UPSA Object Registry

Registry · solar system

Phoebe

Natural satellite JPL Horizons

Mass: 0.8289 1e19 kg
Density: 1.633 g/cm^3
Orbital period: 550.31 d
Geometric albedo: 0.081

Also known as

2 identifiers

Horizons 609SIX

Recorded parameters

9 quantities with a single published value

Parameter	Value	Unit	Uncertainty	As published	Source	Reference
Mass	0.8289	1e19 kg		Mass (10^19 kg)	JPL Horizons	JPL Horizons on-line ephemeris system
Density	1.633	g/cm^3		Density (g/cm^3)	JPL Horizons	JPL Horizons on-line ephemeris system
Orbital period	550.31	d		Orbital period	JPL Horizons	JPL Horizons on-line ephemeris system
Geometric albedo	0.081			Geometric Albedo	JPL Horizons	JPL Horizons on-line ephemeris system
Eccentricity e	0.1635	e		Eccentricity, e	JPL Horizons	JPL Horizons on-line ephemeris system
Inclination i deg	175.986	deg		Inclination, i (deg)	JPL Horizons	JPL Horizons on-line ephemeris system
Radius km	106.6	km		Radius (km)	JPL Horizons	JPL Horizons on-line ephemeris system
Rotational period	9	h		Rotational period	JPL Horizons	JPL Horizons on-line ephemeris system
Semi major axis a km	12,947.78	km		Semi-major axis, a (km)	JPL Horizons	JPL Horizons on-line ephemeris system

Provenance

where this card came from

Archive	Read at (UTC)	Record
JPL Horizons	2026-08-14 17:09	open at source

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