Search results
Results from the WOW.Com Content Network
Semi-synchronous orbit: An orbit with an orbital period equal to half of the average rotational period of the body being orbited and in the same direction of rotation as that body. For Earth this means a period of just under 12 hours at an altitude of approximately 20,200 km (12,544.2 miles) if the orbit is circular. [16]
It is also designated Uranus VI. [10] Other than its orbit, [4] size of 50 × 36 km, [5] and geometric albedo of 0.06, [7] virtually nothing is known about it. In the Voyager 2 images, Cordelia appears as an elongated object with its major axis pointing towards Uranus. The ratio of axes of Cordelia's prolate spheroid is 0.7 ± 0.2. [5]
[a] The largest of the satellites, Titania, has a radius of 788.9 km, [21] or less than half that of the Moon, but slightly more than that of Rhea, the second-largest moon of Saturn, making Titania the eighth-largest moon in the Solar System. Uranus is about 10,000 times more massive than its moons. [b]
Its orbital period is 34 hours and, like that of the Moon, is synchronous with its rotation period, which means it always shows the same face to Uranus, a condition known as tidal locking. Miranda's orbital inclination (4.34°) is unusually high for a body so close to its planet – roughly ten times that of the other major Uranian satellites ...
Oberon orbits Uranus at a distance of about 584,000 km, being the farthest from the planet among its five major moons. [e] Oberon's orbit has a small orbital eccentricity and inclination relative to the equator of Uranus. [4] Its orbital period is around 13.5 days, coincident with its rotational period.
Puck's orbit is located between the rings of Uranus and Miranda. Little is known about Puck aside from its orbit, [4] radius of about 81 km, [5] and geometric albedo in visible light of approximately 0.11. [8]
Margaret is the only known prograde irregular satellite of the moons of Uranus. It was discovered by Scott S. Sheppard, et al. in 2003 and given the provisional designation S/2003 U 3. [8] Confirmed as Uranus XXIII, it was named after the servant of Hero in William Shakespeare's play Much Ado About Nothing. [1]
[5] Little is known about Portia beyond its dimensions of about 156 × 126 km, [3] orbit, [2] and geometric albedo of about 0.08. [5] In Voyager 2 imagery, Portia appears as an elongated object whose major axis points towards Uranus. The ratio of axes of the Portia's prolate spheroid is 0.8 ± 0.1. [3] Its surface is grey in color. [3]