21P/Giacobini-Zinner

Last updated 2018 Aug. 23

+ Orbit O-C

21P/Giacobini-Zinner
From 2210 observations 2005 Mar. 5-2018 Aug. 12, mean residual 0".56.
  Nongravitational parameters A1 = -0.03, A2 = -0.1245.

  Epoch  = 2018 Aug. 30.0 TT             JDT = 2458360.5
      T  = 2018 Sept. 10.2782328566 TT   +/- 0.0000675046       0.0000000001
   Peri. = 172.8617052844                +/- 0.0000775153      -0.0000000003
   Node  = 195.3920445808 (2000.0)       +/- 0.0000216570       0.0000000007
   Incl. =  31.9978073768                +/- 0.0000046176       0.0000000001
      q  =   1.0128183112 AU             +/- 0.0000002744      -0.0000000000
      e  =   0.7104725233                +/- 0.0000000775       0.0000000000
     A1  =  -0.0250370631                +/- 0.0060816932      -0.0000000069
     A2  =  -0.1245188036                +/- 0.0000217877      -0.0000000001
      a  =   3.4981768319 AU             +/- 0.0000003809
      n  =   0.1506403913                +/- 0.0000000246
      P  =   6.5427848404 years          +/- 0.0000010686

  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            20120211.73316  1.0305338 0.7070348 172.60110 195.39579  31.91088 20120203 2210 20050305 20180812 10.0 17.5 h3E2 0.6 15 2  -0.03 -0.1245         Kinoshita  P    6.60   3.5175974                 
  21P             Giacobini-Zinner            20180910.27823  1.0128183 0.7104725 172.86171 195.39204  31.99781 20180830 2210 20050305 20180812 10.0 17.5 h3E2 0.6 16 2  -0.03 -0.1245         Kinoshita  P    6.54   3.4981768                 
    Earth    0.3918     20180910.5
  21P             Giacobini-Zinner           *20250325.43480  1.0089486 0.7110416 172.93692 195.33216  32.05034 20250326 2210 20050305 20180812 10.0 17.5 h3E2 0.6  x 2  -0.03 -0.1245         Kinoshita  P    6.52   3.4916748                 
    Jupiter  0.3643     20290214.3
  21P             Giacobini-Zinner           *20310830.30867  1.0691392 0.6992902 170.84444 194.43461  31.66458 20310911 2210 20050305 20180812 10.0 17.5 h3E2 0.6  x 2  -0.03 -0.1245         Kinoshita  P    6.70   3.5553853                 
    Earth    0.5501     20310904.0
  21P             Giacobini-Zinner           *20380516.41143  1.0708447 0.6989376 170.91481 194.36684  31.66157 20380517 2210 20050305 20180812 10.0 17.5 h3E2 0.6  x 2  -0.03 -0.1245         Kinoshita  P    6.71   3.5568865                 
  21P             Giacobini-Zinner           *20450210.87620  1.0993310 0.6928407 171.34038 194.08133  31.77606 20450301 2210 20050305 20180812 10.0 17.5 h3E2 0.6  x 2  -0.03 -0.1245         Kinoshita  P    6.77   3.5790250                 
  21P             Giacobini-Zinner           *20511124.64651  1.1057040 0.6917990 171.37228 194.06803  31.72387 20511105 2210 20050305 20180812 10.0 17.5 h3E2 0.6  x 2  -0.03 -0.1245         Kinoshita  P    6.80   3.5876066                 
  21P             Giacobini-Zinner           *20580906.43564  1.1017751 0.6924164 171.39339 194.07521  31.77876 20580820 2210 20050305 20180812 10.0 17.5 h3E2 0.6  x 2  -0.03 -0.1245         Kinoshita  P    6.78   3.5820351                 
    Earth    0.4364     20580914.8
  21P             Giacobini-Zinner           *20650614.78781  1.1002709 0.6926118 171.42359 194.12006  31.77384 20650604 2210 20050305 20180812 10.0 17.5 h3E2 0.6  x 2  -0.03 -0.1245         Kinoshita  P    6.77   3.5794188                 
  21P             Giacobini-Zinner           *20720321.57116  1.0940820 0.6936101 171.54997 194.04937  31.86837 20720319 2210 20050305 20180812 10.0 17.5 h3E2 0.6  x 2  -0.03 -0.1245         Kinoshita  P    6.75   3.5708811                 
    Jupiter  0.2397     20760810.8
  21P             Giacobini-Zinner           *20781019.88461  0.9727230 0.7259003 171.96293 192.24201  27.94545 20781014 2210 20050305 20180812 10.0 17.5 h3E2 0.6  x 2  -0.03 -0.1245         Kinoshita  P    6.69   3.5487924                 
    Earth    0.3237     20781101.5
  21P             Giacobini-Zinner           *20850629.56342  0.9729455 0.7258680 172.04556 192.17000  27.95630 20850619 2210 20050305 20180812 10.0 17.5 h3E2 0.6  x 2  -0.03 -0.1245         Kinoshita  P    6.69   3.5491863                 
  21P             Giacobini-Zinner           *20920320.79090  1.0131150 0.7168553 172.85621 191.37449  28.47869 20920403 2210 20050305 20180812 10.0 17.5 h3E2 0.6  x 2  -0.03 -0.1245         Kinoshita  P    6.77   3.5780825                 
  21P             Giacobini-Zinner           *20981231.93978  1.0180957 0.7160566 172.90562 191.34040  28.44623 20990117 2210 20050305 20180812 10.0 17.5 h3E2 0.6  x 2  -0.03 -0.1245         Kinoshita  P    6.79   3.5855585                 
  21P             Giacobini-Zinner           *21051014.22031  1.0175300 0.7161116 172.92844 191.35425  28.47613 21051102 2210 20050305 20180812 10.0 17.5 h3E2 0.6  x 2  -0.03 -0.1245         Kinoshita  P    6.79   3.5842608                 
    Earth    0.2361     21051022.8
		
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