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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09734757833451099 3.0945e-08  
a 2.735761379999798 1.0246e-08 au
q 2.469441634755738 8.3548e-08 au
i 2.039286079771416 3.1552e-06 deg
node 257.1589955145647 9.2311e-05 deg
peri 87.01268093000749 9.3773e-05 deg
M 159.5056544930339 1.6434e-05 deg
tp 2458664.199499067299
(2019-Jun-29.69949907)
7.4826e-05 TDB
period 1652.782662618935
4.53
9.2846e-06
2.542e-08
d
yr
n .2178144822922804 1.2236e-09 deg/d
Q 3.002081125243859 1.1243e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1919  
   data-arc span      14666 days (40.15 yr)  
   first obs. used      1981-02-09  
   last obs. used      2021-04-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47462  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 17:30:09  

Additional Information
 Earth MOID = 1.46192 au 
 Jupiter MOID = 2.34816 au 
 T_jup = 3.344 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457111.5 (2015-Mar-30.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09947016302275785 3.1212e-08  
q 2.462460276480153 8.4502e-08 au
tp 2457007.787054249501
(2014-Dec-16.28705425)
7.1654e-05 TDB
node 257.3550986565702 9.2624e-05 deg
peri 85.93931673950979 9.3983e-05 deg
i 2.035067438931079 3.1525e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1919  
   data-arc span      14666 days (40.15 yr)  
   first obs. used      1981-02-09  
   last obs. used      2021-04-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47462  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 17:30:09  

Additional Information
 Jupiter MOID = 2.34816 au 
 T_jup = 3.344 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.742013319427837E-16 -2.622317970143476E-15 -1.222305716220454E-13 -1.750984382325214E-15 -4.924927073514105E-14 -2.421573417213836E-16
q -2.622317970143476E-15 7.140523879174137E-15 3.484390003152227E-13 5.810786478322431E-15 1.360057879316113E-13 7.493027685071759E-16
tp -1.222305716220454E-13 3.484390003152227E-13 5.134324155911791E-9 -8.294076638641345E-13 1.152753004313825E-9 -7.173954554440393E-14
node -1.750984382325214E-15 5.810786478322431E-15 -8.294076638641345E-13 8.579160438250622E-9 -8.573754148026054E-9 1.474659858204016E-11
peri -4.924927073514105E-14 1.360057879316113E-13 1.152753004313825E-9 -8.573754148026054E-9 8.832774196821427E-9 -1.475306185297143E-11
i -2.421573417213836E-16 7.493027685071759E-16 -7.173954554440393E-14 1.474659858204016E-11 -1.475306185297143E-11 9.938077690983775E-12

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.49   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

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