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312538 (2009 EH20)
Classification: Main-belt Asteroid          SPK-ID: 2312538
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09605522841328445 4.8812e-08  
a 2.338015739364953 1.7635e-08 au
q 2.113437103486398 1.0898e-07 au
i 3.083813370879232 5.0733e-06 deg
node 96.16910691758133 9.9173e-05 deg
peri 83.44827293217925 0.00010405 deg
M 45.48905718910366 2.874e-05 deg
tp 2458835.503775174730
(2019-Dec-18.00377517)
0.0001045 TDB
period 1305.778677499728
3.58
1.4774e-05
4.045e-08
d
yr
n .275697563609569 3.1193e-09 deg/d
Q 2.562594375243508 1.9329e-08 au
  Orbit Determination Parameters
   # obs. used (total)      177  
   data-arc span      9629 days (26.36 yr)  
   first obs. used      1993-12-16  
   last obs. used      2020-04-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54136  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-21 20:27:26  

Additional Information
 Earth MOID = 1.11926 au 
 Jupiter MOID = 2.39792 au 
 T_jup = 3.558 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 17.5   n/a MPO471272  

312538 (2009 EH20)          Discovered 2009-Mar-15 by La Sagra at La Sagra
Reference: 20120109/Numbers.arcLast Updated: 2012-01-11

Alternate Designations
 2009 EH20 = 2004 XT60 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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