/PL 21.29550 13 26 25.26 + 1 25 20.1 0.3+ 1.6- 675/PL 22.29723 13 25 50.59 + 1 28 14.4 0.2- 1.6- 675/PL 22.99437 13 25 25.61 + 1 30 14.9 0.6- 0.5- 046/KL 23.00577 13 25 25.17 + 1 30 19.3 0.7- 1.9+ 046/KL 26.54167 13 23 11.38 + 1 40 28.4 ( 5.7- 8.9+) 372/sk 26.68264 13 23 05.75 + 1 40 56.9 ( 3.6- 6.3+) 323/PR 26.90069 13 22 57.53 + 1 41 11.4 ( 1.4+ 6.4-) 552/SV 26.91944 13 22 56.83 + 1 41 18.9 2.6+ 2.0- 552/SV 27.28536 13 22 41.70 + 1 42 23.0 0.4- 1.7+ 801/HO 27.90069 13 22 17.00 + 1 43 59.6 2.3- 1.7- 552/SV 27.92292 13 22 15.93 + 1 44 00.4 ( 4.2- 4.5-) 552/SV 28.67792 13 21 45.05 + 1 46 08.6 0.3+ 1.6+ 381/ks 29.33090 13 21 17.63 + 1 47 50.5 ( 6.5- 1.6+) 657/VC 29.33090 13 21 17.63 + 1 47 50.5 ( 6.5- 1.6+) 657/VC 29.68750 13 21 03.22 + 1 48 53.9 1.7+ 0.2+ 323/PR 30.37190 13 20 34.37 + 1 50 27.3 ( 3.2+ 2.5-) 657/VC 31.35625 13 19 51.76 + 1 52 57.5 ( 5.5- 0.1-) 657/VC 31.35625 13 19 51.76 + 1 52 57.5 ( 5.5- 0.1-) 657/VC Apr. 2.33769 13 18 26.06 + 1 57 43.3 1.1+ 2.6+ 657/VC 2.33769 13 18 26.06 + 1 57 43.3 1.1+ 2.6+ 657/VC 3.69792 13 17 25.80 + 2 00 51.3 1.1- 0.3- 323/PR 4.15515 13 17 06.35 + 2 01 49.7 ( 9.9+ 8.2+) 801/HO A 4.30625 13 16 58.96 + 2 02 00.4 1.1+ 1.0- 688/LO 4.33125 13 16 57.62 + 2 02 02.8 1.4- 1.7- 688/LO 5.20694 13 16 18.91 + 2 03 51.2 0.6+ 0.3- 707/ev 5.64097 13 15 59.34 + 2 04 51.5 0.4- 0.3+ 323/PR 5.96096 13 15 44.89 + 2 05 15.5 ( 0.7- 3.6-) 046/KL 5.97520 13 15 44.16 + 2 05 18.9 1.6- 1.8- 046/KL 8.32849 13 13 58.71 + 2 09 30.9 0.9- 0.7- 675/PL 9.65972 13 12 59.23 + 2 11 40.5 0.6- 1.0- 323/PR 19.21209 13 06 11.47 + 2 18 29.7 ( 1.5+ 3.5-) 657/VC 19.87935 13 05 44.78 + 2 18 28.9 1.5- 1.3- 046/KL 19.89359 13 05 44.21 + 2 18 29.6 1.2- 0.5- 046/KL 21.33961 13 04 48.14 + 2 18 09.5 0.7- 0.0 675/PL 22.92865 13 03 48.97 + 2 17 17.5 1.0- 1.9- 046/KL A 24.89720 13 02 39.20 + 2 15 39.5 ( 0.4+ 3.3-) 046/KL 24.91144 13 02 38.76 + 2 15 43.3 1.6+ 1.3+ 046/KL 25.87459 13 02 06.09 + 2 14 40.4 0.8+ 0.6+ 046/KL 25.88872 13 02 05.56 + 2 14 40.4 0.3+ 1.6+ 046/KL 26.63889 13 01 40.80 + 2 13 52.2 0.6+ 0.0 323/PR 29.21436 13 00 21.07 + 2 09 51.0 2.3+ 1.8+ 801/HO May 7.21649 12 57 09.29 + 1 50 13.8 1.1- 0.0 801/HO ( ) -------- Rejected Obs.

Director, Computing Section Syuichi Nakano 1984 December 5

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