## Position of the Sun |

The **position of the Sun** in the

To find the Sun's position for a given location at a given time, one may therefore proceed in three steps as follows:^{[1]}^{[2]}

- calculate the Sun's position in the
ecliptic coordinate system , - convert to the
equatorial coordinate system , and - convert to the
horizontal coordinate system , for the observer's local time and location.

This calculation is useful in

- approximate position
- declination of the sun as seen from earth
- equation of time
- analemma
- see also
- references
- external links

These equations, from the * Astronomical Almanac*,

Start by calculating *n*, the number of days (positive or negative) since Greenwich noon, Terrestrial Time, on 1 January 2000 (

The

The

Put and in the range 0° to 360° by adding or subtracting

Finally, the

The

- ,

as the ^{[5]}

and the distance of the Sun from the Earth, in

- .

, and form a complete position of the

- , where is in the same
quadrant as ,

To get RA at the right quadrant on computer programs use double argument Arctan function such as ATAN2(y,x)

and

- .

In ^{[6]}
), in

Where the

for use with the above equations.

Other Languages

العربية: موقع الشمس

català: Declinació solar

español: Declinación solar

slovenščina: Navidezna lega Sonca

中文: 太陽位置