UPSA Object Registry
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Moon

Natural satellite JPL Horizons
Mean radius
1,737.5 km
Mass
7.349 1e22 kg
Density
3.3437 g/cm^3
Geometric albedo
0.12

Also known as

2 identifiers

Horizons 301Luna

Recorded parameters

25 quantities with a single published value
ParameterValueUnitUncertainty As publishedSourceReference
Mass 7.349 1e22 kg Mass, x10^22 kg JPL Horizons JPL Horizons on-line ephemeris system
Mean radius 1,737.53 km Vol. mean radius, km JPL Horizons JPL Horizons on-line ephemeris system
Density 3.3437 g/cm^3 Density, g/cm^3 JPL Horizons JPL Horizons on-line ephemeris system
Geometric albedo 0.12 Geometric Albedo JPL Horizons JPL Horizons on-line ephemeris system
GM 4,902.8 km^3/s^2 GM, km^3/s^2 JPL Horizons JPL Horizons on-line ephemeris system
Obliquity to orbit 6.67 deg Obliquity to orbit JPL Horizons JPL Horizons on-line ephemeris system
Mean solar day 29.5306 day Mean solar day JPL Horizons JPL Horizons on-line ephemeris system
Apsidal period 3,231.5 d Apsidal period JPL Horizons JPL Horizons on-line ephemeris system
Cm 3 nearside crust thick 58 cm^3 Nearside crust. thick. JPL Horizons JPL Horizons on-line ephemeris system
Earth moon mass ratio 81.30057 Earth/Moon mass ratio JPL Horizons JPL Horizons on-line ephemeris system
Eccentricity 0.0549 Eccentricity JPL Horizons JPL Horizons on-line ephemeris system
Farside crust thick ~80 - 90 km Farside crust. thick. JPL Horizons JPL Horizons on-line ephemeris system
Heat flow apollo 15 3.1 Heat flow, Apollo 15 JPL Horizons JPL Horizons on-line ephemeris system
Heat flow apollo 17 2.2 Heat flow, Apollo 17 JPL Horizons JPL Horizons on-line ephemeris system
Inclination 5.145 deg Inclination JPL Horizons JPL Horizons on-line ephemeris system
Mean angular diameter 31 '05 Mean angular diameter JPL Horizons JPL Horizons on-line ephemeris system
Mean motion rad s 2.6617 rad/s Mean motion, rad/s JPL Horizons JPL Horizons on-line ephemeris system
Nodal period 6,798.38 d Nodal period JPL Horizons JPL Horizons on-line ephemeris system
Orbit period 27.32158 d Orbit period JPL Horizons JPL Horizons on-line ephemeris system
Radius gravity km 1,738 km Radius (gravity), km JPL Horizons JPL Horizons on-line ephemeris system
Radius iau km 1,737.4 km Radius (IAU), km JPL Horizons JPL Horizons on-line ephemeris system
Semi major axis a 384,400 a Semi-major axis, a JPL Horizons JPL Horizons on-line ephemeris system
Sid rot rate rad s 2.66170e-06 rad/s Sid. rot. rate, rad/s JPL Horizons JPL Horizons on-line ephemeris system
Surface accel m s 2 1.62 m/s^2 Surface accel., m/s^2 JPL Horizons JPL Horizons on-line ephemeris system
Surface emissivity 0.92 Surface emissivity JPL Horizons JPL Horizons on-line ephemeris system

Provenance

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

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