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20980 (1981 ED16)
Classification: Main-belt Asteroid          SPK-ID: 2020980
[ 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 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1448291443762866 3.5118e-08  
a 2.256101733413871 6.9815e-09 au
q 1.929352449737683 7.9788e-08 au
i 3.585237288601698 3.6888e-06 deg
node 267.9685630129266 6.0414e-05 deg
peri 291.1117705426556 6.1744e-05 deg
M 250.1499499854344 1.4047e-05 deg
tp 2459578.188884765084
(2021-Dec-29.68888476)		 4.9089e-05 TDB
period 1237.760005547578
3.39		 5.7454e-06
1.573e-08		 d
yr
n .2908479821504154 1.3501e-09 deg/d
Q 2.582851017090058 7.9927e-09 au
   Orbit Determination Parameters
   # obs. used (total)      1197  
   data-arc span      14613 days (40.01 yr)  
   first obs. used      1981-02-09  
   last obs. used      2021-02-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53352  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:35:35  

Additional Information
 Earth MOID = .929536 au 
 Jupiter MOID = 2.38953 au 
 T_jup = 3.607 
[ 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 15.6   n/a MPO395204  

20980 (1981 ED16)          Discovered 1981-Mar-01 by Bus, S. J. at Siding Spring
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1981 ED16 = 1998 FH119 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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