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24631 (1981 EB21)
Classification: Main-belt Asteroid          SPK-ID: 2024631
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1619476299180757 3.405e-08  
a 3.104879065504765 1.7642e-08 au
q 2.602051259664019 1.0233e-07 au
i 2.220511318526922 3.8109e-06 deg
node 298.0240480172232 0.00011679 deg
peri 162.5160923089136 0.00011768 deg
M 200.5741815501375 1.6012e-05 deg
tp 2460281.455871469720
(2023-Dec-02.95587147)
9.31e-05 TDB
period 1998.321958304954
5.47
1.7032e-05
4.663e-08
d
yr
n .1801511505710344 1.5354e-09 deg/d
Q 3.607706871345511 2.0499e-08 au
  Orbit Determination Parameters
   # obs. used (total)      921  
   data-arc span      15200 days (41.62 yr)  
   first obs. used      1979-11-22  
   last obs. used      2021-07-04  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .5242  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 10:17:48  

Additional Information
 Earth MOID = 1.61925 au 
 Jupiter MOID = 1.55255 au 
 T_jup = 3.199 
[ 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 14.68   n/a E2021B10  

24631 (1981 EB21)          Discovered 1981-Mar-02 by Bus, S. J. at Siding Spring
Reference: 20010606/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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