UPSA Object Registry
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Earth

Planet JPL Horizons
Mean radius
6,371 km
Mass
5.9722 1e24 kg
Density
5.51 g/cm^3
Orbital period
1 y
Geometric albedo
0.367

Also known as

2 identifiers

Horizons 399Geocenter

Recorded parameters

38 quantities with a single published value
ParameterValueUnitUncertainty As publishedSourceReference
Mass 5.97219 1e24 kg Mass x10^24 (kg) JPL Horizons JPL Horizons on-line ephemeris system
Mean radius 6,371.01 km Vol. Mean Radius (km) JPL Horizons JPL Horizons on-line ephemeris system
Equatorial radius 6,378.137 km Equ. radius, km JPL Horizons JPL Horizons on-line ephemeris system
Density 5.51 g/cm^3 Density, g/cm^3 JPL Horizons JPL Horizons on-line ephemeris system
Orbital period 1.000017 y Sidereal orb period JPL Horizons JPL Horizons on-line ephemeris system
Geometric albedo 0.367 Geometric albedo JPL Horizons JPL Horizons on-line ephemeris system
Escape velocity 11.186 km/s Escape velocity JPL Horizons JPL Horizons on-line ephemeris system
GM 398,600.4 km^3/s^2 GM, km^3/s^2 JPL Horizons JPL Horizons on-line ephemeris system
Obliquity to orbit 23.43929 deg Obliquity to orbit, deg JPL Horizons JPL Horizons on-line ephemeris system
Mean orbital speed 29.79 km/s Orbital speed, km/s JPL Horizons JPL Horizons on-line ephemeris system
Mean solar day 86,400 s Mean solar day 2000.0, s JPL Horizons JPL Horizons on-line ephemeris system
Atm pressure 1 bar Atm. pressure JPL Horizons JPL Horizons on-line ephemeris system
Atmos 5.1 Atmos JPL Horizons JPL Horizons on-line ephemeris system
Crust 2.6 crust JPL Horizons JPL Horizons on-line ephemeris system
Equatorial 9.780327 equatorial) JPL Horizons JPL Horizons on-line ephemeris system
Flattening 1 /298 Flattening JPL Horizons JPL Horizons on-line ephemeris system
Fluid core rad 3,480 km Fluid core rad JPL Horizons JPL Horizons on-line ephemeris system
Hill s sphere radius 234.9 Hill's sphere radius JPL Horizons JPL Horizons on-line ephemeris system
Iers 2010 0.001082625 IERS 2010) JPL Horizons JPL Horizons on-line ephemeris system
Inner core 9.675 x inner core JPL Horizons JPL Horizons on-line ephemeris system
Inner core rad 1,215 km Inner core rad JPL Horizons JPL Horizons on-line ephemeris system
Land 1.48 x land JPL Horizons JPL Horizons on-line ephemeris system
Love no k2 0.299 k2 Love no., k2 JPL Horizons JPL Horizons on-line ephemeris system
Magnetic moment 0.61 gauss Magnetic moment JPL Horizons JPL Horizons on-line ephemeris system
Mantle 4.043 x mantle JPL Horizons JPL Horizons on-line ephemeris system
Mean daily motion deg d 0.9856474 deg/d Mean daily motion, deg/d JPL Horizons JPL Horizons on-line ephemeris system
Mean effect temp te k 255 K Mean effect. temp (Te), K JPL Horizons JPL Horizons on-line ephemeris system
Mean sidereal day hr 23.93447 hr Mean sidereal day, hr JPL Horizons JPL Horizons on-line ephemeris system
Mean surface temp ts k 287.6 K Mean surface temp (Ts), K JPL Horizons JPL Horizons on-line ephemeris system
Moment of inertia 0.3308 Moment of inertia JPL Horizons JPL Horizons on-line ephemeris system
Oceans 1.4 oceans JPL Horizons JPL Horizons on-line ephemeris system
Outer core 1.835 x outer core JPL Horizons JPL Horizons on-line ephemeris system
Polar 9.832186 polar) JPL Horizons JPL Horizons on-line ephemeris system
Polar axis km 6,356.752 km Polar axis, km JPL Horizons JPL Horizons on-line ephemeris system
Rot rate rad s 7.29211e-05 rad/s Rot. Rate (rad/s) JPL Horizons JPL Horizons on-line ephemeris system
Sea 3.62 x sea JPL Horizons JPL Horizons on-line ephemeris system
Vis mag v 1 0 -3.86 Vis. mag. V(1,0) JPL Horizons JPL Horizons on-line ephemeris system
Volume km 3 1.08321 km^3 Volume, km^3 JPL Horizons JPL Horizons on-line ephemeris system

Provenance

where this card came from
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JPL Horizons 2026-08-14 17:08 open at source

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