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(2011 UG21)
Classification: Aten [NEO]          SPK-ID: 3582232
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

[ hide orbit diagram ]

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.


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5470074557537842 3.7719e-07  
a .936976244677305 1.7055e-08 au
q .4244432529746373 3.4741e-07 au
i 14.56669542527377 1.1702e-05 deg
node 86.60873214575405 8.3606e-05 deg
peri 82.4108135461116 8.0823e-05 deg
M 64.61139568177084 6.3834e-05 deg
tp 2458941.043694575114
(2020-Apr-01.54369458)		 5.7678e-05 TDB
period 331.2770096838777
0.91		 9.0447e-06
2.476e-08		 d
yr
n 1.086703844445865 2.967e-08 deg/d
Q 1.449509236379973 2.6384e-08 au
   Orbit Determination Parameters
   # obs. used (total)      82  
   data-arc span      3369 days (9.22 yr)  
   first obs. used      2011-10-19  
   last obs. used      2021-01-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      1  
   norm. resid. RMS      .36719  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jan-08 05:36:19  

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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