Skip to content

Constants

Mathematical, physical, and astronomical constants used throughout the brahe library.

Categories

Units

Angle format enumerations and time system constants for specifying units and reference frames.

Mathematical Constants

Conversion factors for angles and other mathematical operations.

Time Constants

Julian date references and time system offset values.

Physical Constants

Physical properties of Earth, celestial bodies, and universal constants.

Quick Reference

All constants use SI base units unless otherwise noted:

  • Distance: meters (m)
  • Time: seconds (s)
  • Angles: radians (rad)
  • Gravitational Parameter: m³/s²

Constants are accessible directly from the brahe module:

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
import brahe as bh

# Mathematical constants
angle_rad = 45.0 * bh.DEG2RAD  # Convert degrees to radians

# Physical constants
mu_earth = bh.GM_EARTH  # Earth's gravitational parameter
c = bh.C_LIGHT          # Speed of light

# Time system
epoch = bh.Epoch.from_datetime(2024, 1, 1, 0, 0, 0.0, 0.0, bh.TimeSystem.UTC)