Constants

API Reference

class satkit.consts

Some constants that are useful for saetllite dynamics

GM() → float

Gravitational parameter of Earth, m^3/s^2

au() → float

Astronomical Unit, mean Earth-Sun distance, meters

c() → float

Speed of light, m/s

earth_moon_mass_ratio() → float

Earth mass over Moon mass, unitless

earth_radius() → float

Earth radius along major axis, meters

geo_r() → float

Distance to Geosynchronous orbit from Earth center, meters

jgm3_a() → float

Earth semiparameter from JGM3 gravity model, m

jgm3_j2() → float

“J2” gravity due oblateness of Earth from JGM3 gravity model, unitless

jgm3_mu() → float

Earth gravitational parameter from JGM3 gravity model, m^3/s^2

moon_radius() → float

Radius of moon, meters

mu_earth() → float

Gravitational parameter of Earth, m^3/s^2

mu_moon() → float

Gravitational parameter of Moon, m^3/s^2

mu_sun() → float

Gravitational parameter of sun, m^3/s^2

omega_earth() → float

Scalar Earth rotation rate, rad/s

sun_radius() → float

Radius of sun, meters

wgs84_a() → float

WGS-84 semiparameter, in meters

wgs84_f() → float

WGS-84 flattening in meters