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(2011 UG21)
Classification: Aten [NEO]          SPK-ID: 3582232
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | 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 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5470075305924306 3.9059e-07  
a .9369762459443149 1.7652e-08 au
q .4244431834265494 3.5968e-07 au
i 14.56669986775441 1.2529e-05 deg
node 86.60877473425886 0.0001012 deg
peri 82.41077236421931 9.32e-05 deg
M 64.61138893963982 7.7711e-05 deg
tp 2458941.043700658719
(2020-Apr-01.54370066)
7.0393e-05 TDB
period 331.2770103558231
0.91
9.3614e-06
2.563e-08
d
yr
n 1.08670384224165 3.0709e-08 deg/d
Q 1.449509308462081 2.7307e-08 au
  Orbit Determination Parameters
   # obs. used (total)      79  
   data-arc span      3226 days (8.83 yr)  
   first obs. used      2011-10-19  
   last obs. used      2020-08-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      1  
   norm. resid. RMS      .33461  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-19 07:53:38  

Additional Information
 Earth MOID = .128332 au 
 Jupiter MOID = 3.57529 au 
 T_jup = 6.241 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 19.4   n/a MPO477653  

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