21P/Giacobini-Zinner

Last updated 2018 July 7

+ Orbit O-C

21P/Giacobini-Zinner
From 989 observations 2005 Mar. 12-2018 May 25, mean residual 0".79.
  Nongravitational parameters A1 = +0.33, A2 = -0.1259.

  Epoch  = 2018 Aug. 30.0 TT             JDT = 2458360.5
      T  = 2018 Sept. 10.2769007832 TT   +/- 0.0000456725       0.0000000001
   Peri. = 172.8622022976                +/- 0.0000605861       0.0000000001
   Node  = 195.3931661968 (2000.0)       +/- 0.0000306926       0.0000000000
   Incl. =  31.9978199069                +/- 0.0000087886      -0.0000000000
      q  =   1.0127813760 AU             +/- 0.0000002188      -0.0000000000
      e  =   0.7104727526                +/- 0.0000000612       0.0000000000
     A1  =   0.3268345890                +/- 0.0100184229       0.0000000246
     A2  =  -0.1258813189                +/- 0.0000341441      -0.0000000000
      a  =   3.4980520315 AU             +/- 0.0000003023
      n  =   0.1506484530                +/- 0.0000000195
      P  =   6.5424347144 years          +/- 0.0000008481

  21P             Giacobini-Zinner           *18800223.90440  1.2366316 0.6614897 166.98503 199.79492  33.44829 18800215   47 19001224 19330819  9.0 10.0 h3E1 2.2  x 2  +0.27 +0.0350         Kinoshita  P    6.98   3.6531573                 
  21P             Giacobini-Zinner           *18870218.60562  1.2411317 0.6607208 166.98908 199.83405  33.40893 18870218   47 19001224 19330819  9.0 10.0 h3E1 2.2  x 2  +0.27 +0.0350         Kinoshita  P    7.00   3.6581429                 
  21P             Giacobini-Zinner           *18940213.26027  1.2329251 0.6620302 167.07356 199.77058  33.50346 18940221   47 19001224 19330819  9.0 10.0 h3E1 2.2  x 2  +0.27 +0.0350         Kinoshita  P    6.97   3.6480332                 
    Jupiter  0.1883 AU  18981028.0 TT
  21P/1900 Y1     Giacobini-Zinner            19001128.49587  0.9315160 0.7315644 171.04558 198.13622  29.82922 19001207   47 19001224 19330819  9.0 10.0 h3E1 2.2  1 2  +0.27 +0.0350         Kinoshita  P    6.46   3.4701660                 
  21P             Giacobini-Zinner           *19070519.50892  0.9308188 0.7316965 171.12265 198.06666  29.85169 19070525   47 19001224 19330819  9.0 10.0 h3E1 2.2  x 2  +0.27 +0.0350         Kinoshita  P    6.46   3.4692758                 
  21P/1913 U1     Giacobini-Zinner            19131102.56597  0.9760050 0.7206110 171.47974 197.06942  30.73964 19131109   47 19001224 19330819  9.0 10.0 h3E1 2.2  2 2  +0.27 +0.0350         Kinoshita  P    6.53   3.4933551                 
    Earth    0.5058     19131114.5
  21P             Giacobini-Zinner           *19200518.89257  0.9799902 0.7199368 171.53535 197.01986  30.70950 19200605   47 19001224 19330819  9.0 10.0 h3E1 2.2  x 2  +0.27 +0.0350         Kinoshita  P    6.55   3.4991753                 
  21P             Giacobini-Zinner            19261211.70594  0.9937338 0.7170018 171.74787 196.94551  30.73108 19261231   47 19001224 19330819  9.0 10.0 h3E1 2.2  3 2  +0.27 +0.0350         Kinoshita  P    6.58   3.5114492                 
  21P             Giacobini-Zinner            19330715.14910  0.9995231 0.7159899 171.76700 196.94607  30.67785 19330727   76 19330615 19600418  9.0 10.0 h3E1 1.2  4 2  +0.27 +0.0385         Kinoshita  P    6.60   3.5193225                 
  21P             Giacobini-Zinner            19400217.20987  0.9956024 0.7167010 171.78738 196.95287  30.73531 19400221   76 19330615 19600418  9.0 10.0 h3E1 1.2  5 2  +0.27 +0.0385         Kinoshita  P    6.59   3.5143171                 
  21P             Giacobini-Zinner            19460918.48625  0.9957050 0.7166759 171.80562 196.99635  30.72081 19460917   76 19330615 19600418  9.0 10.0 h3E1 1.2  6 2  +0.27 +0.0385         Kinoshita  P    6.59   3.5143676                 
    Earth    0.2577     19460920.0
  21P             Giacobini-Zinner           *19530416.80141  0.9886868 0.7178988 171.88055 196.94255  30.81851 19530413   44 19460925 19650925  9.0 10.0 h3E1 1.1  x 2  -0.04 +0.1378         Kinoshita  P    6.56   3.5047235                 
    Jupiter  0.9270     19580119.5
  21P             Giacobini-Zinner            19591026.91835  0.9359623 0.7289707 172.83901 196.73257  30.89786 19591108   44 19460925 19650925  9.0 10.0 h3E1 1.1  7 2  -0.04 +0.1378         Kinoshita  P    6.42   3.4533622                 
    Earth    0.3519     19591108.5
  21P             Giacobini-Zinner            19660328.27857  0.9335049 0.7294022 172.91315 196.66816  30.93829 19660316 1091 19650917 19860208  9.0 10.0 h3E2 1.1  8 2  +0.30 -0.0479         Kinoshita  P    6.41   3.4497873                 
    Jupiter  0.5769     19690923.75
  21P             Giacobini-Zinner            19720804.88497  0.9940168 0.7150713 171.89933 195.83407  31.70357 19720722 1091 19650917 19860208  9.0 10.0 h3E2 1.1  9 2  +0.30 -0.0479         Kinoshita  P    6.52   3.4886506                 
  21P             Giacobini-Zinner            19790212.75354  0.9960546 0.7146366 171.96611 195.77235  31.69439 19790216 1091 19650917 19860208  9.0 10.0 h3E2 1.1 10 2  +0.30 -0.0479         Kinoshita  P    6.52   3.4904775                 
  21P             Giacobini-Zinner            19850905.20618  1.0282679 0.7074951 172.48031 195.40858  31.87259 19850912 1534 19850413 19990430  9.0 10.0 h3E1 1.0 11 2  +0.36 +0.0399         Kinoshita  P    6.59   3.5153875                 
    Earth    0.4672     19850905.75
  21P             Giacobini-Zinner            19920413.22832  1.0340271 0.7064862 172.51686 195.38367  31.82209 19920408  907 19910216 20060326  9.0 17.5 h3E2 0.8 12 2  +0.24 -0.0740         Kinoshita  P    6.61   3.5229244                 
  21P             Giacobini-Zinner            19981121.31976  1.0337349 0.7064760 172.54295 195.39778  31.85897 19981103  907 19910216 20060326  9.0 17.5 h3E2 0.8 13 2  +0.24 -0.0740         Kinoshita  P    6.61   3.5218064                 
  21P             Giacobini-Zinner            20050702.76015  1.0379201 0.7056868 172.54267 195.42942  31.81118 20050709 1098 19980120 20120119  9.0 17.5 h3E2 0.8 14 2  +0.14 -0.0985         Kinoshita  P    6.62   3.5265837                 
  21P             Giacobini-Zinner            20120211.73479  1.0304940 0.7070358 172.60336 195.39690  31.91091 20120203  989 20050312 20180525 10.0 17.5 h3E2 0.8 15 2  +0.33 -0.1259         Kinoshita  P    6.60   3.5174747                 
  21P             Giacobini-Zinner            20180910.27690  1.0127814 0.7104728 172.86220 195.39317  31.99782 20180830  989 20050312 20180525 10.0 17.5 h3E2 0.8 16 2  +0.33 -0.1259         Kinoshita  P    6.54   3.4980520                 
    Earth    0.3919     20180910.5
  21P             Giacobini-Zinner           *20250325.42930  1.0089118 0.7110412 172.93540 195.33328  32.05036 20250326  989 20050312 20180525 10.0 17.5 h3E2 0.8  x 2  +0.33 -0.1259         Kinoshita  P    6.52   3.4915425                 
    Jupiter  0.3644     20290214.3
  21P             Giacobini-Zinner           *20310830.31260  1.0691429 0.6992801 170.84103 194.43591  31.66558 20310911  989 20050312 20180525 10.0 17.5 h3E2 0.8  x 2  +0.33 -0.1259         Kinoshita  P    6.70   3.5552779                 
    Earth    0.5500     20310904.0
  21P             Giacobini-Zinner           *20380516.41898  1.0708489 0.6989269 170.90984 194.36813  31.66257 20380517  989 20050312 20180525 10.0 17.5 h3E2 0.8  x 2  +0.33 -0.1259         Kinoshita  P    6.71   3.5567744                 
  21P             Giacobini-Zinner           *20450210.87798  1.0993236 0.6928331 171.33313 194.08274  31.77698 20450301  989 20050312 20180525 10.0 17.5 h3E2 0.8  x 2  +0.33 -0.1259         Kinoshita  P    6.77   3.5789134                 
  21P             Giacobini-Zinner           *20511124.63767  1.1056965 0.6917915 171.36391 194.06946  31.72479 20511105  989 20050312 20180525 10.0 17.5 h3E2 0.8  x 2  +0.33 -0.1259         Kinoshita  P    6.79   3.5874948                 
  21P             Giacobini-Zinner           *20580906.41246  1.1017665 0.6924087 171.38322 194.07661  31.77969 20580820  989 20050312 20180525 10.0 17.5 h3E2 0.8  x 2  +0.33 -0.1259         Kinoshita  P    6.78   3.5819173                 
    Earth    0.4367     20580914.8
  21P             Giacobini-Zinner           *20650614.74569  1.1002595 0.6926041 171.41156 194.12147  31.77481 20650604  989 20050312 20180525 10.0 17.5 h3E2 0.8  x 2  +0.33 -0.1259         Kinoshita  P    6.77   3.5792907                 
  21P             Giacobini-Zinner           *20720321.50590  1.0940731 0.6936012 171.53605 194.05075  31.86935 20720319  989 20050312 20180525 10.0 17.5 h3E2 0.8  x 2  +0.33 -0.1259         Kinoshita  P    6.75   3.5707486                 
    Jupiter  0.2392     20760810.8
  21P             Giacobini-Zinner           *20781019.70793  0.9730421 0.7258366 171.93494 192.24278  27.93859 20781014  989 20050312 20180525 10.0 17.5 h3E2 0.8  x 2  +0.33 -0.1259         Kinoshita  P    6.69   3.5491316                 
    Earth    0.3213     20781101.3
  21P             Giacobini-Zinner           *20850629.88758  0.9732698 0.7258038 172.01596 192.17073  27.94940 20850619  989 20050312 20180525 10.0 17.5 h3E2 0.8  x 2  +0.33 -0.1259         Kinoshita  P    6.69   3.5495375                 
  21P             Giacobini-Zinner           *20920321.64199  1.0133312 0.7168216 172.82355 191.37804  28.46835 20920403  989 20050312 20180525 10.0 17.5 h3E2 0.8  x 2  +0.33 -0.1259         Kinoshita  P    6.77   3.5784194                 
  21P             Giacobini-Zinner           *20990102.26994  1.0183167 0.7160227 172.87115 191.34408  28.43590 20990117  989 20050312 20180525 10.0 17.5 h3E2 0.8  x 2  +0.33 -0.1259         Kinoshita  P    6.79   3.5859086                 
  21P             Giacobini-Zinner           *21051016.00684  1.0177027 0.7160743 172.89172 191.35795  28.46615 21051102  989 20050312 20180525 10.0 17.5 h3E2 0.8  x 2  +0.33 -0.1259         Kinoshita  P    6.79   3.5843974                 
		
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