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15687 (1981 ES38)
Classification: Main-belt Asteroid          SPK-ID: 2015687
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1314612069273154 3.7582e-08  
a 2.382234553096128 7.9907e-09 au
q 2.069063123562157 8.9315e-08 au
i 6.572526072977251 4.0398e-06 deg
node 197.7936010066374 2.7951e-05 deg
peri 146.1430400394166 3.1666e-05 deg
M 81.36148634359294 1.2945e-05 deg
tp 2458696.977018723038
(2019-Aug-01.47701872)
4.8481e-05 TDB
period 1342.997506194295
3.68
6.7572e-06
1.85e-08
d
yr
n .2680570874775086 1.3487e-09 deg/d
Q 2.695405982630099 9.0412e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1302  
   data-arc span      14521 days (39.76 yr)  
   first obs. used      1981-02-12  
   last obs. used      2020-11-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52811  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-17 20:27:51  

Additional Information
 Earth MOID = 1.06575 au 
 Jupiter MOID = 2.71623 au 
 T_jup = 3.517 
[ 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 14.9   n/a MPO347648  

15687 (1981 ES38)          Discovered 1981-Mar-01 by Bus, S. J. at Siding Spring
Reference: 20000726/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1981 ES38 = 1996 GS17 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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