URANUS SYSTEM / SATELLITE DOSSIER

Miranda

Miranda is a small moon of Uranus with towering scarps and a patchwork of icy terrain.

Interior ↗

03
Miranda interiorMiranda's internal structure is unresolved.Unresolved

Moon system ↗

04
Uranus moon orbitsSelected moons, ordered outward. Orbit sizes and positions are schematic; relative periods are preserved.URANUSCORDELIAOPHELIABIANCACRESSIDADESDEMONAJULIETPORTIAROSALINDCUPIDBELINDAPERDITAPUCKMABMIRANDAARIELUMBRIELTITANIAOBERON
MIRANDA

Instrument detail

THE SKY FROM MIRANDA

Uranus, in perspective.

SHARED ANGULAR SCALE
Uranus compared with Luna in Earth's skyAt semimajor-axis distance, Uranus spans approximately 22.75 degrees, 43.92 times the apparent diameter of Luna at its mean distance from Earth. Both disks share one angular scale.URANUSOUR MOON≈ 0.52°
Idealized size study · full disks · decorative lighting · rings excluded
ANGULAR DIAMETER
22.75°
OUR MOON'S APPARENT DIAMETER
43.92 ×
CENTER-TO-CENTER DISTANCE
129,846 km

The viewpoint is on Miranda’s nominal spherical surface, directly facing Uranus. The reference is Luna seen from Earth’s center at its mean distance. The reference distance is the orbit’s semimajor axis. Rounded body diameters and orbital elements set the disk sizes; terrain, phases, rings and the actual sky position are not modeled.

Explore Uranus ↗
Miranda orbitElliptical orbit viewed along the orbital axis, relative to Uranus. Motion is accelerated, not a live position. Distances are center to center.URANUSMIRANDA≈ 129,846 km
ONE ORBIT1.41 Earth days around Uranus
Closest to Uranus
129,716 km
Farthest from Uranus
129,976 km

Miranda circles Uranus. Distances are measured between the centers of the two bodies.

Miranda rotation compared with EarthThe markers follow equal elapsed time on both worlds. Equal elapsed time and sidereal rotation rates. Polar schematic: sizes, axial tilt and seasons are not shown. Illumination uses a circular mean orbit, not a live sky prediction.SAME ELAPSED TIME · POLAR SCHEMATICMIRANDA33.8 hoursSIDEREAL ROTATIONRetrograde spinEARTH23.9 hoursSIDEREAL ROTATION≈ 24 h · solar day
Marked longitude · equal time on both worlds
ONE SIDEREAL ROTATION33.8 hours

A reverse spin

Miranda turns once in each orbit, so roughly the same hemisphere faces Uranus. The spin period is 1.41 Earth days; this is not the interval between sunrises.

0 Earth hoursShared clock

Spin comparison only; no solar day is inferred. Sizes and starting longitudes are schematic, not live positions.

Satellite atlasMoons
Uranus moon orbitsSelected moons, ordered outward. Orbit sizes and positions are schematic; relative periods are preserved.URANUSCORDELIAOPHELIABIANCACRESSIDADESDEMONAJULIETPORTIAROSALINDCUPIDBELINDAPERDITAPUCKMABMIRANDAARIELUMBRIELTITANIAOBERON
FEATURED MOONS18
  1. 01Cordelia ↗0.3347 days
  2. 02Ophelia ↗0.3764 days
  3. 03Bianca ↗0.4347 days
  4. 04Cressida ↗0.4639 days
  5. 05Desdemona ↗0.4736 days
  6. 06Juliet ↗0.4931 days
  7. 07Portia ↗0.5132 days
  8. 08Rosalind ↗0.5583 days
  9. 09Cupid ↗0.6125 days
  10. 10Belinda ↗0.6236 days
  11. 11Perdita ↗0.6382 days
  12. 12Puck ↗0.761833 days
  13. 13Mab ↗0.9229 days
  14. 14Miranda1.41 days
  15. 15Ariel ↗2.5204 days
  16. 16Umbriel ↗4.1442 days
  17. 17Titania ↗8.7059 days
  18. 18Oberon ↗13.4632 days

Faint rings and a family of moons surround Uranus. Many of those moons take their names from characters in Shakespeare and Alexander Pope. One journey around the Sun lasts about 84 Earth years.

Miranda gravityEqual launches at 2 m/s; shared metre scale; air resistance ignored.0 m10 m20 m30 mEARTH9.80 m/s²MIRANDA0.08 m/s²
MIRANDA / EARTH GRAVITY0.0079 ×

Same push, different gravity

Both balls launch at 2 m/s, using the same height and time scales. Weaker gravity gives a higher jump and a longer time in the air. Air resistance is ignored. This idealized comparison uses constant spherical gravity GM/r²; local terrain, tides and rotation are excluded. Playback runs 5× faster for both balls.

Earth · height / airtime
0.20 m / 0.41 s
Miranda · height / airtime
25.86 m / 51.72 s
Miranda interiorMiranda's internal structure is unresolved.Unresolved

Beyond the surface

Voyager revealed a complex icy surface, but the arrangement of rock and ice inside Miranda remains poorly constrained.

    Artist’s impression of Miranda

    A puzzle written in relief.

    Miranda combines cratered ground with sharply bounded regions of ridges and valleys. Those contrasting terrains make a small globe look unexpectedly complicated. Its landscape is a reminder that size alone does not determine geological variety.

    Cliffs beyond familiar scale.

    Major faults have created striking escarpments. Seen from an imagined low viewpoint, even modest foreground rubble would give way to an imposing horizon. Ground-level detail remains an interpretation of much more distant observations.

    The pieces are still being read.

    Several processes have been proposed to explain Miranda’s unusual regions. The images establish that the terrain is varied, but they do not provide a complete history. A dramatic landscape can preserve an unresolved story.

    A brief encounter, lasting questions.

    Voyager 2 supplied the close views that shape our picture of Miranda. They reveal an icy, rocky world with far more structure than a simple cratered ball. Much of its interior and geological sequence remains uncertain.

    DIAMETER / EARTH0.04×
    EARTHMIRANDA
    EARTH
    12,742 km
    MIRANDA
    471.6 km
    Mean diameters · circles share one scale
    ATMOSPHERE
    No substantial atmosphereNo substantial atmosphere

    Miranda has no known thick atmosphere. A detailed gas mixture or surface-weather chart would imply knowledge we do not have.

    SURFACE TEMPERATURE
    Deeply cold · variable illumination
    SURFACE PRESSURE
    Effectively airless
    HABITABILITYUncertain

    No life is known. The exposed frozen terrain offers no established liquid-water habitat; interior conditions remain uncertain.

    UNPROTECTED HUMANSNot survivable

    There is no breathable air. Pressure protection, oxygen and thermal protection are essential; an apparently solid landscape is not a safe human environment.

    Planet and landscape images are artistic interpretations.

    • NASA ↗
      • Classification and orbital data
      • Rotation and internal structure constraints
      • Natural conditions and human survival
      • Earthin
      • Scarps
      • History
      • Exploration
    • NASA ↗
      • Parent-body diameter for the angular sky comparison
    • NASA / JPL ↗
      • GM and mean radius; spherical gravity estimate GM/r²
    • NASA / JPL ↗
      • Mean orbital dimensions; distances from parent center
    • NASA ↗
      • Size, physical data and atmospheric constraints
    An imagined Miranda landscape informed by fractured and faulted terrain. Voyager observations do not resolve this ground-level detail.

    A world of scarps

    An imagined Miranda landscape informed by fractured and faulted terrain. Voyager observations do not resolve this ground-level detail.

    An imagined ridged plateau and escarpment. The scene evokes Miranda’s varied geology without claiming to reconstruct a specific corona.

    Across the plateau

    An imagined ridged plateau and escarpment. The scene evokes Miranda’s varied geology without claiming to reconstruct a specific corona.

    Repeating pale icy fault ridges and dark narrow troughs. An artistic reconstruction of Miranda; local detail, lighting and viewpoint are imagined.

    Ridges from overhead

    Repeating pale icy fault ridges and dark narrow troughs. An artistic reconstruction of Miranda; local detail, lighting and viewpoint are imagined.