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JPL Small-Body Database Browser
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66944 (1999 WQ20)
Classification: Main-belt Asteroid          SPK-ID: 2066944
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1861185697333797 4.4571e-08  
a 2.636401633188052 1.3629e-08 au
q 2.145718331976345 1.1594e-07 au
i 10.58084939250905 5.6171e-06 deg
node 209.4584316362512 2.4414e-05 deg
peri 164.7917697996783 2.8444e-05 deg
M 322.243051360653 1.5716e-05 deg
tp 2459164.487284088504
(2020-Nov-10.98728409)
6.8954e-05 TDB
period 1563.564440436264
4.28
1.2124e-05
3.319e-08
d
yr
n .2302431487246879 1.7854e-09 deg/d
Q 3.127084934399758 1.6166e-08 au
  Orbit Determination Parameters
   # obs. used (total)      700  
   data-arc span      10441 days (28.59 yr)  
   first obs. used      1990-10-09  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5037  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 05:29:15  

Additional Information
 Earth MOID = 1.14919 au 
 Jupiter MOID = 2.34622 au 
 T_jup = 3.349 
[ 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 14.9   n/a MPO296620  

66944 (1999 WQ20)          Discovered 1999-Nov-16 by CSS at Catalina
Reference: 20030910/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 WQ20 = 1990 TH6 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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