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21236 (1995 WE3)
Classification: Main-belt Asteroid          SPK-ID: 2021236
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 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09313742388493981 3.1211e-08  
a 2.540639678568651 8.3433e-09 au
q 2.304011043886905 8.0651e-08 au
i 4.39728591714877 2.9596e-06 deg
node 65.53704158774286 4.8644e-05 deg
peri 133.1276170918678 5.2101e-05 deg
M 347.1068111230942 1.9345e-05 deg
tp 2459449.474990265691
(2021-Aug-22.97499027)
7.9502e-05 TDB
period 1479.152805231042
4.05
7.2861e-06
1.995e-08
d
yr
n .2433825624552484 1.1989e-09 deg/d
Q 2.777268313250397 9.1203e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1608  
   data-arc span      10300 days (28.20 yr)  
   first obs. used      1993-04-18  
   last obs. used      2021-06-30  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48643  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 14:58:56  

Additional Information
 Earth MOID = 1.30458 au 
 Jupiter MOID = 2.17992 au 
 T_jup = 3.435 
[ 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 14.95   n/a MPO636383  
diameter diameter 2.871 km 0.686 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.178   0.099 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21236 (1995 WE3)          Discovered 1995-Nov-20 by Farra d'Isonzo at Farra d'Isonzo
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1995 WE3 = 1999 VE68 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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