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305507 (2008 EK117)
Classification: Main-belt Asteroid          SPK-ID: 2305507
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbit Diagram
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Note: This Java-based orbit viewer will eventually be retired.

Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances. For accurate long-term ephemerides, please instead use our Horizons system.

Note: If the applet is not working, here are some notes that might help.
Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1072772658441813 5.4106e-08  
a 3.071390544171105 3.4035e-08 au
q 2.741900164252757 1.6023e-07 au
i 11.77838747541488 8.0508e-06 deg
node 14.99054482910544 3.1772e-05 deg
peri 134.1009093629477 5.7505e-05 deg
M 131.1071097654285 4.458e-05 deg
tp 2458284.480691295679
(2018-Jun-14.98069130)
0.00024441 TDB
period 1966.079121069345
5.38
3.268e-05
8.947e-08
d
yr
n .1831055506068327 3.0436e-09 deg/d
Q 3.400880924089452 3.7687e-08 au
  Orbit Determination Parameters
   # obs. used (total)      156  
   data-arc span      6823 days (18.68 yr)  
   first obs. used      2000-09-24  
   last obs. used      2019-05-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .65114  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-25 17:55:23  

Additional Information
 Earth MOID = 1.76618 au 
 Jupiter MOID = 1.61659 au 
 T_jup = 3.190 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.3   n/a MPO476361  

305507 (2008 EK117)          Discovered 2008-Mar-08 by Spacewatch at Kitt Peak
Reference: 20111110/Numbers.arcLast Updated: 2011-11-14

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Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1903-Jul-25 05:50 00:05 Jupiter 1.63898494099156 1.63898396752525 1.63898591464719 3.25282533723488 3.08986709357159 2416320.742720359 5.18553411334189 1500.22994579115 35.8175170001688 -88.0989445438099 1758767.94854682 T 9 CATAB v2.0f-lin.ifort 2020-Feb-25 17:55:25 2020-Feb-25 17:55
1952-Jul-03 03:41 00:03 Jupiter 1.86250118610031 1.86249898916825 1.8625033830527 3.89925206637671 3.7808217198096 2434196.653514713 2.98015838776293 374.197542197529 44.4409139513854 -75.1669654820536 1407657.85648026 T 9 CATAB v2.0f-lin.ifort 2020-Feb-25 17:55:25 2020-Feb-25 17:55
1962-Feb-12 10:51 00:03 Jupiter 1.7790435945999 1.77904215805696 1.77904503114325 2.72035847624107 2.53931642616304 2437707.951869016 2.76403188309265 209.267203214678 88.9923089056482 -86.1698939979009 1528133.67799377 T 9 CATAB v2.0f-lin.ifort 2020-Feb-25 17:55:25 2020-Feb-25 17:55
2011-Feb-02 11:52 < 00:01 Jupiter 1.65983721069857 1.65983629047335 1.65983813095917 3.63802095337133 3.49493738357069 2455594.994195351 0.506614828246538 634.787807535018 25.8766442321146 -87.0347798976089 1586455.98428445 T 9 CATAB v2.0f-lin.ifort 2020-Feb-25 17:55:25 2020-Feb-25 17:55
2069-Sep-12 23:37 00:03 Jupiter 1.62268443855717 1.62268356355132 1.6226853137119 3.33844464006174 3.17824412818045 2477002.484254792 2.64672597439407 1582.90585885437 31.1310039613652 -88.8397651935137 1818860.12171154 T 9 CATAB v2.0f-lin.ifort 2020-Feb-25 17:55:25 2020-Feb-25 17:55
2118-Aug-25 08:33 00:05 Jupiter 1.86823487850624 1.86823142671814 1.86823833033638 3.77212011682307 3.64994901812761 2494879.856119663 5.13928048114997 508.325191583621 48.3310243283797 -71.5626296342329 1323356.35800468 T 9 CATAB v2.0f-lin.ifort 2020-Feb-25 17:55:25 2020-Feb-25 17:55
2128-Apr-09 02:18 00:06 Jupiter 1.7655247075677 1.76552136298316 1.76552805215635 2.91042717916583 2.7406336364462 2498394.595555780 5.92115242869842 272.044475711267 158.217032115876 -60.1256913488765 1727763.81524948 T 9 CATAB v2.0f-lin.ifort 2020-Feb-25 17:55:25 2020-Feb-25 17:55
2177-Mar-23 23:29 00:08 Jupiter 1.66004384394889 1.66004109691494 1.66004659125451 3.61143532659298 3.46727313835571 2516275.478637309 7.58092173333213 1213.20247983145 48.3333664253935 -84.2703511868911 1206377.78068713 T 9 CATAB v2.0f-lin.ifort 2020-Feb-25 17:55:25 2020-Feb-25 17:55

Alternate Designations
 2008 EK117 = 2005 SE197 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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