117P/Helin-Roman-Alu

Last updated 2017 June 14

+ Orbit O-C

117P/Helin-Roman-Alu
From 4104 observations 1988 Aug. 10-2017 Mar. 17, mean residual 0".69.
  Nongravitational parameters A1 = +0.08, A2 = +0.0073.

  Epoch  = 2014 Apr. 13.0 TT             JDT = 2456760.5
      T  = 2014 Mar. 27.1562450021 TT    +/- 0.0003280254       0.0000000000
   Peri. = 222.6815652662                +/- 0.0000192983       0.0000000000
   Node  =  58.8972053763 (2000.0)       +/- 0.0000203135       0.0000000000
   Incl. =   8.6973643958                +/- 0.0000040799      -0.0000000000
      q  =   3.0563464501 AU             +/- 0.0000005327       0.0000000000
      e  =   0.2538597908                +/- 0.0000001024      -0.0000000000
     A1  =   0.0797702994                +/- 0.0003378392       0.0000000000
     A2  =   0.0072671282                +/- 0.0000408424       0.0000000000
      a  =   4.0962092814 AU             +/- 0.0000002219
      n  =   0.1188860418                +/- 0.0000000097
      P  =   8.2903564911 years          +/- 0.0000006735

 117P             Helin-Roman-Alu            *18990212.87872  3.9197688 0.1527435 217.92920  79.66299  10.11246 18990126 4104 19880810 20170317  5.0 15.0 h3E3 0.7  x 3  +0.08 +0.0073         Kinoshita  P    9.95   4.6264250                 
 117P             Helin-Roman-Alu            *19090214.63818  3.9509574 0.1514423 218.07348  79.62749  10.09634 19090223 4104 19880810 20170317  5.0 15.0 h3E3 0.7  x 3  +0.08 +0.0073         Kinoshita  P   10.05   4.6560856                 
 117P             Helin-Roman-Alu            *19190315.94717  3.9526500 0.1521734 218.38578  79.51407  10.09400 19190323 4104 19880810 20170317  5.0 15.0 h3E3 0.7  x 3  +0.08 +0.0073         Kinoshita  P   10.07   4.6620971                 
 117P             Helin-Roman-Alu            *19290331.49650  3.9281353 0.1530618 218.59452  79.43260  10.10606 19290419 4104 19880810 20170317  5.0 15.0 h3E3 0.7  x 3  +0.08 +0.0073         Kinoshita  P    9.99   4.6380426                 
 117P             Helin-Roman-Alu            *19390308.48390  3.9095078 0.1544293 218.25349  79.42853  10.11132 19390226 4104 19880810 20170317  5.0 15.0 h3E3 0.7  x 3  +0.08 +0.0073         Kinoshita  P    9.94   4.6235138                 
 117P             Helin-Roman-Alu            *19490415.47487  4.1159141 0.1464773 214.62032  78.45789   9.96474 19490325 4104 19880810 20170317  5.0 15.0 h3E3 0.7  x 3  +0.08 +0.0073         Kinoshita  P   10.59   4.8222666                 
 117P             Helin-Roman-Alu            *19590222.56068  3.7007779 0.1735983 215.71896  73.67135   9.77019 19590313 4104 19880810 20170317  5.0 15.0 h3E3 0.7  x 3  +0.08 +0.0073         Kinoshita  P    9.48   4.4781827                 
 117P             Helin-Roman-Alu            *19680823.53321  3.7262928 0.1718515 215.65613  73.66990   9.75683 19680812 4104 19880810 20170317  5.0 15.0 h3E3 0.7  x 3  +0.08 +0.0073         Kinoshita  P    9.54   4.4995464                 
 117P             Helin-Roman-Alu            *19780325.50578  3.7316463 0.1722815 216.13530  73.56694   9.75011 19780402 4104 19880810 20170317  5.0 15.0 h3E3 0.7  x 3  +0.08 +0.0073         Kinoshita  P    9.57   4.5083520                 
 117P/1989 T2     Helin-Roman-Alu             19871012.42561  3.7072320 0.1736077 216.33569  73.50193   9.76140 19871012 4104 19880810 20170317  5.0 15.0 h3E3 0.7  1 3  +0.08 +0.0073         Kinoshita  P    9.50   4.4860438                 
 117P             Helin-Roman-Alu             19970326.88183  3.7148227 0.1756985 215.07897  73.47169   9.74253 19970313 4104 19880810 20170317  5.0 15.0 h3E3 0.7  * 3  +0.08 +0.0073         Kinoshita  P    9.57   4.5066310                 
    Jupiter  0.6846     20020308.1
 117P             Helin-Roman-Alu             20051219.90464  3.0369806 0.2555905 222.67115  58.93786   8.70801 20051216 4104 19880810 20170317  5.0 15.0 h3E3 0.7  * 3  +0.08 +0.0073         Kinoshita  P    8.24   4.0797179                 
 117P             Helin-Roman-Alu             20140327.15624  3.0563465 0.2538598 222.68157  58.89721   8.69736 20140413 4104 19880810 20170317  5.0 15.0 h3E3 0.7  * 3  +0.08 +0.0073         Kinoshita  P    8.29   4.0962093                 
 117P             Helin-Roman-Alu            *20220707.77986  3.0396227 0.2554829 222.94566  58.84190   8.70396 20220630 4104 19880810 20170317  5.0 15.0 h3E3 0.7  x 3  +0.08 +0.0073         Kinoshita  P    8.25   4.0826765                 
 117P             Helin-Roman-Alu            *20301126.53561  3.1695999 0.2385917 223.44714  58.09687   8.63483 20301205 4104 19880810 20170317  5.0 15.0 h3E3 0.7  x 3  +0.08 +0.0073         Kinoshita  P    8.49   4.1628122                 
 117P             Helin-Roman-Alu            *20390524.97746  3.1866575 0.2362213 223.36784  58.04487   8.62275 20390512 4104 19880810 20170317  5.0 15.0 h3E3 0.7  x 3  +0.08 +0.0073         Kinoshita  P    8.52   4.1722264                 
 117P             Helin-Roman-Alu            *20471208.74862  3.1836781 0.2365305 223.75148  57.95897   8.62237 20471126 4104 19880810 20170317  5.0 15.0 h3E3 0.7  x 3  +0.08 +0.0073         Kinoshita  P    8.52   4.1700137                 
 117P             Helin-Roman-Alu            *20560530.78772  3.1745894 0.2386467 223.18534  57.93474   8.61884 20560611 4104 19880810 20170317  5.0 15.0 h3E3 0.7  x 3  +0.08 +0.0073         Kinoshita  P    8.51   4.1696665                 
 117P             Helin-Roman-Alu            *20640922.32999  3.0021763 0.2590967 224.09661  56.02551   8.61065 20641007 4104 19880810 20170317  5.0 15.0 h3E3 0.7  x 3  +0.08 +0.0073         Kinoshita  P    8.16   4.0520489                 
 117P             Helin-Roman-Alu            *20721128.43485  3.0172474 0.2576737 224.22318  55.96659   8.60212 20721114 4104 19880810 20170317  5.0 15.0 h3E3 0.7  x 3  +0.08 +0.0073         Kinoshita  P    8.19   4.0645836                 
 117P             Helin-Roman-Alu            *20810131.07150  2.9997103 0.2597556 224.27766  55.92965   8.60811 20810131 4104 19880810 20170317  5.0 15.0 h3E3 0.7  x 3  +0.08 +0.0073         Kinoshita  P    8.16   4.0523242                 
    Jupiter  0.2149     20831215.3
 117P             Helin-Roman-Alu            *20910602.33794  3.9454219 0.1940498 331.55041 323.91100   2.09243 20910519 4104 19880810 20170317  5.0 15.0 h3E3 0.7  x 3  +0.08 +0.0073         Kinoshita  P   10.83   4.8953669                 
    Jupiter  0.9708     20980821.0
 117P             Helin-Roman-Alu            *21011128.48037  3.5459451 0.2210935 341.68586 320.06637   1.97780 21011123 4104 19880810 20170317  5.0 15.0 h3E3 0.7  x 3  +0.08 +0.0073         Kinoshita  P    9.71   4.5524659                 
		
[Numbered short periodic comets index] [Main index] inserted by FC2 system