Portia 
 
Portia was named after a rich heiress in Shakespeare's play
Merchant of Venice . It is the seventh known satellite of
Uranus and was discovered by Voyager 2 .
Portia Statistics 
  Discovered by Voyager 2 
  Date of discovery 1986 
 
  Mass (kg) ? 
  Equatorial radius (km) 55 
  Equatorial radius (Earth = 1) 8.6234e-03 
  Mean density (gm/cm^3) ? 
 
  Mean distance from Uranus (km) 66,100 
  Rotational period (days) ? 
  Orbital period (days) 0.513196 
  Mean orbital velocity (km/sec) 9.37 
 
  Orbital eccentricity 0.000 
  Orbital inclination (degrees) 0.09 
 
  Visual geometric albedo 0.07 
  Magnitude (Vo) 21.0 
 
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