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constants.rst

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Constants

.. py:module:: astrodynamics.constants


.. currentmodule:: astrodynamics.constants


.. autoclass:: Constant
   :members: name, uncertainty, reference

List of constants

Constant Value Uncertainty
CONSTANT_OF_GRAVITATION 6.67428 \times 10^{-11} \; \mathrm{\frac{m^{3}}{kg\,s^{2}}} 6.7e-15
SOLAR_MASS_PARAMETER 1.3271244 \times 10^{20} \; \mathrm{\frac{m^{3}}{s^{2}}} 10000000000.0
EARTH_RADIUS_EQUATORIAL 6378136.6 \; \mathrm{m} 0.1
J2 0.0010826359 \; \mathrm{} 1e-10
GEOCENTRIC_GRAVITATIONAL_CONSTANT 3.9860044 \times 10^{14} \; \mathrm{\frac{m^{3}}{s^{2}}} 800000.0
GEOID_POTENTIAL 62636856 \; \mathrm{\frac{m^{2}}{s^{2}}} 0.5
EARTH_ANGULAR_VELOCITY 7.292115 \times 10^{-5} \; \mathrm{\frac{rad}{s}} 0
MASS_RATIO_MOON_TO_EARTH 0.012300037 \; \mathrm{} 4e-10
MASS_RATIO_SUN_TO_MERCURY 6023600 \; \mathrm{} 300.0
MASS_RATIO_SUN_TO_VENUS 408523.72 \; \mathrm{} 0.008
MASS_RATIO_SUN_TO_MARS 3098703.6 \; \mathrm{} 0.02
MASS_RATIO_SUN_TO_JUPITER 1047.3486 \; \mathrm{} 1.7e-05
MASS_RATIO_SUN_TO_SATURN 3497.9018 \; \mathrm{} 0.0001
MASS_RATIO_SUN_TO_URANUS 22902.98 \; \mathrm{} 0.03
MASS_RATIO_SUN_TO_NEPTUNE 19412.26 \; \mathrm{} 0.03
MASS_RATIO_SUN_TO_PLUTO 1.36566 \times 10^{8} \; \mathrm{} 28000.0
MERCURY_RADIUS_MEAN 2439.9 \; \mathrm{km} 1
MERCURY_RADIUS_EQUATORIAL 2439.9 \; \mathrm{km} 1
MERCURY_RADIUS_POLAR 2439.9 \; \mathrm{km} 1
VENUS_RADIUS_MEAN 6051.8 \; \mathrm{km} 1
VENUS_RADIUS_EQUATORIAL 6051.8 \; \mathrm{km} 1
VENUS_RADIUS_POLAR 6051.8 \; \mathrm{km} 1
EARTH_RADIUS_MEAN 6371.0084 \; \mathrm{km} 0.0001
EARTH_RADIUS_POLAR 6356.7519 \; \mathrm{km} 0.0001
MARS_RADIUS_MEAN 3389.5 \; \mathrm{km} 0.2
MARS_RADIUS_EQUATORIAL 3396.19 \; \mathrm{km} 0.1
MARS_RADIUS_POLAR 3376.2 \; \mathrm{km} 0.1
JUPITER_RADIUS_MEAN 69911 \; \mathrm{km} 6
JUPITER_RADIUS_EQUATORIAL 71492 \; \mathrm{km} 4
JUPITER_RADIUS_POLAR 66854 \; \mathrm{km} 10
SATURN_RADIUS_MEAN 58232 \; \mathrm{km} 6
SATURN_RADIUS_EQUATORIAL 60268 \; \mathrm{km} 4
SATURN_RADIUS_POLAR 54364 \; \mathrm{km} 10
URANUS_RADIUS_MEAN 25362 \; \mathrm{km} 7
URANUS_RADIUS_EQUATORIAL 25559 \; \mathrm{km} 4
URANUS_RADIUS_POLAR 24973 \; \mathrm{km} 20
NEPTUNE_RADIUS_MEAN 24622 \; \mathrm{km} 19
NEPTUNE_RADIUS_EQUATORIAL 24764 \; \mathrm{km} 15
NEPTUNE_RADIUS_POLAR 24341 \; \mathrm{km} 30
PLUTO_RADIUS_MEAN 1195 \; \mathrm{km} 5
PLUTO_RADIUS_EQUATORIAL 1195 \; \mathrm{km} 5
PLUTO_RADIUS_POLAR 1195 \; \mathrm{km} 5
MOON_RADIUS_MEAN 1737.4 \; \mathrm{km} 1
MOON_RADIUS_EQUATORIAL 1737.4 \; \mathrm{km} 1
MOON_RADIUS_POLAR 1737.4 \; \mathrm{km} 1
SUN_RADIUS_EQUATORIAL 696000 \; \mathrm{km} 1
SUN_MASS 1.9884159 \times 10^{30} \; \mathrm{kg} N/A
EARTH_MASS 5.9721864 \times 10^{24} \; \mathrm{kg} N/A
MOON_MASS 7.3458114 \times 10^{22} \; \mathrm{kg} N/A
MERCURY_MASS 3.3010423 \times 10^{23} \; \mathrm{kg} N/A
VENUS_MASS 4.8673205 \times 10^{24} \; \mathrm{kg} N/A
MARS_MASS 6.4169283 \times 10^{23} \; \mathrm{kg} N/A
JUPITER_MASS 1.8985234 \times 10^{27} \; \mathrm{kg} N/A
SATURN_MASS 5.684596 \times 10^{26} \; \mathrm{kg} N/A
URANUS_MASS 8.6819089 \times 10^{25} \; \mathrm{kg} N/A
NEPTUNE_MASS 1.0243093 \times 10^{26} \; \mathrm{kg} N/A
PLUTO_MASS 1.4560109 \times 10^{22} \; \mathrm{kg} N/A
WGS84_EQUATORIAL_RADIUS 6378137 \; \mathrm{m} 0
WGS84_FLATTENING 0.0033528107 \; \mathrm{} 0
WGS84_MU 3.9860044 \times 10^{14} \; \mathrm{\frac{m^{3}}{s^{2}}} 0
WGS84_ANGULAR_VELOCITY 7.292115 \times 10^{-5} \; \mathrm{\frac{rad}{s}} 0

References

Constant Full name Reference
CONSTANT_OF_GRAVITATION Constant of gravitation IAU 2009/2012 System of Astronomical Constants
SOLAR_MASS_PARAMETER Solar mass parameter (TCB) IAU 2009/2012 System of Astronomical Constants
EARTH_RADIUS_EQUATORIAL Equatorial radius of Earth (TT) IAU 2009/2012 System of Astronomical Constants
J2 Dynamical form-factor for the Earth IAU 2009/2012 System of Astronomical Constants
GEOCENTRIC_GRAVITATIONAL_CONSTANT Geocentric gravitational constant (TCB) IAU 2009/2012 System of Astronomical Constants
GEOID_POTENTIAL Potential of the geoid IAU 2009/2012 System of Astronomical Constants
EARTH_ANGULAR_VELOCITY Nominal mean angular velocity of the Earth (TT) IAU 2009/2012 System of Astronomical Constants
MASS_RATIO_MOON_TO_EARTH Mass ratio: Moon to Earth IAU 2009/2012 System of Astronomical Constants
MASS_RATIO_SUN_TO_MERCURY Mass ratio: Sun to Mercury IAU 2009/2012 System of Astronomical Constants
MASS_RATIO_SUN_TO_VENUS Mass ratio: Sun to Venus IAU 2009/2012 System of Astronomical Constants
MASS_RATIO_SUN_TO_MARS Mass ratio: Sun to Mars IAU 2009/2012 System of Astronomical Constants
MASS_RATIO_SUN_TO_JUPITER Mass ratio: Sun to Jupiter IAU 2009/2012 System of Astronomical Constants
MASS_RATIO_SUN_TO_SATURN Mass ratio: Sun to Saturn IAU 2009/2012 System of Astronomical Constants
MASS_RATIO_SUN_TO_URANUS Mass ratio: Sun to Uranus IAU 2009/2012 System of Astronomical Constants
MASS_RATIO_SUN_TO_NEPTUNE Mass ratio: Sun to Neptune IAU 2009/2012 System of Astronomical Constants
MASS_RATIO_SUN_TO_PLUTO Mass ratio: Sun to Pluto (134340) IAU 2009/2012 System of Astronomical Constants
MERCURY_RADIUS_MEAN Mean radius of Mercury IAU WG on Cartographic Coordinates and Rotational Elements 2009
MERCURY_RADIUS_EQUATORIAL Equatorial radius of Mercury IAU WG on Cartographic Coordinates and Rotational Elements 2009
MERCURY_RADIUS_POLAR Polar radius of Mercury IAU WG on Cartographic Coordinates and Rotational Elements 2009
VENUS_RADIUS_MEAN Mean radius of Venus IAU WG on Cartographic Coordinates and Rotational Elements 2009
VENUS_RADIUS_EQUATORIAL Equatorial radius of Venus IAU WG on Cartographic Coordinates and Rotational Elements 2009
VENUS_RADIUS_POLAR Polar radius of Venus IAU WG on Cartographic Coordinates and Rotational Elements 2009
EARTH_RADIUS_MEAN Mean radius of Earth IAU WG on Cartographic Coordinates and Rotational Elements 2009
EARTH_RADIUS_POLAR Polar radius of Earth IAU WG on Cartographic Coordinates and Rotational Elements 2009
MARS_RADIUS_MEAN Mean radius of Mars IAU WG on Cartographic Coordinates and Rotational Elements 2009
MARS_RADIUS_EQUATORIAL Equatorial radius of Mars IAU WG on Cartographic Coordinates and Rotational Elements 2009
MARS_RADIUS_POLAR Polar radius of Mars IAU WG on Cartographic Coordinates and Rotational Elements 2009
JUPITER_RADIUS_MEAN Mean radius of Jupiter IAU WG on Cartographic Coordinates and Rotational Elements 2009
JUPITER_RADIUS_EQUATORIAL Equatorial radius of Jupiter IAU WG on Cartographic Coordinates and Rotational Elements 2009
JUPITER_RADIUS_POLAR Polar radius of Jupiter IAU WG on Cartographic Coordinates and Rotational Elements 2009
SATURN_RADIUS_MEAN Mean radius of Saturn IAU WG on Cartographic Coordinates and Rotational Elements 2009
SATURN_RADIUS_EQUATORIAL Equatorial radius of Saturn IAU WG on Cartographic Coordinates and Rotational Elements 2009
SATURN_RADIUS_POLAR Polar radius of Saturn IAU WG on Cartographic Coordinates and Rotational Elements 2009
URANUS_RADIUS_MEAN Mean radius of Uranus IAU WG on Cartographic Coordinates and Rotational Elements 2009
URANUS_RADIUS_EQUATORIAL Equatorial radius of Uranus IAU WG on Cartographic Coordinates and Rotational Elements 2009
URANUS_RADIUS_POLAR Polar radius of Uranus IAU WG on Cartographic Coordinates and Rotational Elements 2009
NEPTUNE_RADIUS_MEAN Mean radius of Neptune IAU WG on Cartographic Coordinates and Rotational Elements 2009
NEPTUNE_RADIUS_EQUATORIAL Equatorial radius of Neptune IAU WG on Cartographic Coordinates and Rotational Elements 2009
NEPTUNE_RADIUS_POLAR Polar radius of Neptune IAU WG on Cartographic Coordinates and Rotational Elements 2009
PLUTO_RADIUS_MEAN Mean radius of Pluto (134340) IAU WG on Cartographic Coordinates and Rotational Elements 2009
PLUTO_RADIUS_EQUATORIAL Equatorial radius of Pluto (134340) IAU WG on Cartographic Coordinates and Rotational Elements 2009
PLUTO_RADIUS_POLAR Polar radius of Pluto (134340) IAU WG on Cartographic Coordinates and Rotational Elements 2009
MOON_RADIUS_MEAN Mean radius of Moon IAU WG on Cartographic Coordinates and Rotational Elements 2009
MOON_RADIUS_EQUATORIAL Equatorial radius of Moon IAU WG on Cartographic Coordinates and Rotational Elements 2009
MOON_RADIUS_POLAR Polar radius of Moon IAU WG on Cartographic Coordinates and Rotational Elements 2009
SUN_RADIUS_EQUATORIAL Equatorial radius of Sun IAU WG on Cartographic Coordinates and Rotational Elements 2009
WGS84_EQUATORIAL_RADIUS WGS84 semi-major axis World Geodetic System 1984
WGS84_FLATTENING WGS84 Earth flattening factor World Geodetic System 1984
WGS84_MU WGS84 geocentric gravitational constant World Geodetic System 1984
WGS84_ANGULAR_VELOCITY WGS84 nominal earth mean angular velocity World Geodetic System 1984