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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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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer 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.


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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
(2018-Sep-12.01808652)
9.9589e-05 TDB
period 1302.942464014452
3.57
1.3311e-05
3.644e-08
d
yr
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

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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