The <a href="https://en.wikipedia.org/wiki/International_Astronomical_Union" id="mwAWs" rel="mw:WikiLink" title="International Astronomical Union">International Astronomical Union</a> names <a href="https://en.wikipedia.org/wiki/Moons_of_Pluto" id="mwAWw" rel="mw:WikiLink" title="Moons of Pluto">Pluto's fourth and fifth moons</a>, <a href="https://en.wikipedia.org/wiki/Kerberos_(moon)" id="mwAW0" rel="mw:WikiLink" title="Kerberos (moon)">Kerberos</a> and <a href="https://en.wikipedia.org/wiki/Styx_(moon)" id="mwAW4" rel="mw:WikiLink" title="Styx (moon)">Styx</a>.