Solar ephemeris

Ephemeris are astronomical data, for example positions of the Sun. Shadows provides a complete set of data for the Sun, organized in several families.

	General Ephemeris These are data valid for the whole year for a given location, such as instant of solstices and equinoxes, duration of seasons, duration of the shortest/longest day, instant of perihelion/aphelion, obliquity of ecliptic, eccentricity of orbit, date of Easter, Qibla.
	Daily Ephemeris These are astronomical data valid for a given day: Julian day, day of the year, day of the week, Julian century, equation of time, sidereal time, equatorial position of Sun (right ascension, declination), orbital parameters (mean/true/apparent longitude, mean/true anomaly, equation of the center, distance to Earth) or noticeable hours (sunrise, sunset, meridian crossing, twilights)
	Instant Ephemeris These data are calculated for a given instant or can be updated in real time every second.
	Ephemeris Generator The generator will create a table with data calculated every hours or every 5 or 15 minutes). The table can be open automatically in Excel.

Photos:
- top banner: extract from John Flamsteed Atlas, 1795.

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