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186222 (2001 WA81)
Classification: Main-belt Asteroid          SPK-ID: 2186222
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07152961150218679 5.9806e-08  
a 2.676448052124452 1.7147e-08 au
q 2.485002762750206 1.6098e-07 au
i 7.064956545095123 5.4247e-06 deg
node 72.15857216202176 4.6904e-05 deg
peri 291.2083102901162 5.7523e-05 deg
M 180.9477659644056 3.4624e-05 deg
tp 2459995.951853031704
(2023-Feb-20.45185303)
0.00015624 TDB
period 1599.324736906027
4.38
1.5369e-05
4.208e-08
d
yr
n .2250949989658998 2.1632e-09 deg/d
Q 2.867893341498699 1.8374e-08 au
  Orbit Determination Parameters
   # obs. used (total)      271  
   data-arc span      8078 days (22.12 yr)  
   first obs. used      1999-03-20  
   last obs. used      2021-05-01  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .56809  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 10:13:57  

Additional Information
 Earth MOID = 1.49235 au 
 Jupiter MOID = 2.46337 au 
 T_jup = 3.364 
[ 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 16.8   n/a MPO418005  

186222 (2001 WA81)          Discovered 2001-Nov-20 by LINEAR at Socorro
Reference: 20080520/Numbers.arcLast Updated: 2008-05-22

Alternate Designations
 2001 WA81 = 2005 SV282 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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