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- Pix2Sky_Molleweide

# Pix2Sky_Molleweide

class astropy.modeling.projections.Pix2Sky_Molleweide(*args, **kwargs)

  Bases: `Pix2SkyProjection`, `PseudoCylindrical`

  Molleweide’s projection - pixel to sky.

  Corresponds to the `MOL` projection in FITS WCS.

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