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161921 (2007 EX56)
Classification: Main-belt Asteroid          SPK-ID: 2161921
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 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1134253283317824 4.7695e-08  
a 2.334628991560256 1.5901e-08 au
q 2.069822931659635 1.0712e-07 au
i 7.73587397939522 4.3594e-06 deg
node 98.15099494436403 4.2469e-05 deg
peri 167.574295195664 4.9972e-05 deg
M 173.2336577310201 2.8127e-05 deg
tp 2458373.518086515857
9.9589e-05 TDB
period 1302.942464014452
n .2762976953647026 2.8227e-09 deg/d
Q 2.599435051460876 1.7704e-08 au
  Orbit Determination Parameters
   # obs. used (total)      442  
   data-arc span      7231 days (19.80 yr)  
   first obs. used      2000-03-11  
   last obs. used      2019-12-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57434  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 13:43:09  

Additional Information
 Earth MOID = 1.05453 au 
 Jupiter MOID = 2.47283 au 
 T_jup = 3.548 
[ 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 MPO502937  

161921 (2007 EX56)          Discovered 2007-Mar-14 by Lowe, A. at Mayhill
Reference: 20070828/Numbers.arcLast Updated: 2007-08-30

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Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
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
2106-Aug-27 22:56 00:02 Amphi 0.0314230818289462 0.0314066412727004 0.031439533116305 4.76654351067137 4.76654347228998 2490499.455433764 1.5528538902264 1230.46483764274 56.3792079513419 -48.2872120058308 62269.1520452769 T 18 CATAB v2.0f-lin.ifort 2020-Feb-24 13:43:23 2020-Feb-24 13:43
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
FirstGov 2020-Dec-01 09:56 UT
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