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15686 (1981 EW33)
Classification: Main-belt Asteroid          SPK-ID: 2015686
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 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1149366036698853 4.5978e-08  
a 2.69876521013261 1.3483e-08 au
q 2.388578302777524 1.2736e-07 au
i 2.699711156786147 3.8281e-06 deg
node 251.9455152148976 0.00010005 deg
peri 106.0885612504547 0.00010122 deg
M 168.054961937148 1.6384e-05 deg
tp 2458444.546781395393
(2018-Nov-22.04678140)
7.2386e-05 TDB
period 1619.369970161541
4.43
1.2135e-05
3.322e-08
d
yr
n .2223086796923176 1.666e-09 deg/d
Q 3.008952117487697 1.5032e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1103  
   data-arc span      16031 days (43.89 yr)  
   first obs. used      1977-04-24  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .532  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 01:05:47  

Additional Information
 Earth MOID = 1.38474 au 
 Jupiter MOID = 2.43318 au 
 T_jup = 3.357 
[ 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 14.93   n/a E2021B10  

15686 (1981 EW33)          Discovered 1981-Mar-01 by Bus, S. J. at Siding Spring
Reference: 20000726/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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