code: def pix2sky(self, pixel):
          
          pixbox = numpy.array([pixel, pixel])
          skybox = self.wcs.all_pix2world(pixbox, 1)
          return [float(skybox[0][0]), float(skybox[0][1])]
docs: Get the sky coordinates for a given image pixel.
  
          Parameters
          ----------
          pixel : (float, float)
              Image coordinates.
  
          Returns
          -------
          ra,dec : float
              Sky coordinates (degrees)