# 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` | m³/s² |
| `omega_earth` | rad/s |
| `c` | m/s |
| `wgs84_f`, `earth_moon_mass_ratio`, `jgm3_j2` | unitless |
::: satkit.consts