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(2011 QG21)
Classification: Apollo [NEO]          SPK-ID: 3576726
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 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4384634836838263 2.2757e-06  
a 1.216128040307769 1.1959e-08 au
q .6829003031488395 2.7633e-06 au
i 18.78184302959643 5.8246e-05 deg
node 324.9859600935171 2.702e-05 deg
peri 255.0670880514069 0.0001736 deg
M 256.5392117788867 0.00013778 deg
tp 2459141.279903146745
(2020-Oct-18.77990315)
0.00018861 TDB
period 489.8548136373654
1.34
7.2257e-06
1.978e-08
d
yr
n .7349116309113263 1.0841e-08 deg/d
Q 1.749355777466698 1.7203e-08 au
  Orbit Determination Parameters
   # obs. used (total)      51  
   data-arc span      1482 days (4.06 yr)  
   first obs. used      2011-08-22  
   last obs. used      2015-09-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      1  
   norm. resid. RMS      .36644  
   source      ORB  
   producer      Otto Matic  
   solution date      2017-Apr-06 08:52:57  

Additional Information
 Earth MOID = .0516366 au 
 Jupiter MOID = 3.3639 au 
 T_jup = 5.101 
[ 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 21.7   n/a MPO349278  

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