supernovas::Constant Class Reference

Various physical constants that SuperNOVAS uses for astrometric calculations, all expressed in terms of SI units. More...

#include <supernovas.h>

Static Public Attributes
static constexpr double	c = NOVAS_C
	[rad] π/2
static constexpr double	F_earth = NOVAS_GRS80_FLATTENING
	GRS80 Earth flattening.
static constexpr double	G = 6.67428e-1
	[m3 kg-1 s-2]
static constexpr double	GM_earth = NOVAS_G_EARTH
	[m3 s-2] Earth graviational constant
static constexpr double	GM_sun = NOVAS_G_SUN
	[m3 s-2] Solar graviational constant
static constexpr double	half_pi = 0.5 * pi
	[rad] 2π
static constexpr double	L_B = 1.550519768e-8
	Barycentric clock rate increment over TT.
static constexpr double	L_G = 6.969290134e-10
	Geocentric clock rate increment over TT.
static constexpr double	M_earth = GM_sun / G
	[kg] Earth mass
static constexpr double	M_sun = GM_sun / G
	[kg] Mass of the Sun
static constexpr double	pi = M_PI
static constexpr double	R_earth = NOVAS_GRS80_RADIUS
static constexpr double	two_pi = TWOPI
	[rad] π

Detailed Description

Various physical constants that SuperNOVAS uses for astrometric calculations, all expressed in terms of SI units.

You can use them also. For example, you might use Constant::c to turn a velocity (im m/s) to a unitless β:

double beta = (29.5 * Unit::km / Unit::sec) / Constant::c;

Note, this class cannot be instantiated or copied. You should only use its static fields.

See also

Unit

Member Data Documentation

c

double supernovas::Constant::c = NOVAS_C

staticconstexpr

[rad] π/2

[m/s] speed of light

Referenced by supernovas::ScalarVelocity::ScalarVelocity(), supernovas::Velocity::Velocity(), supernovas::ScalarVelocity::beta(), supernovas::AstrometricPosition::obs_time(), supernovas::ScalarVelocity::operator+(), supernovas::ScalarVelocity::operator-(), supernovas::CatalogEntry::radial_velocity(), and supernovas::CatalogEntry::v_lsr().

F_earth

double supernovas::Constant::F_earth = NOVAS_GRS80_FLATTENING

staticconstexpr

GRS80 Earth flattening.

G

double supernovas::Constant::G = 6.67428e-1

staticconstexpr

[m³ kg^-1 s^-2]

GM_earth

double supernovas::Constant::GM_earth = NOVAS_G_EARTH

staticconstexpr

[m³ s^-2] Earth graviational constant

GM_sun

double supernovas::Constant::GM_sun = NOVAS_G_SUN

staticconstexpr

[m³ s^-2] Solar graviational constant

half_pi

double supernovas::Constant::half_pi = 0.5 * pi

staticconstexpr

[rad] 2π

Referenced by supernovas::Site::Site(), supernovas::Spherical::Spherical(), supernovas::Orbital::pole(), supernovas::Orbital::pole(), supernovas::OrbitalSystem::pole(), supernovas::OrbitalSystem::pole(), and supernovas::Horizontal::zenith_angle().

L_B

double supernovas::Constant::L_B = 1.550519768e-8

staticconstexpr

Barycentric clock rate increment over TT.

L_G

double supernovas::Constant::L_G = 6.969290134e-10

staticconstexpr

Geocentric clock rate increment over TT.

M_earth

double supernovas::Constant::M_earth = GM_sun / G

staticconstexpr

[kg] Earth mass

M_sun

double supernovas::Constant::M_sun = GM_sun / G

staticconstexpr

[kg] Mass of the Sun

Referenced by supernovas::Planet::mass().

pi

double supernovas::Constant::pi = M_PI

staticconstexpr

R_earth

double supernovas::Constant::R_earth = NOVAS_GRS80_RADIUS

staticconstexpr

two_pi

double supernovas::Constant::two_pi = TWOPI

staticconstexpr

[rad] π

Referenced by supernovas::Orbital::apsis_rate(), supernovas::Orbital::apsis_rate(), supernovas::Angle::equals(), supernovas::Angle::fraction(), supernovas::Orbital::from_mean_motion(), supernovas::Orbital::node_rate(), supernovas::Orbital::node_rate(), and supernovas::Orbital::period().