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JPL Small-Body Database Browser
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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1355218055842274 4.1277e-08  
a 2.282746277511852 9.4819e-09 au
q 1.973384380292772 9.5992e-08 au
i 4.094664950300481 5.758e-06 deg
node 1.703605178235418 5.3934e-05 deg
peri 46.77066583089812 5.7957e-05 deg
M 131.4965882523019 1.9609e-05 deg
tp 2458140.352702245103
(2018-Jan-21.85270225)
6.8382e-05 TDB
period 1259.751522023713
3.45
7.849e-06
2.149e-08
d
yr
n .2857706410401333 1.7805e-09 deg/d
Q 2.592108174730932 1.0767e-08 au
  Orbit Determination Parameters
   # obs. used (total)      850  
   data-arc span      13939 days (38.16 yr)  
   first obs. used      1981-03-02  
   last obs. used      2019-05-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54074  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 02:07:01  

Additional Information
 Earth MOID = .985199 au 
 Jupiter MOID = 2.76535 au 
 T_jup = 3.589 
[ 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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