astra.constants module

ASTRA Core constants. All simulation parameters, physical constants, orbital regime boundaries, and conjunction thresholds used across the library. These are module-level immutable values — no mutable state.

astra.constants.R_GAS = 8.314462618

Universal gas constant (J/K/mol) — inlined in propagator._nrlmsise00_density_njit.

astra.constants.G0_STD_KM_S2 = 0.00980665

G0 expressed in km/s² for use inside Numba kernels that work in km. propagator._powered_derivative_njit inlines g0 = 9.80665e-3 directly; this constant documents the conversion and is guarded below.