Al-Mahani
... that the ninth-century astronomer Al-Mahani claimed his estimates of the start times of three consecutive lunar eclipses were accurate to within half an hour?
... that the ninth-century astronomer <b id="mwBQA"><a href="./Al-Mahani" id="mwBQE" rel="mw:WikiLink" title="Al-Mahani">Al-Mahani</a></b> claimed his estimates of the start times of three consecutive <a href="./Lunar_eclipse" id="mwBQI" rel="mw:WikiLink" title="Lunar eclipse">lunar eclipses</a> were accurate to within half an hour?