Pix2Sky_ZenithalEqualArea¶

class astropy.modeling.projections.Pix2Sky_ZenithalEqualArea(*args, **kwargs)[source]¶

Zenithal equidistant projection - pixel to sky.

Corresponds to the ZEA projection in FITS WCS.

See Zenithal for a definition of the full transformation.

\[\theta = 90^\circ - 2 \sin^{-1} \left(\frac{\pi R_\theta}{360^\circ}\right)\]