Checks if the helioprojective Cartesian coordinates are on the solar disk.

The check is performed by comparing the coordinate’s angular distance to the angular size of the solar radius. The solar disk is assumed to be a circle i.e., solar oblateness and other effects that cause the solar disk to be non-circular are not taken in to account.


coordinates (SkyCoord, Helioprojective) – The input coordinate. The coordinate frame must be Helioprojective.


bool – Returns True if the coordinate is on disk, False otherwise.