UPSA Object Registry
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Dione

Natural satellite JPL Horizons
Mean radius
562.5 km
Mass
109.57 1e19 kg
Density
1.469 g/cm^3
Orbital period
2.7369 d
Geometric albedo
0.6

Also known as

2 identifiers

Horizons 604SIV

Recorded parameters

9 quantities with a single published value
ParameterValueUnitUncertainty As publishedSourceReference
Mass 109.572 1e19 kg Mass (10^19 kg) JPL Horizons JPL Horizons on-line ephemeris system
Mean radius 562.5 km Mean Radius (km) JPL Horizons JPL Horizons on-line ephemeris system
Density 1.469 g/cm^3 Density (g/cm^3) JPL Horizons JPL Horizons on-line ephemeris system
Orbital period 2.736915 d Orbital period JPL Horizons JPL Horizons on-line ephemeris system
Geometric albedo 0.6 Geometric Albedo JPL Horizons JPL Horizons on-line ephemeris system
Eccentricity e 0.0022 e Eccentricity, e JPL Horizons JPL Horizons on-line ephemeris system
Inclination i deg 0.028 deg Inclination, i (deg) JPL Horizons JPL Horizons on-line ephemeris system
Rotational period Synchronous Rotational period JPL Horizons JPL Horizons on-line ephemeris system
Semi major axis a km 377.42 km Semi-major axis, a (km) JPL Horizons JPL Horizons on-line ephemeris system

Provenance

where this card came from
ArchiveRead at (UTC)Record
JPL Horizons 2026-08-14 17:09 open at source

Machine-readable: /api/v1/object/dione · Registry entry updated 2026-08-14.