OAA computing section circular NK 487 Periodic Comet Denning-Fujikawa 1978 XIX = 1978n
The following improved orbital elements, by S. Nakano, are from 17 observations 1978 Oct. 10 to Dec. 29: Perturbations by all nine planets were taken into account. The mean residual is +/- 1.53 arc seconds. Epoch = 1978 Oct. 19.0 ET T = 1978 Oct. 2.14156 +/- 0.00122 (m.e.) ET Peri. = 334.28084 +/- 0.00789 Node = 40.87043 +/- 0.00779 (1950.0) Inc. = 8.63932 +/- 0.00069 q = 0.7797073 +/- 0.0005461 AU e = 0.8199285 +/- 0.0000901 a = 4.3299866 +/- 0.0021217 AU nß = 0.10938915 +/- 0.00000140 P = 9.010 +/- 0.0066228 years (+/- 2.42 day) The predicted orbit for the 1987 return is as follows: T = 1987 Aug. 3.91353 ET Epoch = 1987 July 24.0 ET Peri. = 338.42855 e = 0.8215967 Node = 35.83181 (1950.0) a = 4.2791226 AU Inc. = 9.38982 nß= 0.11134532 q = 0.7634095 AU P = 8.852 years The following residuals in seconds of arc are from the above orbital elements: Date/ UT R.A. (1950) Decl. *** O-C *** Code/Obs. h m s ¡ , " " " 1978 10 10.50556 10 22 54.53 +06 04 40.1 0.7+ 1.9- 688/LO 1978 10 11.80729 10 20 41.00 +07 21 48.8 1.8- 2.8+ 372/sk 1978 10 11.81667 10 20 40.20 +07 22 20.8 0.1- 2.6+ 372/sk 1978 10 11.82571 10 20 39.5 +07 22 55 ( 3.9+ 6.2+) 885/ur 1978 10 11.85729 10 20 37.38 +07 24 59.2 (14.0+ 6.8-) 323/PR 1978 10 12.13507 10 20 10.17 +07 40 06.6 0.7- 0.9+ 063/TU 1978 10 12.86111 10 19 08.24 +08 20 20.6 1.3- 1.6- 323/PR 1978 10 13.50000 10 18 18.27 +08 53 19.4 0.9+ 2.1- 688/LO 1978 10 13.86042 10 17 51.16 +09 11 52.9 (12.7- 16.3-) 323/PR 1978 10 14.13335 10 17 33.20 +09 25 16.1 ( 4.1+ 2.7+) 020/NI 1978 10 14.19014 10 17 29.04 +09 28 00.3 2.1+ 2.3- 020/NI 1978 10 16.83576 10 15 04.24 +11 28 28.4 ( 3.7- 4.5-) 372/sk 1978 10 28.39100 10 13 35.02 +17 24 18.5 0.9+ 0.6+ 801/HO 1978 10 29.76806 10 13 58.26 +17 54 28.5 0.9+ 2.9+ 372/sk 1978 10 29.78993 10 13 58.42 +17 54 52.4 1.4- 1.6- 372/sk 1978 10 31.80799 10 14 37.6 +18 36 05 ( 2.2- 4.7+) 372/sk 1978 11 01.40891 10 14 50.17 +18 47 35.3 0.1- 1.2- 801/HO 1978 11 02.37655 10 15 11.29 +19 05 50.6 0.3- 1.6+ 801/HO 1978 11 02.80069 10 15 20.56 +19 13 38.2 ( 3.6- 1.0-) 372/sk 1978 11 03.40416 10 15 34.09 +19 24 33.2 0.2+ 1.3+ 801/HO - continued - NK 487 - 2 Date/ UT R.A. (1950) Decl. *** O-C *** Code/Obs. h m s ¡ , " " " 1978 11 04.40569 10 15 56.74 +19 42 12.1 0.5+ 0.5+ 801/HO 1978 11 08.78368 10 17 32.59 +20 54 25.8 (16.6- 18.4+) 372/sk 1978 11 09.79965 10 17 54 +21 09.9 ( 6.4- 2.3+) 372/sk Y 1978 11 26.38321 10 19 13.84 +25 10 38.6 1.1+ 2.9- 801/HO 1978 12 03.42561 10 15 57.15 +26 56 39.1 1.6- 1.3- 801/HO 1978 12 29.39014 09 37 55.53 +33 36 31.9 0.1- 1.6+ 801/HO ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 1985 December 22