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129447 (1981 EP33)
Classification: Main-belt Asteroid          SPK-ID: 2129447
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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 .06084069571128987 5.7472e-08  
a 2.318293144136162 1.2866e-08 au
q 2.177246576384205 1.344e-07 au
i 6.285677322928264 5.6492e-06 deg
node 206.5946481486826 3.5942e-05 deg
peri 6.807623326780559 5.2115e-05 deg
M 4.952095188549521 3.5319e-05 deg
tp 2458982.764745029763
(2020-May-13.26474503)
0.00012652 TDB
period 1289.291006370043
3.53
1.0733e-05
2.939e-08
d
yr
n .2792232306138304 2.3244e-09 deg/d
Q 2.45933971188812 1.3648e-08 au
  Orbit Determination Parameters
   # obs. used (total)      337  
   data-arc span      14317 days (39.20 yr)  
   first obs. used      1981-02-14  
   last obs. used      2020-04-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57161  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 21:44:23  

Additional Information
 Earth MOID = 1.17102 au 
 Jupiter MOID = 2.50351 au 
 T_jup = 3.569 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.8   n/a MPO469350  

129447 (1981 EP33)          Discovered 1981-Mar-01 by Bus, S. J. at Siding Spring
Reference: 20060711/Numbers.arcLast Updated: 2006-07-17

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