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Titania

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MOON

Titania

The largest moon of Uranus — crossed by enormous canyons and possibly hosting a subsurface ocean.

Orbits Uranus
  • Largest Uranian moon; eighth-largest moon in the Solar System.
  • Messina Chasmata u2014 1,500 km canyon system.
  • 2022 JWST + ground-based spectroscopy suggests possible subsurface ocean.

Physical Properties

788 km
3.4e21 kg
1.711 g/cm³
0.367 m/s²
208.94 h
0.35
70 K

Orbit

Uranus
436,300 km
0.0011
0.34°
8.706 d

Sources & Further Reading

Numerical values (radius, mass, orbital elements, temperatures) are drawn from NASA NSSDC Planetary Fact Sheets, JPL Horizons, and the JPL Small-Body Database. Last refreshed: 2026-04-18 18:19:25.

Titania is the largest moon of Uranus, about half the diameter of Earth’s Moon, and the eighth-largest moon in the Solar System. Its surface shows a mixture of impact craters and tectonic features, including the enormous Messina Chasmata canyon system stretching 1,500 km. Spectroscopic observations from JWST and ground-based telescopes in 2022-2023 detected water ice, CO₂ ice and possibly ammonia compounds consistent with a subsurface ocean interacting with the ice shell.