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JPL Small-Body Database Browser
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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .546966338202141 9.6223e-07  
a .9369736392387846 5.7752e-08 au
q .4244805987924127 8.7631e-07 au
i 14.56763816936303 1.6877e-05 deg
node 86.61443392642863 0.00011025 deg
peri 82.42177508146415 0.0001039 deg
M 349.8897398932567 0.00013144 deg
tp 2458609.803563236873
(2019-May-06.30356324)		 0.00012173 TDB
period 331.2756279178722
0.91		 3.0628e-05
8.385e-08		 d
yr
n 1.086708377137992 1.0047e-07 deg/d
Q 1.449466679685157 8.934e-08 au
   Orbit Determination Parameters
   # obs. used (total)      76  
   data-arc span      2845 days (7.79 yr)  
   first obs. used      2011-10-19  
   last obs. used      2019-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      1  
   norm. resid. RMS      .30706  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Aug-04 05:59:04  

Additional Information
 Earth MOID = .128709 au 
 Jupiter MOID = 3.5768 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 19.5   n/a MPO456805  

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