astro-0.4.2.1: Amateur astronomical computations

Data.Astro.Effects

Description

Physical effects which influence on accuracy of astronomical calculations.

# Documentation

Calculate the atmospheric refraction angle. It takes the observed altitude (of Horizon Coordinates), temperature in degrees centigrade and barometric pressure in millibars. The average sea level atmospheric pressure is 1013 millibars.

Constructors

 B1900 Epoch B1900.0 B1950 Epoch B1950.0 J2000 Epoch J2000.0 J2050 Epoch J2050.0

Instances

 Source # Methods Source # MethodsshowList :: [AstronomyEpoch] -> ShowS #

Low-precision method to calculate luni-solar precession. It takes Epoch, Equatorial Coordinates those correct at the given epoch, Julian Date of the observation. It returns corrected Equatorial Coordinates.

Rigorous method to calculate luni-solar precession. It takes julian date at whose the coordinates are correct, Equatorial Coordinates, Julian Date of the observation. It returns corrected Equatorial Coordinates.

Calculates the nutation on the ecliptic longitude at the given JulianDate

Calculates the nutation on the obliquity of the ecliptic at the given JulianDate

Includes aberration effect. It takes true Ecliptic Coordinates, the Sun's longitude at the given Julian Day (the third parameter). Returns apparent ecliptic coordinates. The Sun's longitude can be calculated using sunEclipticLongitude1 or sunEclipticLongitude2 of Data.Astro.Sun module.

Calculate the apparent position of the celestial object (the Sun or a planet). It takes geocraphic coordinates of the observer and height above sea-level of the observer measured in metres, distance from the celestial object to the Earth measured in AU, the Universal Time and geocentric equatorial coordinates. It returns adjusted equatorial coordinates.