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146946 (2002 EC21)
Classification: Inner Main-belt Asteroid          SPK-ID: 2146946
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09197653015550147 4.1286e-08  
a 1.905795447100586 6.2949e-09 au
q 1.730506994690121 7.9293e-08 au
i 19.86021058202878 5.8218e-06 deg
node 359.5902069239799 1.3174e-05 deg
peri 84.2101052268348 4.9352e-05 deg
M 45.98373866029092 4.1411e-05 deg
tp 2458877.751941403578
(2020-Jan-29.25194140)
0.00011078 TDB
period 960.9766926774793
2.63
4.7612e-06
1.304e-08
d
yr
n .3746188671828926 1.8561e-09 deg/d
Q 2.08108389951105 6.8739e-09 au
  Orbit Determination Parameters
   # obs. used (total)      528  
   data-arc span      7740 days (21.19 yr)  
   first obs. used      1998-11-19  
   last obs. used      2020-01-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57136  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 08:40:35  

Additional Information
 Earth MOID = .830245 au 
 Jupiter MOID = 3.0679 au 
 T_jup = 3.864 
[ 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 16.7   n/a MPO220373  

146946 (2002 EC21)          Discovered 2002-Mar-10 by NEAT at Haleakala
Reference: 20070106/Numbers.arcLast Updated: 2007-01-09
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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