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JPL Small-Body Database Browser
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(2011 UD21)
Classification: Aten [NEO]          SPK-ID: 3582145
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 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03036887733540761 3.8902e-06  
a .9785360000417879 2.0527e-06 au
q .9488189602882384 5.7969e-06 au
i 1.061844178266927 9.2521e-05 deg
node 22.34484470741143 0.00073153 deg
peri 209.8936156649426 0.0036124 deg
M 114.1866299834449 0.0058636 deg
tp 2458888.355909377636
(2020-Feb-08.85590938)
0.0054066 TDB
period 353.5604179745419
0.97
0.0011125
3.046e-06
d
yr
n 1.018213526452845 3.2039e-06 deg/d
Q 1.008253039795337 2.1151e-06 au
  Orbit Determination Parameters
   # obs. used (total)      89  
   data-arc span      37 days  
   first obs. used      2011-10-18  
   last obs. used      2011-11-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      4  
   norm. resid. RMS      .54209  
   source      ORB  
   producer      Otto Matic  
   solution date      2017-Apr-06 08:52:24  

Additional Information
 Earth MOID = .00362811 au 
 Jupiter MOID = 3.95299 au 
 T_jup = 6.184 
[ 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 28.5   n/a MPO215202  

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