Voyager 2 image of Portia.

PORTIA - MOON OF URANUS

Portia is a female character in Shakespeare's play "The Merchant of Venice". It was discovered in 1986 in Voyager 2 images.

Orbit

Portia orbits Uranus at a distance of 66,090 kilometres. The orbit is very nearly circular, and lies in the plane of Uranus' equator.

Physical properties

Portia is about 108 kilometres in diameter, but its mass and density are unknown.

Interior

The interior of Portia is unknown.

Magnetic field

No magnetic field has been detected.

Atmosphere

No atmosphere has been detected.

Surface

Portia's surface albedo of 0.07 makes it a very dark moon. There are no images of Portia's surface.