Thalassa
Thalassa (Natural satellite). See its size, orbit and live position on a 3D map of the Solar System. Thalassa, also known as Neptune IV, is the second-innermost satellite of Neptune.
Thalassa, also known as Neptune IV, is the second-innermost satellite of Neptune. Thalassa was named after sea goddess Thalassa, a daughter of Aether and Hemera from Greek mythology. "Thalassa" is also the Greek word for "sea".
- Type: Natural satellite
- Orbiting: Neptune
- Diameter: 80 km
- Orbital period: 7.5 hours