webbpsf_ext.coords.radec_offset

webbpsf_ext.coords.radec_offset(ra, dec, dist, pos_ang)[source]

Return (RA, Dec) of a position offset relative to some input (RA, Dec).

Parameters

  • RA (float) – Input RA in deg.

  • Dec (float) – Input Dec in deg.

  • dist (float) – Angular distance in arcsec. Can also be an array of distances.

  • pos_ang (float) – Position angle (positive angles East of North) in degrees. Can also be an array; must match size of dist.

Returns

  • Two elements, RA and Dec of calculated offsets in dec degrees.

  • If multiple offsets specified, then this will be two arrays

  • of RA and Dec, where eac array has the same size as inputs.