planetsconstants(1)

PlanetsConstants

SHTOOLS Module containing planetary constants.

Description

PlanetsConstants defines several constants that are used in analyzing gravity, topography, and magnetic field data of the terrestrial planets. All units are SI. Confer with the Python attributes of the constant for exact values and references.

Constants

  Fundamental Constants

Grav_constant
    Gravitational Constant.

Pi_constant
    Pi.

Mu0_constant
    Magnetic constant.

  Mercury

R_Mercury
    Average radius of Mercury.

GM_Mercury
    Gravitational constant times the mass of the Mercury.

Mass_Mercury
    Mass of Mercury.

Omega_Orbit_Mercury
    Angular rotation rate of Mercury about the Sun.

Omega_Mercury
    Angular rotation rate of Mercury.

Density_Mercury
    Average density of Mercury.

G0_Mercury
    Gravitational acceleration at R_Mercury, not including rotation.

  Venus

R_Venus
    Average radius of Venus.

GM_Venus
    Gravitational constant times the mass of the Venus.

Mass_Venus
    Mass of Venus.

Omega_Venus
    Angular rotation rate of Venus.

Density_Venus
    Average density of Venus.

G0_Venus
    Gravitational acceleration at R_Venus, not including rotation.

  Earth

GM_EGM2008
    Gravitational constant times the mass of the Earth from the EGM2008 model.

Mass_EGM2008
    The mass of the Earth from the EGM2008 model.

A_WGS84
    The semi-major axis of the WGS84 ellipsoid.

B_WGS84
    The semi-minor axis of the WGS84 ellipsoid.

R3_WGS84
    The radius of a sphere of Earth’s volume.

F_WGS84
    The flattening of the WGS84 ellipsoid.

GM_WGS84
    The adopted GM of the WGS84 model, which includes the atmosphere.

Mass_WGS84
    The mass of the Earth from the WGS84 model.

GMA_WGS84
    The GM of the atmosphere adopted by the WGS84 model.

Omega_WGS84
    The adopted angular rotation rate of the Earth of the WGS84 model.

U0_WGS84
    The theoretical normal potential associated with the WGS84 model.

  The Moon

R_Moon
    Mean radius of the Moon.

GM_Moon
    Gravitational constant times the mass of the Moon.

Mass_Moon
    Mass of the Moon.

Density_Moon
    Average density of the Moon.

A_Orbit_Moon
    Semi-major axis of the lunar orbit.

Omega_Moon
    Angular rotation rate of the Moon.

I_Solid_Moon
    Average moment of inertia of the solid portion of the Moon.

Gamma_Moon
    Libration parameter of the Moon, (B-A)/C.

Beta_Moon
    Libration parameter of the Moon, (C-A)/B.

G0_Moon
    Mean gravitational acceleration of the Moon at the mean surface radius (R_Moon), not including rotation.

  Mars

R_Mars
    Average radius of Mars.

GM_Mars
    Gravitational constant times the mass of the Mars.

Mass_Mars
    Mass of Mars.

Density_Mars
    Average density of Mars.

Omega_Mars
    Angular rotation rate of Mars.

F_Mars
    Topographic flattening of Mars.

A_Mars
    Semi-major axis radius of Mars.

B_Mars
    Semi-minor axis radius of Mars.

U0_mars
    Reference potential of Mars.

G0_Mars
    Gravitational acceleration of Mars at R_Mars, not including rotation.