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118169 (1981 EL40)
Classification: Main-belt Asteroid          SPK-ID: 2118169
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 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1141205955405152 7.3536e-08  
a 2.689723605761033 2.3187e-08 au
q 2.382770746032202 2.0483e-07 au
i 4.640784820914743 6.7284e-06 deg
node 341.1503373528924 5.4703e-05 deg
peri 202.9256213589892 5.9022e-05 deg
M 313.7982479959368 2.4374e-05 deg
tp 2459207.283485985964
(2020-Dec-23.78348599)
0.00011048 TDB
period 1611.238789135104
4.41
2.0834e-05
5.704e-08
d
yr
n .2234305693405285 2.8891e-09 deg/d
Q 2.996676465489864 2.5833e-08 au
  Orbit Determination Parameters
   # obs. used (total)      365  
   data-arc span      14227 days (38.95 yr)  
   first obs. used      1981-02-09  
   last obs. used      2020-01-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58784  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 05:54:49  

Additional Information
 Earth MOID = 1.38588 au 
 Jupiter MOID = 1.97173 au 
 T_jup = 3.358 
[ 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 16.1   n/a MPO453652  

118169 (1981 EL40)          Discovered 1981-Mar-02 by Bus, S. J. at Siding Spring
Reference: 20051116/Numbers.arcLast Updated: 2005-11-21

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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