def METHOD_NAME():
    w = WCS(naxis=1)
    assert w.wcs.aux.rsun_ref is None
    assert w.wcs.aux.dsun_obs is None
    assert w.wcs.aux.crln_obs is None
    assert w.wcs.aux.hgln_obs is None
    assert w.wcs.aux.hglt_obs is None
    assert str(w.wcs.aux) == STR_EXPECTED_EMPTY