Pix2Sky_Molleweide

class astropy.modeling.projections.Pix2Sky_Molleweide(*args, **kwargs)[source] [edit on github]

Bases: astropy.modeling.projections.Pix2SkyProjection, astropy.modeling.projections.PseudoCylindrical

Molleweide’s projection - pixel to sky.

Corresponds to the MOL projection in FITS WCS.

\[\begin{split}\phi &= \frac{\pi x}{2 \sqrt{2 - \left(\frac{\pi}{180^\circ}y\right)^2}} \\ \theta &= \sin^{-1}\left(\frac{1}{90^\circ}\sin^{-1}\left(\frac{\pi}{180^\circ}\frac{y}{\sqrt{2}}\right) + \frac{y}{180^\circ}\sqrt{2 - \left(\frac{\pi}{180^\circ}y\right)^2}\right)\end{split}\]

Methods Summary

evaluate(x, y)

Methods Documentation

classmethod evaluate(x, y)[source] [edit on github]