NGC 6067
... that the open cluster NGC 6067 is 15 to 20 times as rich as the Pleiades?
... that the open cluster <b id="mwAak"><a href="./NGC_6067" id="mwAao" rel="mw:WikiLink" title="NGC 6067">NGC 6067</a></b> is 15 to 20 times as <a class="mw-redirect" href="./Trumpler_classification" id="mwAas" rel="mw:WikiLink" title="Trumpler classification">rich</a> as the <a href="./Pleiades" id="mwAaw" rel="mw:WikiLink" title="Pleiades">Pleiades</a>?