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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 ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1859364469882057 3.9222e-08  
a 2.635680904768355 8.7737e-09 au
q 2.145611761941068 1.0537e-07 au
i 10.5818124093381 4.2005e-06 deg
node 209.4525154615354 1.6365e-05 deg
peri 164.8533873117847 1.932e-05 deg
M 8.256252647182928 8.354e-06 deg
tp 2459164.655861597986
(2020-Nov-11.15586160)
3.6274e-05 TDB
period 1562.923323225559
4.28
7.804e-06
2.137e-08
d
yr
n .230337595357546 1.1501e-09 deg/d
Q 3.125750047595642 1.0405e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1287  
   data-arc span      11103 days (30.40 yr)  
   first obs. used      1990-10-09  
   last obs. used      2021-03-03  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45963  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 12:26:04  

Additional Information
 Earth MOID = 1.1477 au 
 Jupiter MOID = 2.34858 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 14.95   n/a E2021B10  

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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