constants

Physical Constants

kete.constants.AU_KM = 149597870.7

AU in km.

kete.constants.AU_M = 149597870700

AU in meters by definition.

kete.constants.BOLTZMANN = 1.381e-23

J / K

kete.constants.C_V = 1329.0

Relationship constant for conversion between D, H_V, and p_V

kete.constants.EARTH_MAJOR_AXIS_M = 6378137.0

Earth semi major axis in meters.

kete.constants.EARTH_MINOR_AXIS_M = 6356752.3

Earth minor axis in meters.

kete.constants.EARTH_MOON_DIST_KM = 385000

Approximate average distance from the Earth to the Moon in km.

kete.constants.EARTH_RADIUS_AU = 4.26352124542639e-05

Earth radius in AU.

kete.constants.EARTH_RADIUS_M = 6378137.0

Earth radius in meters.

kete.constants.J2000 = 2451545.0

J2000 JD.

kete.constants.K_SUN = 0.01720209894846

AU^(3/2) per (Day sqrt(Solar Mass))

kete.constants.MOON_RADIUS_AU = 1.16138016662292e-05

Radius of the Moon in au.

kete.constants.PLANCK = 6.62618e-34

J * s

kete.constants.SOLAR_FLUX = 1360.8

W/m^2 measured at 1 AU.

kete.constants.SPEED_OF_LIGHT = 299792458.0

Meters per second

kete.constants.SPEED_OF_LIGHT_AUDAY = 173.14463267424034

AU per day

kete.constants.STEFAN_BOLTZMANN = 5.670374419e-08

J per K**4 m**2 s

kete.constants.SUN_GM = 0.00029591220828411956

Standard gravitational parameter, from DE440. au^3 / day^2

kete.constants.SUN_RADIUS_M = 696000000.0

Sun radius in meters.

kete.constants.SUN_TEMP = 5778

Sun’s effective black body temp in Kelvin.