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15681 (1981 ES17)
Classification: Main-belt Asteroid          SPK-ID: 2015681
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 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09722957112118745 3.2016e-08  
a 2.735175023309373 1.099e-08 au
q 2.469235128851619 8.7518e-08 au
i 2.039823933790164 3.3104e-06 deg
node 257.1699047672558 0.00010152 deg
peri 86.82700330263174 0.00010314 deg
M 73.44337185782838 1.7336e-05 deg
tp 2458663.425253476560
(2019-Jun-28.92525348)
7.9571e-05 TDB
period 1652.251328865208
4.52
9.9579e-06
2.726e-08
d
yr
n .2178845274388453 1.3132e-09 deg/d
Q 3.001114917767128 1.2058e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1636  
   data-arc span      14238 days (38.98 yr)  
   first obs. used      1981-02-09  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48704  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 21:24:45  

Additional Information
 Earth MOID = 1.46248 au 
 Jupiter MOID = 2.34953 au 
 T_jup = 3.345 
[ 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 14.4   n/a MPO439202  

15681 (1981 ES17)          Discovered 1981-Mar-02 by Bus, S. J. at Siding Spring
Reference: 20000726/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1981 ES17 = 1990 EU9 = 2000 KH31 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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