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20251 (1998 EA12)
Classification: Main-belt Asteroid          SPK-ID: 2020251
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 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1602873735757684 3.1897e-08  
a 2.368530452299066 6.5484e-09 au
q 1.988884926865822 7.6274e-08 au
i 3.482511240668602 2.9706e-06 deg
node 83.37223895278788 5.8492e-05 deg
peri 132.7014233193514 5.9429e-05 deg
M 54.83873811781012 9.7953e-06 deg
tp 2458997.684175139314
(2020-May-28.18417514)
3.6304e-05 TDB
period 1331.425547994769
3.65
5.5216e-06
1.512e-08
d
yr
n .2703868800941878 1.1213e-09 deg/d
Q 2.74817597773231 7.5981e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1644  
   data-arc span      15203 days (41.62 yr)  
   first obs. used      1978-11-29  
   last obs. used      2020-07-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49916  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:16:07  

Additional Information
 Earth MOID = .982628 au 
 Jupiter MOID = 2.22061 au 
 T_jup = 3.526 
[ 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 15.14   n/a E2021B10  

20251 (1998 EA12)          Discovered 1998-Mar-01 by Elst, E. W. at La Silla
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 EA12 = 1978 WG5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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