solar_angular_radius#
- sunpy.map.solar_angular_radius(coordinates)[source]#
Calculates the solar angular radius as seen by the observer.
The tangent vector from the observer to the edge of the Sun forms a right-angle triangle with the radius of the Sun as the far side and the Sun-observer distance as the hypotenuse. Thus, the sine of the angular radius of the Sun is ratio of these two distances.
- Parameters:
coordinates (
SkyCoord
,Helioprojective
) – The input coordinate. The coordinate frame must beHelioprojective
.- Returns:
angle (
Quantity
) – The solar angular radius.