Metis
Metis is an irregularly shaped inner moon of Jupiter, orbiting close to the planet's cloud tops.
Also known as: Jupiter XVI, Metis moon
How big is it?
43 km across
Mean-equivalent diameter · approximate
Typical recorded range: 40 km to 46 km.
A little perspective
About 1.91 times the representative mean diameter of Phobos.
Phobos: Phobos is the larger and innermost moon of Mars, notable for its irregular shape and heavily cratered surface.
Measurements, assumptions & sources +
Metis
Jupiter moon Metis is an irregular inner satellite approximately 43 km in mean-equivalent diameter. Its low-detail illustrated shape remains schematic because the surface is poorly resolved.
NASA JPL — Planetary satellite physical parameters
The marked mean-equivalent diameter is calibrated. Unmeasured illustration details are representative.
Phobos
Mars’s larger moon is irregular, about 27 × 22 × 18 km. The 22.533 km comparison diameter is representative rather than a spherical edge.
The marked representative mean diameter is calibrated. Unmeasured illustration details are representative.
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Why this measurement?
Why we use 43 km
For comparison, this page uses mean-equivalent diameter. This is labelled approximate; the central value is useful for comparison, while real values or measurement solutions can vary. The recorded range is 40 km to 46 km.
Jupiter moon Metis is an irregular inner satellite approximately 43 km in mean-equivalent diameter. Its low-detail illustrated shape remains schematic because the surface is poorly resolved.
The marked horizontal span follows the named feature; transparent margins and unmeasured details do not alter it. How calibrated comparisons work →
Recorded properties
Metis dimensions and measurements
| Property | Selected value | Recorded range | Basis |
|---|---|---|---|
| 43 km | 40 km to 46 km | approximate |
Around this scale
Go smaller. Go bigger.
These links use compatible length records, ordered around the selected value.
Nearest lower value · PlacesOnyx River32 kmThe Onyx River is a seasonal meltwater stream in Antarctica’s McMurdo Dry Valleys, regarded as the continent’s longest river.
Around the same scale · SpacePhobos22.53 kmPhobos is the larger and innermost moon of Mars, notable for its irregular shape and heavily cratered surface.
Nearest higher value · PlacesYellowstone Caldera70 kmThe Yellowstone Caldera is a large volcanic collapse structure within Yellowstone National Park in the United States.Sources and method
Want to check the number?
The source records and measurement method remain available for inspection.
- NASA JPL — Planetary satellite physical parametersPublished mean radii and gravitational parameters GM. Spherical areas, volumes, masses and local gravity are explicitly derived.
There’s always another scale
Follow your curiosity.
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