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JPL Small-Body Database Browser
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17381 (1981 EC11)
Classification: Main-belt Asteroid          SPK-ID: 2017381
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1149035855715136 3.839e-08  
a 2.67127873735242 1.5225e-08 au
q 2.364339232369681 1.0167e-07 au
i 4.402215409420871 4.358e-06 deg
node 286.1227234229264 6.4808e-05 deg
peri 2.690265687684914 6.8734e-05 deg
M 167.6708973946006 2.1884e-05 deg
tp 2457857.767503628853
(2017-Apr-14.26750363)
9.8094e-05 TDB
period 1594.693550570948
4.37
1.3633e-05
3.733e-08
d
yr
n .2257487025460843 1.93e-09 deg/d
Q 2.978218242335159 1.6974e-08 au
  Orbit Determination Parameters
   # obs. used (total)      997  
   data-arc span      14264 days (39.05 yr)  
   first obs. used      1979-12-20  
   last obs. used      2019-01-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55793  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-12 22:18:51  

Additional Information
 Earth MOID = 1.34736 au 
 Jupiter MOID = 2.17054 au 
 T_jup = 3.367 
[ 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 14.8   n/a MPO381403  

17381 (1981 EC11)          Discovered 1981-Mar-01 by Bus, S. J. at Siding Spring
Reference: 20001013/Numbers.arcLast Updated: 2004-04-19

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