OAA computing section circular NK 495 Periodic Comet Machholz (1986e)
The following improved orbital elements, by S. Nakano, are from 62 observations 1986 May 13 to Sept. 5. Perturbations by all nine planets were taken into account. The mean residual is +/- 0.96 arc second: Epoch = 1986 May 10.0 ET T = 1986 Apr. 23.51681 +/- 0.00016 (m.e.) ET Peri. = 14.52720 +/- 0.00101 Node = 93.80492 +/- 0.00158 (1950.0) Inc. = 59.99242 +/- 0.00170 q = 0.1267743 +/- 0.0000192 AU e = 0.9580175 +/- 0.0000043 a = 3.0196926 +/- 0.0003360 AU n_ = 0.18782784 +/- 0.00003135 P = 5.247 +/- 0.0008759 years (+/- 0.32 day) The predicted orbit for the 1991 return is as follows: T = 1991 July 22.36993 ET Epoch = 1991 July 3.0 ET Peri. = 14.52989 e = 0.9583744 Node = 93.82183 (1950.0) a = 3.0161180 AU Inc. = 60.15024 n_= 0.18816185 q = 0.1255476 AU P = 5.238 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 ! , " " " 1986 05 13.43889 00 34 05.29 +39 12 12.7 0.4+ 0.6+ 688/LO 1986 05 13.45486 00 33 58.40 +39 12 48.3 1.5- 0.0 688/LO 1986 05 13.72101 00 32 06.39 +39 22 35.4 ( 6.6+ 0.7+) 392/JS 1986 05 13.74022 00 31 57.87 +39 23 18.1 ( 2.5+ 0.2+) 392/JS 1986 05 14.74931 00 24 40.02 +40 00 08.3 0.7+ 1.1+ 372/sk 1986 05 14.77622 00 24 28.21 +40 01 08.6 2.0+ 1.7+ 372/sk 1986 05 15.32639 00 20 21.12 +40 20 49.9 ( 2.7- 1.7-) 801/HO 1986 05 15.42819 00 19 35.24 +40 24 28.3 ( 2.8+ 1.0+) 657/VC 1986 05 15.46493 00 19 18.33 +40 25 49.7 0.7+ 2.2+ 657/VC 1986 05 16.42889 00 11 49.43 +40 59 49.2 1.0+ 0.7- 657/VC 1986 05 16.43681 00 11 45.52 +41 00 12.8 ( 3.0- 2.4+) 688/LO 1986 05 16.44722 00 11 39.92 +41 00 36.6 (10.2- 3.8+) 688/LO 1986 05 17.43958 00 03 37.13 +41 34 49.3 ( 2.9- 0.6-) 688/LO 1986 05 17.45434 00 03 29.92 +41 35 20.0 0.9- 0.8- 688/LO 1986 05 17.71771 00 01 17.86 +41 44 19.2 ( 1.8+ 4.6+) 392/JS 1986 05 17.72431 00 01 14.09 +41 44 26.0 ( 3.0- 2.4-) 392/JS 1986 05 17.76493 00 00 53.75 +41 45 54.0 2.0- 0.5+ 372/sk 1986 05 17.76910 00 00 52.00 +41 46 00.3 2.1+ 1.9- 372/sk 1986 05 17.77222 00 00 50.48 +41 46 09.1 ( 2.9+ 0.4+) 372/sk 1986 05 18.08194 23 58 12.17 +41 56 28.2 2.0+ 1.2- 026/BE - continued - P/Machholz NK 495 - 2 Date/ UT R.A. (1950) Decl. *** O-C *** Code/Obs. h m s ! , " " " 1986 05 18.42569 23 55 13.48 +42 07 57.3 ( 4.8- 1.4-) 688/LO 1986 05 18.45139 23 54 59.92 +42 08 49.6 ( 5.5- 1.5-) 688/LO 1986 05 19.44028 23 46 10.01 +42 40 55.5 ( 4.8+ 1.6-) 688/LO 1986 05 26.36111 22 29 47.88 +45 24 45.5 ( 0.2- 13.9-) 657/VC 1986 05 26.76007 22 24 32.66 +45 29 21.4 ( 0.1+ 3.7+) 372/sk 1986 05 26.76424 22 24 29.71 +45 29 27.7 ( 4.3+ 7.4+) 372/sk 1986 05 29.73021 21 42 43.62 +45 30 06.2 ( 5.5- 0.4-) 372/sk 1986 05 29.73472 21 42 40.09 +45 29 59.7 ( 0.1- 4.4-) 372/sk 1986 05 29.75347 21 42 23.28 +45 29 54.1 0.3- 0.3+ 372/sk 1986 05 30.42090 21 32 25.59 +45 21 24.3 1.4- 1.5+ 657/VC 1986 05 31.66458 21 13 29.71 +44 56 11.7 1.1- 0.7+ 372/sk 1986 05 31.77292 21 11 48.67 +44 53 26.2 2.0- 1.0- 372/sk 1986 06 02.40840 20 46 28.06 +43 58 19.4 1.7- 0.4+ 657/VC 1986 06 03.27555 20 33 01.06 +43 19 29.1 1.4- 0.9- 801/HO 1986 06 03.97361 20 22 15.68 +42 43 11.9 ( 7.5- 5.2-) 552/SV 1986 06 03.99306 20 21 57.89 +42 42 12.9 ( 5.1- 1.0-) 552/SV 1986 06 04.30915 20 17 07.92 +42 24 29.3 ( 2.6+ 1.9+) 801/HO 1986 06 05.21174 20 03 30.23 +41 28 47.8 1.3+ 0.1+ 801/HO 1986 06 05.32081 20 01 52.51 +41 21 40.5 0.4- 0.0 691/ST 1986 06 05.32897 20 01 45.31 +41 21 07.7 1.4+ 0.8- 691/ST 1986 06 05.33672 20 01 38.11 +41 20 38.1 0.9- 0.1+ 691/ST 1986 06 05.33896 20 01 36.22 +41 20 28.0 0.6+ 1.2- 691/ST 1986 06 06.32986 19 47 02.41 +40 10 47.5 0.2- 0.6- 707/ev 1986 06 06.39182 19 46 08.44 +40 06 15.5 1.0+ 0.4- 691/ST 1986 06 06.39396 19 46 06.60 +40 06 07.1 1.4+ 0.7+ 691/ST 1986 06 07.32708 19 32 52.47 +38 53 26.5 0.1- 0.6- 707/ev 1986 06 07.77813 19 26 37.21 +38 16 19.0 ( 8.3- 2.4-) 372/sk 1986 06 09.25651 19 07 07.43 +36 06 34.7 0.0 0.2+ 801/HO 1986 06 09.59601 19 02 50.37 +35 35 19.0 ( 7.5- 1.9+) 399/ue 1986 06 10.27270 18 54 32.29 +34 31 38.8 0.7- 0.7- 801/HO 1986 06 11.01938 18 45 44.97 +33 19 41.4 1.6+ 0.1+ 046/KL 1986 06 11.02563 18 45 40.49 +33 19 04.6 0.1+ 0.2- 046/KL 1986 06 11.36841 18 41 46.26 +32 45 39.7 1.1+ 1.1- 691/ST 1986 06 11.38149 18 41 37.27 +32 44 24.1 0.8+ 0.4+ 691/ST 1986 06 11.39014 18 41 31.86 +32 43 37.1 ( 7.2+ 4.4+) 691/ST 1986 06 12.37431 18 30 46.40 +31 06 06.6 0.0 0.8+ 707/ev 1986 06 12.41535 18 30 20.28 +31 01 53.4 ( 2.4- 3.9-) 657/VC 1986 06 12.61395 18 28 15.10 +30 42 00.4 (11.3- 10.0-) 392/JS 1986 06 12.62008 18 28 11.59 +30 41 24.6 ( 6.6- 9.2-) 392/JS 1986 06 13.29069 18 21 22.47 +29 34 23.6 ( 0.9- 2.9-) 657/VC 1986 06 13.33889 18 20 52.94 +29 29 39.8 ( 2.9- 1.3-) 707/ev 1986 06 14.62222 18 08 40.31 +27 21 20.3 (10.9- 1.0-) 392/JS 1986 06 14.62865 18 08 36.99 +27 20 43.4 ( 7.8- 0.5+) 392/JS 1986 06 15.03958 18 04 56.63 +26 39 48.9 1.6+ 0.7- 494/mn 1986 06 25.29139 17 00 55.68 +11 57 16.6 1.9- 0.0 657/VC 1986 06 26.28479 16 56 53.66 +10 49 14.5 1.3- 0.1- 657/VC 1986 06 26.29451 16 56 51.50 +10 48 36.6 1.2+ 1.1+ 657/VC 1986 06 30.70000 16 42 02.90 +06 22 17.8 ( 3.1- 4.3+) 323/PR 1986 07 04.15521 16 33 17.93 +03 27 46.3 2.4- 0.4+ 293/h3 1986 07 04.16076 16 33 17.16 +03 27 25.2 ( 2.5- 5.2-) 293/h3 - continued - P/Machholz NK 495 - 3 Date/ UT R.A. (1950) Decl. *** O-C *** Code/Obs. h m s ! , " " " 1986 07 04.16594 16 33 16.60 +03 27 15.8 0.1+ 0.4+ 801/HO 1986 07 05.30633 16 30 49.91 +02 35 34.3 0.4+ 0.7+ 691/ST 1986 07 05.32098 16 30 48.07 +02 34 56.1 0.6+ 1.4+ 691/ST 1986 07 05.33113 16 30 46.81 +02 34 29.0 0.9+ 1.2+ 691/ST 1986 07 05.33538 16 30 46.25 +02 34 18.7 0.5+ 2.2+ 691/ST 1986 07 07.60104 16 26 29.55 +00 59 15.1 1.1- 0.1+ 323/PR 1986 07 08.14043 16 25 34.45 +00 37 42.2 0.3- 0.9- 801/HO 1986 07 10.29861 16 22 14.86 -00 42 51.2 0.2+ 0.6- 691/ST 1986 07 10.30634 16 22 14.16 -00 43 07.5 0.2- 0.4- 691/ST 1986 07 10.31250 16 22 13.62 -00 43 20.9 0.2- 0.6- 691/ST 1986 07 12.29444 16 19 37.64 -01 51 15.8 0.8- 0.8- 707/ev 1986 07 27.21388 16 09 54.94 -08 09 26.1 0.5+ 0.1- 691/ST 1986 07 27.22100 16 09 54.81 -08 09 34.4 0.2+ 0.0 691/ST 1986 07 27.22722 16 09 54.71 -08 09 42.2 0.1+ 0.5- 691/ST 1986 07 30.24045 16 09 27.29 -09 06 07.8 0.8- 0.6- 691/ST 1986 07 30.26292 16 09 27.12 -09 06 31.9 1.0- 0.6- 691/ST 1986 07 30.26701 16 09 27.10 -09 06 36.6 0.9- 1.0- 691/ST 1986 08 15.19965 16 12 13.47 -13 00 46.2 0.2+ 0.4- 675/PL 1986 08 15.20833 16 12 13.67 -13 00 52.0 0.3+ 0.1+ 675/PL 1986 08 16.21889 16 12 37.85 -13 12 59.1 0.1+ 0.1+ 675/PL 1986 08 16.22750 16 12 38.05 -13 13 05.5 0.1+ 0.2- 675/PL 1986 09 05.13590 16 24 14.67 -16 29 20.2 1.7- 0.9+ 691/ST 1986 09 05.14519 16 24 15.20 -16 29 25.9 0.3+ 0.2- 691/ST 1986 09 05.15014 16 24 15.41 -16 29 27.4 0.3+ 0.7+ 691/ST 1986 09 05.15490 16 24 15.66 -16 29 30.5 0.9+ 0.0 691/ST ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 1987 August 20