def METHOD_NAME():
    w = WCS(naxis=2)
    w.wcs.aux.rsun_ref = 698000000
    assert_allclose(w.wcs.aux.rsun_ref, 698000000)
    w.wcs.aux.dsun_obs = 140000000000
    assert_allclose(w.wcs.aux.dsun_obs, 140000000000)
    w.wcs.aux.crln_obs = 10.0
    assert_allclose(w.wcs.aux.crln_obs, 10.0)
    w.wcs.aux.hgln_obs = 30.0
    assert_allclose(w.wcs.aux.hgln_obs, 30.0)
    w.wcs.aux.hglt_obs = 40.0
    assert_allclose(w.wcs.aux.hglt_obs, 40.0)
    assert str(w.wcs.aux) == STR_EXPECTED_SET
    header = w.to_header()
    assert_allclose(header["RSUN_REF"], 698000000)
    assert_allclose(header["DSUN_OBS"], 140000000000)
    assert_allclose(header["CRLN_OBS"], 10.0)
    assert_allclose(header["HGLN_OBS"], 30.0)
    assert_allclose(header["HGLT_OBS"], 40.0)