117P/Helin-Roman-Alu
Last updated 2018 Nov. 14
+ Orbit O-C
117P/Helin-Roman-Alu
From 4119 observations 1988 Aug. 12-2018 Mar. 10, mean residual 0".69.
Nongravitational parameters A1 = +0.08, A2 = +0.0073.
Epoch = 2022 June 30.0 TT JDT = 2459760.5
T = 2022 July 7.7799677110 TT +/- 0.0003300675 -0.0000000006
Peri. = 222.9456423379 +/- 0.0000193636 -0.0000000001
Node = 58.8419010457 (2000.0) +/- 0.0000202768 0.0000000000
Incl. = 8.7039639520 +/- 0.0000040864 0.0000000000
q = 3.0396227495 AU +/- 0.0000005342 -0.0000000000
e = 0.2554828574 +/- 0.0000001026 0.0000000000
A1 = 0.0800130005 +/- 0.0003365142 -0.0000000010
A2 = 0.0073061119 +/- 0.0000408699 -0.0000000001
a = 4.0826766442 AU +/- 0.0000002233
n = 0.1194776295 +/- 0.0000000098
P = 8.2493071940 years +/- 0.0000006767
117P Helin-Roman-Alu *18661014.67429 4.7609150 0.2313108 301.19494 117.34461 6.83943 18661006 4119 19880812 20180310 6.0 12.5 h3E5 0.7 x 3 +0.08 +0.0073 Kinoshita P 15.41 6.1935503
117P Helin-Roman-Alu *18811225.61161 4.7431358 0.3047832 299.84205 110.93610 6.68894 18811226 4119 19880812 20180310 6.0 12.5 h3E5 0.7 x 3 +0.08 +0.0073 Kinoshita P 17.82 6.8225275
Jupiter 0.1131 18830227.8
117P Helin-Roman-Alu *18890305.89432 3.9349641 0.1530346 218.32809 79.73470 10.11091 18890319 4119 19880812 20180310 6.0 12.5 h3E5 0.7 x 3 +0.08 +0.0073 Kinoshita P 10.01 4.6459562
117P Helin-Roman-Alu *18990212.87695 3.9197706 0.1527431 217.92931 79.66311 10.11247 18990126 4119 19880812 20180310 6.0 12.5 h3E5 0.7 x 3 +0.08 +0.0073 Kinoshita P 9.95 4.6264252
117P Helin-Roman-Alu *19090214.63677 3.9509592 0.1514420 218.07359 79.62762 10.09635 19090223 4119 19880812 20180310 6.0 12.5 h3E5 0.7 x 3 +0.08 +0.0073 Kinoshita P 10.05 4.6560859
117P Helin-Roman-Alu *19190315.94604 3.9526516 0.1521731 218.38588 79.51419 10.09400 19190323 4119 19880812 20180310 6.0 12.5 h3E5 0.7 x 3 +0.08 +0.0073 Kinoshita P 10.07 4.6620973
117P Helin-Roman-Alu *19290331.49550 3.9281369 0.1530615 218.59461 79.43273 10.10607 19290419 4119 19880812 20180310 6.0 12.5 h3E5 0.7 x 3 +0.08 +0.0073 Kinoshita P 9.99 4.6380428
117P Helin-Roman-Alu *19390308.48311 3.9095096 0.1544290 218.25357 79.42865 10.11132 19390226 4119 19880812 20180310 6.0 12.5 h3E5 0.7 x 3 +0.08 +0.0073 Kinoshita P 9.94 4.6235143
117P Helin-Roman-Alu *19490415.47638 4.1159199 0.1464768 214.62037 78.45799 9.96474 19490325 4119 19880812 20180310 6.0 12.5 h3E5 0.7 x 3 +0.08 +0.0073 Kinoshita P 10.59 4.8222706
117P Helin-Roman-Alu *19590222.56283 3.7007778 0.1735982 215.71901 73.67136 9.77019 19590313 4119 19880812 20180310 6.0 12.5 h3E5 0.7 x 3 +0.08 +0.0073 Kinoshita P 9.48 4.4781821
117P Helin-Roman-Alu *19680823.53469 3.7262927 0.1718514 215.65617 73.66990 9.75683 19680812 4119 19880812 20180310 6.0 12.5 h3E5 0.7 x 3 +0.08 +0.0073 Kinoshita P 9.54 4.4995459
117P Helin-Roman-Alu *19780325.50671 3.7316462 0.1722814 216.13533 73.56694 9.75010 19780402 4119 19880812 20180310 6.0 12.5 h3E5 0.7 x 3 +0.08 +0.0073 Kinoshita P 9.57 4.5083516
117P/1989 T2 Helin-Roman-Alu 19871012.42614 3.7072320 0.1736077 216.33571 73.50193 9.76140 19871012 4119 19880812 20180310 6.0 12.5 h3E5 0.7 1 3 +0.08 +0.0073 Kinoshita P 9.50 4.4860435
117P Helin-Roman-Alu 19970326.88207 3.7148228 0.1756985 215.07898 73.47170 9.74253 19970313 4119 19880812 20180310 6.0 12.5 h3E5 0.7 * 3 +0.08 +0.0073 Kinoshita P 9.57 4.5066308
Jupiter 0.6846 20020308.2
117P Helin-Roman-Alu 20051219.90467 3.0369806 0.2555905 222.67115 58.93786 8.70801 20051216 4119 19880812 20180310 6.0 12.5 h3E5 0.7 * 3 +0.08 +0.0073 Kinoshita P 8.24 4.0797177
117P Helin-Roman-Alu 20140327.15623 3.0563465 0.2538598 222.68156 58.89721 8.69736 20140413 4119 19880812 20180310 6.0 12.5 h3E5 0.7 * 3 +0.08 +0.0073 Kinoshita P 8.29 4.0962093
117P Helin-Roman-Alu 20220707.77997 3.0396227 0.2554829 222.94564 58.84190 8.70396 20220630 4119 19880812 20180310 5.0 15.0 h3E5 0.7 * 3 +0.08 +0.0073 Kinoshita P 8.25 4.0826766
117P Helin-Roman-Alu *20301126.53585 3.1695997 0.2385917 223.44711 58.09687 8.63483 20301205 4119 19880812 20180310 5.0 15.0 h3E5 0.7 x 3 +0.08 +0.0073 Kinoshita P 8.49 4.1628124
117P Helin-Roman-Alu *20390524.97794 3.1866574 0.2362214 223.36780 58.04487 8.62275 20390512 4119 19880812 20180310 5.0 15.0 h3E5 0.7 x 3 +0.08 +0.0073 Kinoshita P 8.52 4.1722266
117P Helin-Roman-Alu *20471208.74951 3.1836781 0.2365306 223.75143 57.95898 8.62237 20471126 4119 19880812 20180310 5.0 15.0 h3E5 0.7 x 3 +0.08 +0.0073 Kinoshita P 8.52 4.1700141
117P Helin-Roman-Alu *20560530.78922 3.1745894 0.2386468 223.18529 57.93474 8.61884 20560611 4119 19880812 20180310 5.0 15.0 h3E5 0.7 x 3 +0.08 +0.0073 Kinoshita P 8.51 4.1696669
117P Helin-Roman-Alu *20640922.33145 3.0021734 0.2590972 224.09661 56.02547 8.61065 20641007 4119 19880812 20180310 5.0 15.0 h3E5 0.7 x 3 +0.08 +0.0073 Kinoshita P 8.16 4.0520478
117P Helin-Roman-Alu *20721128.43521 3.0172446 0.2576742 224.22317 55.96655 8.60212 20721114 4119 19880812 20180310 5.0 15.0 h3E5 0.7 x 3 +0.08 +0.0073 Kinoshita P 8.19 4.0645827
117P Helin-Roman-Alu *20810131.07096 2.9997076 0.2597561 224.27765 55.92961 8.60811 20810131 4119 19880812 20180310 5.0 15.0 h3E5 0.7 x 3 +0.08 +0.0073 Kinoshita P 8.16 4.0523234
Jupiter 0.2149 20831215.2
117P Helin-Roman-Alu *20910602.32056 3.9454095 0.1940497 331.55216 323.90856 2.09243 20910519 4119 19880812 20180310 5.0 15.0 h3E5 0.7 x 3 +0.08 +0.0073 Kinoshita P 10.83 4.8953510
Jupiter 0.9709 20980820.9
117P Helin-Roman-Alu *21011128.45904 3.5460032 0.2210873 341.68557 320.06476 1.97784 21011123 4119 19880812 20180310 5.0 15.0 h3E5 0.7 x 3 +0.08 +0.0073 Kinoshita P 9.71 4.5525040
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