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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09729058568260956 3.0975e-08  
a 2.735680047179653 1.0248e-08 au
q 2.469524133149316 8.3663e-08 au
i 2.03954448278763 3.1737e-06 deg
node 257.1683714708074 9.2577e-05 deg
peri 86.93857295990425 9.4055e-05 deg
M 116.8927619804368 1.6461e-05 deg
tp 2458663.861903010933
(2019-Jun-29.36190301)
7.5149e-05 TDB
period 1652.708958561493
4.52
9.2869e-06
2.543e-08
d
yr
n .2178241959269959 1.224e-09 deg/d
Q 3.001835961209991 1.1245e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1902  
   data-arc span      14622 days (40.03 yr)  
   first obs. used      1981-02-09  
   last obs. used      2021-02-21  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47397  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 01:05:39  

Additional Information
 Earth MOID = 1.46097 au 
 Jupiter MOID = 2.34892 au 
 T_jup = 3.344 
[ 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 14.49   n/a E2021B10  

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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