J002E3
...that J002E3 was at first thought to be a new moon of the Earth when discovered in 2002 but later found to be the third stage of the Apollo 12 Saturn V?
...that <b id="mwxg"><a href="./J002E3" id="mwxw" rel="mw:WikiLink" title="J002E3">J002E3</a></b> was at first thought to be a new moon of the Earth when discovered in <a href="./2002" id="mwyA" rel="mw:WikiLink" title="2002">2002</a> but later found to be the <a href="./S-IVB" id="mwyQ" rel="mw:WikiLink" title="S-IVB">third stage</a> of the <a href="./Apollo_12" id="mwyg" rel="mw:WikiLink" title="Apollo 12">Apollo 12</a> <a href="./Saturn_V" id="mwyw" rel="mw:WikiLink" title="Saturn V">Saturn V</a>?