docs: def onSiliconCheck(ra_deg, dec_deg, FovObj, padding_pix=DEFAULT_PADDING):
      """Check a single position."""
      dist = angSepVincenty(FovObj.ra0_deg, FovObj.dec0_deg, ra_deg, dec_deg)
      if dist >= 90.:
          return False
      # padding_pix=3 means that objects less than 3 pixels off the edge of
      # a channel are counted inside, to account for inaccuracies in K2fov.
      return FovObj.isOnSilicon(ra_deg, dec_deg, padding_pix=padding_pix)