OAA computing section circular NK 584 07S1-0180Periodic Comet Spitaler07S1-0120

The following improved orbital elements,06F1-001 by S. Nakano,06F1-000 are from 23 observations 1890 Nov. 17 to 1891 Jan. 27. Perturbations by all nine planets and five minor planets were taken into account. The mean residual is +/- 2.56 arc seconds. 06F1-001 Epoch =06F1-000 1890 Nov. 9.006F1-001 TT06F1-000 06F1-001 T =06F1-000 1890 Oct. 27.51763 +/- 0.0928106F1-001 (m.e.) TT 06F1-000 06F1-001 Peri. =06F1-000 13.63748 +/- 0.08620 06F1-001 Node =06F1-000 46.52468 +/- 0.0817006F1-001 (2000.0) 06F1-000 06F1-001 Inc. =06F1-000 12.81560 +/- 0.02498 06F1-001 q =06F1-000 1.8163596 +/- 0.001279206F1-001 AU06F1-000 06F1-001 e =06F1-000 0.4696226 +/- 0.0002528 06F1-001 a =06F1-000 3.4246549 +/- 0.001775606F1-001 AU06F1-000 06F1-001 nß =06F1-000 0.15551735 +/- 0.00012095 06F1-001 P =06F1-000 6.338 +/- 0.004928706F1-001 years06F1-000 (+/- 1.8006F1-001 day06F1-000) The predicted orbit for the 1993 return is as follows: 06F1-001T =06F1-000 1993 Oct. 4.0456906F1-001 TT 06F1-00006F1-001 Epoch =06F1-000 1993 Oct. 20.006F1-001 TT06F1-000 06F1-001Peri. =06F1-000 48.41730 06F1-001 e =06F1-000 0.4374049 06F1-001Node =06F1-000 15.9523706F1-001 (2000.0) a =06F1-000 3.630299106F1-001 AU06F1-000 06F1-001Inc. =06F1-000 6.20346 06F1-001nß=06F1-000 0.14249199 06F1-001 q =06F1-000 2.042388606F1-001 AU P =06F1-000 6.91706F1-001 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 1890 11 17.15672 05 34 27.74 +33 41 59.2 5.0+ 3.9+ 546/OP 1890 12 04.72666 05 22 54.07 +37 28 42.3 2.7- 4.0- 546/OP 1890 12 04.77579 05 22 51.62 +37 29 17.5 0.7- 2.1- 546/OP 1890 12 07.01995 05 20 50.74 +37 52 59.1 0.5- 0.5+ 020/NI 1890 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 43.13 +40 23 15.4 3.4+ 3.5+ 546/OP 1891 01 06.74266 04 59 46.07 +40 32 46.6 ( 1.8- 5.7-) 546/OP 1891 01 11.31645 04 59 19.44 +40 35 12.4 4.0- 1.2+ 662/LI 1891 01 12.13265 04 59 21.95 +40 35 14.9 3.1+ 2.7+ 662/LI 1891 01 13.12670 04 59 25.49 +40 35 06.6 1.9- 1.3+ 662/LI 1891 01 27.73380 05 05 20.82 +40 19 37.1 2.1+ 3.9- 546/OP ( ) -------- Rejected Obs.

Director, Computing Section Syuichi Nakano 1992 Sept. 1006

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