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58121 (1981 EA13)
Classification: Main-belt Asteroid          SPK-ID: 2058121
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 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1438175461900213 4.6624e-08  
a 2.382346135619803 1.0868e-08 au
q 2.039722960219684 1.0853e-07 au
i 5.958961091287219 3.8868e-06 deg
node 249.9463177739366 4.8967e-05 deg
peri 74.94544586472651 5.151e-05 deg
M 105.8304852661565 1.477e-05 deg
tp 2458605.666489311646
(2019-May-02.16648931)
5.4825e-05 TDB
period 1343.09186516848
3.68
9.1908e-06
2.516e-08
d
yr
n .2680382551158114 1.8342e-09 deg/d
Q 2.724969311019923 1.2431e-08 au
  Orbit Determination Parameters
   # obs. used (total)      861  
   data-arc span      14498 days (39.69 yr)  
   first obs. used      1981-02-09  
   last obs. used      2020-10-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52978  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 22:52:16  

Additional Information
 Earth MOID = 1.03739 au 
 Jupiter MOID = 2.58617 au 
 T_jup = 3.516 
[ 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 15.6   n/a MPO502539  

58121 (1981 EA13)          Discovered 1981-Mar-01 by Bus, S. J. at Siding Spring
Reference: 20030614/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1981 EA13 = 2001 XY56 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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