OAA computing section circular NK 585 07S1-0180Periodic Comet Shoemaker-Holt 207S1-0120

The following improved orbital elements,06F1-001 by S. Nakano,06F1-000 are from 49 observations 1989 Mar. 4 to May 7. Perturbations by all nine planets and five minor planets were taken into account. The mean residual is +/- 1.12 arc seconds. 06F1-001 Epoch =06F1-000 1988 Aug. 27.006F1-001 TT06F1-000 06F1-001 T =06F1-000 1988 Aug. 7.23972 +/- 0.2097406F1-001 (m.e.) TT 06F1-000 06F1-001 Peri. =06F1-000 5.81203 +/- 0.10833 06F1-001 Node =06F1-000 99.78162 +/- 0.0934106F1-001 (2000.0) 06F1-000 06F1-001 Inc. =06F1-000 17.72713 +/- 0.03662 06F1-001 q =06F1-000 2.6441754 +/- 0.001415206F1-001 AU06F1-000 06F1-001 e =06F1-000 0.3398281 +/- 0.0003424 06F1-001 a =06F1-000 4.0052833 +/- 0.000528206F1-001 AU06F1-000 06F1-001 nß =06F1-000 0.12295727 +/- 0.00002432 06F1-001 P =06F1-000 8.016 +/- 0.001585706F1-001 years06F1-000 (+/- 0.5806F1-001 day06F1-000) The predicted orbit for the 1996 return is as follows: 06F1-001T =06F1-000 1996 Aug. 20.7035606F1-001 TT 06F1-00006F1-001 Epoch =06F1-000 1996 Aug. 25.006F1-001 TT06F1-000 06F1-001Peri. =06F1-000 5.90546 06F1-001 e =06F1-000 0.3376013 06F1-001Node =06F1-000 99.7424206F1-001 (2000.0) a =06F1-000 4.018063206F1-001 AU06F1-000 06F1-001Inc. =06F1-000 17.70045 06F1-001nß=06F1-000 0.12237112 06F1-001 q =06F1-000 2.661559806F1-001 AU P =06F1-000 8.05406F1-001 years06F1-000 The following residuals in seconds of arc are from the above orbital elements: 06F1-001Date/ UT R.A. (2000) Decl. *** O-C *** Code/Obs06F1-000 06F1-001 h m s ¡ , " " " 06F1-000 1989 03 04.88889 10 51 13.45 +31 19 16.6 1.3- 1.4- 026/BE 1989 03 09.33680 10 48 09.64 +31 39 06.5 0.6+ 2.2- 675/PL 1989 03 09.36892 10 48 08.31 +31 39 15.5 0.9+ 0.5- 675/PL 1989 03 10.13321 10 47 37.75 +31 42 09.3 0.3+ 0.9+ 801/HO 1989 03 90 12 07.27966 05 20 36.82 +37 55 41.7 2.8- 4.7+ 662/LI 1890 12 07.90288 05 20 03.01 +38 01 48.0 0.5+ 0.5- 546/OP 1890 12 08.24630 05 19 44.54 +38 05 12.8 2.4+ 0.5+ 662/LI 1890 12 08.85236 05 19 11.26 +38 10 59.0 2.4+ 2.6- 522/SR 1890 12 09.43668 05 18 37.75 +38 16 34.8 3.8- 1.3- 662/LI 1890 12 10.22598 05 17 55.16 +38 23 54.1 1.7- 0.3+ 662/LI 1890 12 11.94792 05 16 19.59 +38 39 07.3 3.2- 1.8+ 020/NI 1890 12 12.77024 05 15 34.98 +38 45 52.3 0.4- 4.3- 546/OP 1890 12 12.84804 05 15 30.80 +38 46 36.8 2.1+ 0.7+ 522/SR 1890 12 13.75466 05 14 41.01 +38 53 50.7 1.7- 3.0- 546/OP 1890 12 13.86825 05 14 34.87 +38 54 48.2 1.2+ 1.0- 522/SR 06F1-00107S1-0120 - continued -06F1-000 06F1-00107S1-0180Periodic Comet Spitaler NK 584 - 206F1-00007S1-0120 ------------------------------------------------------------------------- 06F1-001Date/ UT R.A. (2000) Decl. *** O-C *** Code/Obs06F1-000 06F1-001 h m s ¡ , " " " 06F1-000 1890 12 15.17434 05 13 24.41 +39 04 50.3 1.1+ 0.9+ 662/LI 1890 12 29.72834 05 02 39.74 +40 18 09.7 2.8- 2.6+ 546/OP 1890 12 30.77553 05 02 08.82 +40 20 55.2 3.4+ 1.7- 522/SR 1890 12 31.70514 05 01 43.01Date/ UT R.A. (2000) Decl. *** O-C *** Code/Obs06F1-000 06F1-001 h m s ¡ , " " " 06F1-000 1992 05 03.92431 14 00 02.51 +30 12 56.2 0.7+ 0.2+ 589/SK 1992 05 06.18443 13 58 57.78 +30 14 37.8 0.5+ 1.0+ 801/HO 1992 05 06.20084 13 58 57.32 +30 14 36.9 0.8+ 0.2- 801/HO 1992 05 10.74375 13 56 58.70 +30 12 23.3 1.2- 0.0 372/sk 1992 05 24.59792 13 53 01.27 +29 24 02.3 ( 3.1+ 2.7+) 372/sk 1992 05 25.56389 13 52 52.19 +29 18 29.1 ( 2.6- 2.6-) 372/sk 1992 05 26.58125 13 52 44.31 +29 12 29.3 1.0- 0.9- 372/sk 1992 06 01.52222 13 52 22.87 +28 32 09.9 1.5- 2.1- 372/sk 1992 06 03.09443 13 52 24.60 +28 20 11.0 0.3+ 1.7+ 801/HO 1992 06 03.11769 13 52 24.64 +28 19 59.7 0.7+ 1.4+ 801/HO 1992 06 03.50694 13 52 25.44 +28 16 55.2 1.1- 0.0 16.8 1.2+ 0.0 540/LZ 1992 03 01.06793 07 44 04.23 -01 10 20.6 ( 6.8- 6.5+) 801/HO 1992 03 01.08826 07 44 03.58 -01 10 25.6 ( 8.3- 7.4+) 801/HO 1992 03 04.80972 07 42 36.71 -01 27 51.8 0.7- 0.8+ 540/LZ 1992 03 04.85208 07 42 35.85 -01 28 04.5 0.4+ 0.4- 540/LZ 1992 03 05.06545 07 42 31.41 -01 29 01.3 0.2+ 0.2+ 801/HO 1992 03 05.10001 07 42 30.61 -01 29 10.7 0.5- 0.2+ 801/HO 1992 03 06.16285 07 42 09.70 -01 33 57.9 ( 3.2+ 3.1-) 675/PL 1992 03 06.19248 07 42 08.93 -01 34 04.4 0.8+ 1.7- 675/PL ( ) -------- Rejected Obs.

Director, Computing Section Syuichi Nakano 1993 Jan. 906F1

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