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39504 (1981 EZ39)
Classification: Main-belt Asteroid          SPK-ID: 2039504
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 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1346453894819212 3.9205e-08  
a 2.284318219701645 9.1413e-09 au
q 1.976745303309269 9.1685e-08 au
i 4.093216218801342 5.2866e-06 deg
node 1.650125351026285 5.2367e-05 deg
peri 46.79530503868078 5.5846e-05 deg
M 245.7603942861912 1.8765e-05 deg
tp 2459400.672764193345
(2021-Jul-05.17276419)
6.6365e-05 TDB
period 1261.052979038692
3.45
7.5697e-06
2.072e-08
d
yr
n .2854757143307571 1.7136e-09 deg/d
Q 2.591891136094022 1.0372e-08 au
  Orbit Determination Parameters
   # obs. used (total)      869  
   data-arc span      14335 days (39.25 yr)  
   first obs. used      1981-03-02  
   last obs. used      2020-05-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5414  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 21:01:51  

Additional Information
 Earth MOID = .989061 au 
 Jupiter MOID = 2.76457 au 
 T_jup = 3.588 
[ 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 15.7   n/a MPO474252  

39504 (1981 EZ39)          Discovered 1981-Mar-02 by Bus, S. J. at Siding Spring
Reference: 20020526/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1981 EZ39 = 2000 UV100 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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