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441371 (2008 EH21)
Classification: Main-belt Asteroid          SPK-ID: 2441371
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1560457234512603 5.0676e-08  
a 2.248504290109183 1.6888e-08 au
q 1.897634811475834 1.179e-07 au
i 1.636467461857366 6.4049e-06 deg
node 278.4573738655004 0.00020639 deg
peri 307.8329183036669 0.00020805 deg
M 252.9111599139735 2.6887e-05 deg
tp 2459566.836946798284
(2021-Dec-18.33694680)
9.4661e-05 TDB
period 1231.513019857528
3.37
1.3875e-05
3.799e-08
d
yr
n .2923233406347973 3.2934e-09 deg/d
Q 2.599373768742533 1.9524e-08 au
  Orbit Determination Parameters
   # obs. used (total)      123  
   data-arc span      5177 days (14.17 yr)  
   first obs. used      2006-11-16  
   last obs. used      2021-01-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55004  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 14:40:35  

Additional Information
 Earth MOID = .887379 au 
 Jupiter MOID = 2.3856 au 
 T_jup = 3.612 
[ 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 18.12   n/a MPCxxxxx  

441371 (2008 EH21)          Discovered 2008-Mar-02 by Spacewatch at Kitt Peak
Reference: Last Updated: 2015-09-02
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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