1990 Earth-grazing meteoroid
... that the 1990 Earth-grazing meteoroid above Czechoslovakia and Poland was observed from two sites, which for the first time enabled geometrical calculations of the orbit of such a body?
... that the <b id="mwAiQ"><a href="./Earth-grazing_meteoroid_of_13_October_1990" id="mwAiU" rel="mw:WikiLink" title="Earth-grazing meteoroid of 13 October 1990">1990 Earth-grazing meteoroid</a></b> above <a href="./Czechoslovakia" id="mwAiY" rel="mw:WikiLink" title="Czechoslovakia">Czechoslovakia</a> and <a href="./Poland" id="mwAic" rel="mw:WikiLink" title="Poland">Poland</a> was observed from two sites, which for the first time enabled geometrical calculations of the <a href="./Orbit" id="mwAig" rel="mw:WikiLink" title="Orbit">orbit</a> of such a body?