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39495 (1981 EP11)
Classification: Main-belt Asteroid          SPK-ID: 2039495
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 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2280665329081621 4.9487e-08  
a 2.279663606048164 1.0718e-08 au
q 1.759748631219841 1.16e-07 au
i 5.536330208196874 5.2093e-06 deg
node 325.3271412647085 4.3515e-05 deg
peri 22.76713583303341 4.4427e-05 deg
M 334.2531877826486 1.1901e-05 deg
tp 2459090.413631894907
(2020-Aug-28.91363190)
4.1985e-05 TDB
period 1257.200588908333
3.44
8.8665e-06
2.428e-08
d
yr
n .2863504862916104 2.0195e-09 deg/d
Q 2.799578580876487 1.3163e-08 au
  Orbit Determination Parameters
   # obs. used (total)      870  
   data-arc span      14366 days (39.33 yr)  
   first obs. used      1981-02-09  
   last obs. used      2020-06-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5916  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 21:01:29  

Additional Information
 Earth MOID = .754373 au 
 Jupiter MOID = 2.62721 au 
 T_jup = 3.565 
[ 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 15.4   n/a MPO324665  

39495 (1981 EP11)          Discovered 1981-Mar-07 by Bus, S. J. at Siding Spring
Reference: 20020526/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1981 EP11 = 1989 TB8 = 1996 VM29 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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