UPSA Object Registry
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Mars

Planet JPL Horizons
Mean radius
3,389.9 km
Mass
6.4171 1e23 kg
Density
3.933 g/cm^3
Surface gravity
3.71 m/s^2
Rotation period
24.623 hr
Geometric albedo
0.15
Mean temperature
210 K

Also known as

1 identifiers

Horizons 499

Recorded parameters

23 quantities with a single published value
ParameterValueUnitUncertainty As publishedSourceReference
Mass 6.4171 1e23 kg Mass x10^23 (kg) JPL Horizons JPL Horizons on-line ephemeris system
Mean radius 3,389.92 km Vol. mean radius (km) JPL Horizons JPL Horizons on-line ephemeris system
Equatorial radius 3,396.19 km Equatorial radius (km) JPL Horizons JPL Horizons on-line ephemeris system
Density 3.933 g/cm^3 Density (g/cm^3) JPL Horizons JPL Horizons on-line ephemeris system
Rotation period 24.62296 hr Sidereal rot. period JPL Horizons JPL Horizons on-line ephemeris system
Geometric albedo 0.15 Geometric Albedo JPL Horizons JPL Horizons on-line ephemeris system
Escape velocity 5.027 km/s Escape speed, km/s JPL Horizons JPL Horizons on-line ephemeris system
GM 42,828.38 km^3/s^2 GM (km^3/s^2) JPL Horizons JPL Horizons on-line ephemeris system
Mean temperature 210 K Mean temperature (K) JPL Horizons JPL Horizons on-line ephemeris system
Obliquity to orbit 25.19 deg Obliquity to orbit JPL Horizons JPL Horizons on-line ephemeris system
Mean orbital speed 24.13 km/s Orbital speed, km/s JPL Horizons JPL Horizons on-line ephemeris system
Surface gravity 3.71 m/s^2 Equ. gravity m/s^2 JPL Horizons JPL Horizons on-line ephemeris system
Atmospheric pressure 0.0056 bar Atmos. pressure (bar) JPL Horizons JPL Horizons on-line ephemeris system
Core radius km ~1700 km Core radius (km) JPL Horizons JPL Horizons on-line ephemeris system
Flattening f 1 f Flattening, f JPL Horizons JPL Horizons on-line ephemeris system
Hill s sphere rad rp 319.8 Hill's sphere rad. Rp JPL Horizons JPL Horizons on-line ephemeris system
Mass ratio sun mars 3,098,704 sun/mars Mass ratio (Sun/Mars) JPL Horizons JPL Horizons on-line ephemeris system
Max angular diam 17.9 " Max. angular diam. JPL Horizons JPL Horizons on-line ephemeris system
Mean sidereal orb per 686.98 d Mean sidereal orb per JPL Horizons JPL Horizons on-line ephemeris system
Polar gravity m s 2 3.758 m/s^2 Polar gravity m/s^2 JPL Horizons JPL Horizons on-line ephemeris system
Sid rot rate rad s 7.08822e-05 rad/s Sid. rot. rate, rad/s JPL Horizons JPL Horizons on-line ephemeris system
Visual mag v 1 0 -1.52 Visual mag. V(1,0) JPL Horizons JPL Horizons on-line ephemeris system
Volume x10 10 km 3 16.318 x10^10 km^3 Volume (x10^10 km^3) 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/mars · Registry entry updated 2026-08-14.