Constants

Units

Symbol	Unit
`wgs84_a`, `earth_radius`, `au`, `sun_radius`, `moon_radius`, `geo_r`, `jgm3_a`	`m`
`mu_earth`, `mu_moon`, `mu_sun`, `GM`, `jgm3_mu`	`m^3/s^2`
`omega_earth`	`rad/s`
`c`	`m/s`
`wgs84_f`, `earth_moon_mass_ratio`, `jgm3_j2`	unitless

API Reference

class satkit.consts: Some constants that are useful for saetllite dynamics

Reference / Shape Constants

consts.wgs84_a = 6378137.0

consts.wgs84_f = 0.003352810664747

consts.earth_radius = 6378137.0

Gravitational Constants

consts.mu_earth = 398600441800000.0

consts.mu_moon = 4904869500000.0

consts.mu_sun = 1.32712440018e+20

consts.GM = 398600441800000.0

Rotation, Light, and Distance Constants

consts.omega_earth = 7.29211509e-05

consts.c = 299792458.0

consts.au = 149597870700.0

consts.geo_r = 42164172.58422766

Body Size / Ratio Constants

consts.sun_radius = 695500000.0

consts.moon_radius = 1737400.0

consts.earth_moon_mass_ratio = 81.30056822149722

JGM3 Model Constants

consts.jgm3_mu = 398600441500000.0

consts.jgm3_a = 6378136.3

consts.jgm3_j2 = -0.0010826360229829945