Saturn · natural satellite

Hyperion

Mean diameter: 270 km
Mean orbital distance: 1,481,500 km from centre
Orbital period: 21.277 Earth days

Compared with our Moon

Hyperion · 270 km

Moon · 3,474.8 km

One diameter scale. Circle shapes compare volume-equivalent diameters; irregular moons are not spheres.

Orbit & discovery

Surface gravity: 0.02 m/s²
Discovery: 1848
Discoverer / team: W.C Bond, G.P. Bond, W. Lassell
Provisional designation: —
JPL satellite ID: 607
Orbital eccentricity: 0.105
Inclination: 0.6 degrees

Inclination reference: Laplace. Mean-element epoch: 2000-01-01.5 TDB · SAT441.

Diameters use volume-equivalent mean radii, including for irregular bodies. Mean orbital elements describe an orbit; they are not live positions. Missing physical measurements remain unavailable.

Physical measurements & uncertainties

Mean radius · km: 135.00 ±4.00 [1]
GM · km³/s²: 0.37049 ±0.00005 [SAT441]
Density · g/cm³: 0.5386 ±0.0479 [*]

Missions in the Saturn system · 5 records

5 launches · 0 linked events

These records cover the planetary system. A system mission did not necessarily visit this moon. Dedicated targets are marked separately; programme events include the journey and briefings. Launch outcomes do not establish arrival, landing success or present spacecraft operation.

Dedicated targets only

PLANETARY SYSTEM · UPCOMING