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(2011 WP4)
Classification: Apollo [NEO]          SPK-ID: 3588062
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 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4144110999248192 0.00018908  
a 1.360075636714385 0.00034556 au
q .7964451961226279 5.4803e-05 au
i .9464755366409002 0.00059371 deg
node 227.7940575797023 0.023758 deg
peri 263.8585653176472 0.025985 deg
M 102.6613979511495 0.58642 deg
tp 2458835.285678359161
(2019-Dec-17.78567836)
0.88077 TDB
period 579.3526776150456
1.59
0.2208
0.0006045
d
yr
n .6213831641927858 0.00023682 deg/d
Q 1.923706077306142 0.00048877 au
  Orbit Determination Parameters
   # obs. used (total)      58  
   data-arc span      5 days  
   first obs. used      2011-11-18  
   last obs. used      2011-11-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      6  
   norm. resid. RMS      .4702  
   source      ORB  
   producer      Otto Matic  
   solution date      2017-Apr-06 08:51:58  

Additional Information
 Earth MOID = .00385114 au 
 Jupiter MOID = 3.13404 au 
 T_jup = 4.756 
[ 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 27.2   n/a MPO216324  

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