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216720 (2005 EW198)
Classification: Main-belt Asteroid          SPK-ID: 2216720
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 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .167294800271077 4.1433e-08  
a 2.423154325799912 1.2598e-08 au
q 2.01777320683922 1.037e-07 au
i 1.96252665984631 5.1585e-06 deg
node 211.3967408672129 0.00015804 deg
peri 30.18050287346869 0.0001591 deg
M 77.39834924889418 1.9324e-05 deg
tp 2459100.290327622866
(2020-Sep-07.79032762)
7.3157e-05 TDB
period 1377.748790388985
3.77
1.0744e-05
2.942e-08
d
yr
n .2612958200444944 2.0377e-09 deg/d
Q 2.828535444760605 1.4705e-08 au
  Orbit Determination Parameters
   # obs. used (total)      218  
   data-arc span      8498 days (23.27 yr)  
   first obs. used      1997-02-15  
   last obs. used      2020-05-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .56308  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 23:56:01  

Additional Information
 Earth MOID = 1.00571 au 
 Jupiter MOID = 2.181 au 
 T_jup = 3.492 
[ 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 17.43   n/a E2021B55  

216720 (2005 EW198)          Discovered 2005-Mar-11 by Mt. Lemmon Survey at Mount Lemmon
Reference: 20090707/Numbers.arcLast Updated: 2009-07-09
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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