Uranus's Moon - Miranda

M
iranda was named after the daughter of the magician Prospero in Shakespeare's
play The Tempest. It was discovered by Gerard Kuiper in 1948. Miranda is not one of the larger satellites of Uranus;
however, it was the one that was approached the closest by Voyager
2. This was not the satellite scientists would have chosen to get close
to if they had a choice, but they had no choice. Voyager 2 had to fly close
to the planet in order to get the boost it needed to go to Neptune.
The resolution at which the larger satellites were photographed was around
2 to 3 kilometers (1.2 to 1.9 miles). On the other hand, details on the
order of a few hundred meters can be seen on Miranda. Fortunately, Miranda
turned out to be the most remarkable of all the satellites.
M
iranda's surface is unlike anything in the solar system with features
that are jumbled together in a haphazard fashion. Miranda consists of huge
fault canyons
as deep as 20 kilometers (12 miles), terraced layers and a mixture of old
and young surfaces. The younger regions might have been produced by incomplete
differentiation of the moon, a process in which upwelling of lighter material
surfaced in limited areas. Alternatively, scientists believe that Miranda
may have been shattered as many as five times during its evolution. After
each shattering the moon would have reassembled from the remains of its
former self with portions of the core exposed and portions of the surface
buried. Miranda's appearence can be explained by theories, but the real
reason is still unknown.
G
iven Miranda's small size and low temperature (-187° C or -335°
F), the degree and diversity of the tectonic activity on this moon has
surprised scientists. It is believed that an additional heat source such
as tidal
heating caused by the gravitational tug of Uranus must have been involved.
In addition, some means must have mobilized the flow of icy material at
low temperatures.
| PHYSICAL DATA FOR MIRANDA |
| Mass (kg) |
6.33e + 19
|
| Mass (Earth = 1) |
1.0592e - 05
|
| Radius (km) |
235.8
|
| Radius (Earth = 1) |
3.6971e - 02
|
| Mean Density (g/cm3) |
1.15
|
| Mean Distance from Jupiter (km) |
129,780
|
| Magnitude (V0) |
16.3
|
| ORBITAL DATA FOR MIRANDA |
| Rotational period (days) |
1.413479
|
| Orbital period (days) |
1.413479
|
| Mean orbital velocity (km/s) |
6.68
|
| Orbital eccentricity |
0.0027
|
| Orbital inclination (degrees) |
4.22
|
| Escape (km/s) |
0.189
|
| Albedo |
0.27
|
| Physical Data Key |
| |
| Mass |
Mass |
| Mass |
Mass compared to that of Earth. |
| Radius |
Radius |
| Radius |
Radius compared to that of Earth. |
| Mean Density |
Average Density. |
| Distance |
Distance to the planet's center. |
| Magnitude |
The brightness of a star or object. |
| |
| |
|
| Orbital Data Key |
| |
| Rotational Period |
Number of days to make one complete rotation. |
| Orbital Period |
Number of days to obital the planet. |
| Mean Orbital Velocity |
Average obital speed. |
| Orbital Eccentricity |
Eccentricity. |
| Orbital Inclination |
The tilt of the moon or planet. |
| Escape |
Escape Velocity. |
| Albedo |
Visual geometric albedo. |
|