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21170 (1994 AL10)
Classification: Main-belt Asteroid          SPK-ID: 2021170
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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .142532298323592 3.6016e-08  
a 2.258999289114129 6.508e-09 au
q 1.937018928525331 8.2484e-08 au
i 5.588413436398554 3.8339e-06 deg
node 97.31174630630929 3.8772e-05 deg
peri 101.5628967488771 4.1315e-05 deg
M 331.8341030325543 1.5872e-05 deg
tp 2459493.527234632816
(2021-Oct-06.02723463)
5.4872e-05 TDB
period 1240.145290177902
3.40
5.3592e-06
1.467e-08
d
yr
n .2902885676793218 1.2545e-09 deg/d
Q 2.580979649702926 7.4356e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1201  
   data-arc span      9986 days (27.34 yr)  
   first obs. used      1994-01-08  
   last obs. used      2021-05-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54878  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 14:58:10  

Additional Information
 Earth MOID = .944469 au 
 Jupiter MOID = 2.38698 au 
 T_jup = 3.602 
[ 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 15.39   n/a MPCxxxxx  

21170 (1994 AL10)          Discovered 1994-Jan-08 by Spacewatch at Kitt Peak
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1994 AL10 = 1999 TA240 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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