Margaret is a moon of Uranus, part of the Solar System in the universe. Uranus is a planet associated with the Sun, our star, and this space encyclopedia describes the moon’s identity and place in its planetary system.

Margaret — A natural satellite of Uranus. Its physical properties and orbital motion are shown from the available catalogue and ephemeris data.

No object-specific chemical/elemental dataset has been verified and imported for this record. This does not mean none is publicly available. Appearance may be imagined; chemistry is not.

Discovery and designation
Margaret was discovered in 2003. JPL credits S.S. Sheppard, D.C. Jewitt. Its provisional designation is S/2003 U3. The name and discovery entry identify this particular satellite of Uranus; similarly named asteroids are separate objects.

Margaret was discovered on Aug. 29, 2003 by Scott S. Sheppard and David C. Jewitt with the Subaru 8.2-m reflector at the Mauna Kea Observatory on the island of Hawaii.

Margaret is considered an irregular moon of Uranus because of the eccentricity and inclination of its orbit, but it is the only such moon that travels in a prograde direction―that is, in the same direction as the regular moons and the planet's rotation about its axis. Only about 20 km in diameter and very dark, it is likely an object that was captured by Uranus' gravity.

Originally called S/2003 U3, Margaret was named after a woman who serves Hero in William Shakespeare's play, "Much Ado About Nothing."