Edu

Known as the "small, slow moon", Edu is a secondary satellite of Ethru. It is a triaxial ellipsoid object (136 km × 123 km × 106 km, 121 km average diameter) that orbits just a little past the geosynchronous zone, making it appear almost stationary in the sky. However, it does progress and returns to its apparent position roughly every 24 days. Incidentally, this is about the same amount of time that its sister moon, Thia, takes to orbit the planet.

Type

Planetoid / Moon

Location under

Ethru

Satellite Information

• Distance: 43,330 km
• Mass: 3.671×10¹⁸ kg = 0.00005 LMs
• Surface Gravity (avg.): 0.007 g's
• Eq. Radius (avg.): 0.035 LR = 0.009 ER
  Dimensions:
  • Length: 136 km (84.5 mi)
  • Width: 123 km (76.4 mi)
  • Thick: 106 km (65.8 mi)
• Density: 3,958 kg/m³
• Orbital Eccentricity: 0.0001
• albedo: 0.87
• Orbital Period: 1.042 E.days = 25.0 hrs
• Apparent Diameter: 0.163° × 0.140°
  (overhead, 31.4% × 27.1% of the Moon)