Skyfield: Home • Table of Contents • Changelog • API Reference
Welcome to the documentation for Skyfield, the pure Python astronomy library that is accelerated using NumPy vector math!
planetary_magnitude()
load_constellation_map()
load_constellation_names()
parse_constellations()
parse_star_names()
find_discrete()
find_maxima()
find_minima()
Loader
load_file()
parse_tle_file()
Timescale
Time
compute_calendar_date()
VectorFunction
VectorFunction.center
VectorFunction.target
VectorFunction.at()
SpiceKernel
wgs84
iers2010
Geoid
Geoid.subpoint()
Geoid.latlon()
Geoid.latlon_of()
Geoid.height_of()
Geoid.geographic_position_of()
Geoid.subpoint_of()
GeographicPosition
GeographicPosition.model
GeographicPosition.latitude
GeographicPosition.longitude
GeographicPosition.elevation
GeographicPosition.itrs_xyz
GeographicPosition.center
GeographicPosition.at()
GeographicPosition.lst_hours_at()
GeographicPosition.refract()
GeographicPosition.rotation_at()
ITRSPosition
ITRSPosition.at()
find_risings()
find_settings()
find_transits()
seasons()
moon_phase()
moon_phases()
moon_nodes()
oppositions_conjunctions()
meridian_transits()
sunrise_sunset()
dark_twilight_day()
risings_and_settings()
lunar_eclipses()
phase_angle()
fraction_illuminated()
EarthSatellite
EarthSatellite.from_satrec()
EarthSatellite.ITRF_position_velocity_error()
EarthSatellite.find_events()
TEME
Star
ICRF
Barycentric
Astrometric
Apparent
Geocentric
position_of_radec()
true_equator_and_equinox_of_date
itrs
ecliptic_frame
ecliptic_J2000_frame
galactic_frame
PlanetaryConstants
PlanetaryConstants.read_text()
PlanetaryConstants.read_binary()
PlanetaryConstants.build_frame_named()
PlanetaryConstants.build_frame()
PlanetaryConstants.build_latlon_degrees()
Frame
Frame.rotation_at()
Frame.rotation_and_rate_at()
osculating_elements_of()
OsculatingElements
Distance
Distance.au()
Distance.km()
Distance.m()
Distance.length()
Distance.light_seconds()
Distance.to()
Velocity
Velocity.au_per_d()
Velocity.km_per_s()
Velocity.m_per_s()
Velocity.to()
Angle
Angle.radians()
Angle.hours()
Angle.degrees()
Angle.arcminutes()
Angle.arcseconds()
Angle.mas()
Angle.hms()
Angle.signed_hms()
Angle.hstr()
Angle.dms()
Angle.signed_dms()
Angle.dstr()
Angle.to()
AngleRate
AngleRate.radians()
AngleRate.degrees()
AngleRate.arcminutes()
AngleRate.arcseconds()
AngleRate.mas()
Rate
Rate.per_day()
Rate.per_hour()
Rate.per_minute()
Rate.per_second()
position_angle_of()