Portia
Moon· orbits Uranus
Portia is a moon orbiting Uranus.
Open in 3D viewSee Portia in the live, interactive 3D map
Key facts
Radius
55 km
3% of our Moon's radius
Orbit around Uranus
12.3 hours
0.51 Earth days
Science
Physical
- Radius
- 55 km · 3% of our Moon's radius
- JPL Horizons OBJ_DATA (reported mean radius)
Orbit around Uranus
- Distance from Uranus
- 66,101 km
- From JPL orbital elements
- Orbital period
- 12.33 hours
- From JPL orbital elements
- Eccentricity
- 0.004
- From JPL orbital elements
- Inclination to Uranus's Laplace plane
- 2.70 °
- From JPL orbital elements · The Laplace plane is the one a moon's orbit precesses about: close in it is the planet's equatorial plane, the plane of the rings, and further out it tilts toward the planet's own orbit.
Radiation & temperature
- Insolation
- 0.00265 S⊕ · 1/378 of the sunlight Earth receives
- Computed from the distance to the Sun (inverse-square; Earth's sunlight = 1), before any atmosphere.
Discovery & history
- By
- Voyager Science Team
Portia was discovered in 1986 by Voyager Science Team. Uranus's moons are named after characters from the plays of Shakespeare and the poetry of Alexander Pope. Beyond its discovery and naming, little more about it has been individually recorded.
Images
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Images from open archives · credit shown per image