OAA computing section circular NK 570 07S1-0180Periodic Comet Finlay07S1-0120

The following improved orbital elements,06F1-001 by S. Nakano,06F1-000 are from 18 observations 1967 - 1988, including full planetary and five minor planets perturbations and non-gravitational effect of style II. The mean residual is +/- 0.98 arc second. 06F1-001 Epoch =06F1-000 1988 June 8.006F1-001 TT06F1-000 06F1-001 T =06F1-000 1988 June 6.07486 +/- 0.0006306F1-001 (m.e.) TT 06F1-000 06F1-001 Peri. =06F1-000 322.27472 +/- 0.00161 06F1-001 Node =06F1-000 42.37012 +/- 0.0015606F1-001 (2000.0) 06F1-000 06F1-001 Inc. =06F1-000 3.65203 +/- 0.00008 06F1-001 q =06F1-000 1.0943827 +/- 0.000004906F1-001 AU06F1-000 06F1-001 e =06F1-000 0.6994711 +/- 0.0000021 06F1-001 a =06F1-000 3.6415227 +/- 0.000001506F1-001 AU06F1-000 06F1-001 nß =06F1-000 0.14183373 +/- 0.00000009 06F1-001 P =06F1-000 6.949 +/- 0.000004206F1-001 years06F1-000 06F1-001 A1 =06F1-000 +0.100 +/- 0.051 06F1-001 A2 =06F1-000 +0.01773 +/- 0.00016 06F1-001T =06F1-000 1967 July 28.2107406F1-001 TT 06F1-00006F1-001 Epoch =06F1-000 1967 July 9.006F1-001 TT06F1-000 06F1-001Peri. =06F1-000 321.75473 06F1-001 e =06F1-000 0.7019875 06F1-001Node =06F1-000 42.6258906F1-001 (2000.0) a =06F1-000 3.625226206F1-001 AU06F1-000 06F1-001Inc. =06F1-000 3.64627 06F1-001nß=06F1-000 0.14279119 06F1-001 q =06F1-000 1.080362906F1-001 AU P =06F1-000 6.90206F1-001 years06F1-000 06F1-001T =06F1-000 1974 July 3.9285606F1-001 TT 06F1-00006F1-001 Epoch =06F1-000 1974 July 12.006F1-001 TT06F1-000 06F1-001Peri. =06F1-000 322.19744 06F1-001 e =06F1-000 0.6991836 06F1-001Node =06F1-000 42.4099906F1-001 (2000.0) a =06F1-000 3.643005406F1-001 AU06F1-000 06F1-001Inc. =06F1-000 3.65002 06F1-001nß=06F1-000 0.14174716 06F1-001 q =06F1-000 1.095875806F1-001 AU P =06F1-000 6.95306F1-001 years06F1-000 06F1-001T =06F1-000 1981 June 19.9900006F1-001 TT 06F1-00006F1-001 Epoch =06F1-000 1981 June 5.006F1-001 TT06F1-000 06F1-001Peri. =06F1-000 322.19979 06F1-001 e =06F1-000 0.6984231 06F1-001Node =06F1-000 42.4312106F1-001 (2000.0) a =06F1-000 3.650560006F1-001 AU06F1-000 06F1-001Inc. =06F1-000 3.64714 06F1-001nß=06F1-000 0.14130738 06F1-001 q =06F1-000 1.100924606F1-001 AU P =06F1-000 6.97506F1-001 years06F1-000 The predicted orbit for the 1995 return is as follows: 06F1-001T =06F1-000 1995 May 5.0418006F1-001 TT 06F1-00006F1-001 Epoch =06F1-000 1995 May 3.006F1-001 TT06F1-000 06F1-001Peri. =06F1-000 323.54016 06F1-001 e =06F1-000 0.7103059 06F1-001Node =06F1-000 42.0480106F1-001 (2000.0) a =06F1-000 3.574679906F1-001 AU06F1-000 06F1-001Inc. =06F1-000 3.67392 06F1-001nß=06F1-000 0.14583049 06F1-001 q =06F1-000 1.035563606F1-001 AU P =06F1-000 6.75906F1-001 years06F1-000 The following residuals in seconds of arc are from the above orbital elements: 06F1-00107S1-0120 - continued -06F1-000 06F1-00107S1-0180Periodic Comet Finlay NK 570 - 206F1-00007S1-0120 ------------------------------------------------------------------------- 06F1-001Date/ UT R.A. (2000) Decl. *** O-C *** Code/Obs06F1-000 06F1-001 h m s ¡ , " " " 06F1-000 1967 07 17.74722 03 14 06.57 +14 53 24.4 0.1+ 1.1+ 387/TA 1967 07 17.75556 03 14 08.89 +14 53 32.7 1.6+ 1.4- 387/TA 1967 08 07.44032 04 42 41.97 +20 35 05.0 2.1- 0.2- 693/CT 1967 08 07.74448 04 43 55.46 +20 38 35.6 ( 5.8- 0.2-) 387/TA 1967 08 07.75903 04 43 59.08 +20 38 47.6 ( 4.2- 1.5+) 387/TA 1967 08 10.77292 04 56 02.42 +21 11 30.9 (10.0+ 8.4+) 387/TA 1967 08 11.08322 04 57 15.60 +21 14 32.2 ( 5.8+ 3.5+) 020/NI 1967 08 11.08946 04 57 17.05 +21 14 36.6 ( 5.5+ 4.0+) 020/NI 1967 08 15.11722 05 12 54.04 +21 51 28.3 ( 3.6- 0.6-) 020/NI 1967 10 07.80817 07 46 11.08 +23 16 43.1 0.0 1.7- 371/TA 1967 10 07.81234 07 46 11.52 +23 16 43.8 0.1- 0.8- 371/TA 1967 10 08.81025 07 47 59.94 +23 15 28.8 0.8+ 0.3- 371/TA 1974 07 18.76667 04 15 59.05 +20 14 35.1 ( 5.6- 9.4-) 372/sk 1974 07 18.78057 04 16 02.39 +20 14 50.6 ( 5.0- 4.8-) 372/sk 1974 07 19.76880 04 19 56.56 +20 27 27.5 ( 4.9- 0.0 ) 372/sk 1974 07 20.32512 04 22 08.17 +20 34 20.6 0.9- 1.3+ 801/HO 1974 09 12.48304 07 17 58.34 +23 44 34.8 1.0- 1.3+ 691/ST 1974 11 10.49068 08 47 01.71 +21 56 19.1 0.1+ 0.4+ 691/ST 1974 11 11.30249 08 47 24.95 +21 56 58.0 ( 2.8- 1.2+) 801/HO 1974 12 19.25712 08 36 11.84 +24 10 49.3 0.4- 0.1- 691/ST 1974 12 23.28356 08 31 50.65 +24 32 52.5 0.8- 0.8+ 801/HO 1975 01 07.29907 08 12 33.53 +25 50 22.2 1.1+ 0.3- 691/ST 1981 05 07.87951 23 58 33.27 -03 07 53.4 ( 8.4- 3.4+) 323/PR 1981 05 08.87986 00 02 23.84 -02 42 23.8 0.8+ 1.4- 323/PR 1981 08 10.48023 06 02 53.68 +24 03 28.3 1.2+ 1.7+ 675/PL 1981 08 11.48370 06 06 04.95 +24 05 25.1 0.1+ 0.7- 675/PL 1981 09 10.47747 07 28 40.46 +23 37 49.9 (13.9+ 1.1-) 675/PL 1988 04 21.72515 23 28 56.41 -06 04 59.4 0.8- 0.4- 474/JN 1988 04 21.74367 23 29 00.55 -06 04 30.9 1.1- 0.9+ 474/JN 1988 04 22.72156 23 32 40.94 -05 40 27.4 0.7+ 1.2+ 474/JN 1988 04 22.74066 23 32 45.45 -05 40 01.4 ( 3.8+ 1.0-) 474/JN ( ) -------- Rejected Obs.

Director, Computing Section Syuichi Nakano 1992 Apr. 2206F

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