CFHQS J2329–0301 (also known as CFHQS J232908–030158) is a quasar in the constellation of Pisces. It has a redshift of about 6.417, meaning that it is seen as it appeared when the universe was less than one billion years old. It was discovered in 2007 by the Canada–France High-z Quasar Survey (CFHQS), using the Canada–France–Hawaii Telescope (CFHT). At the time of its discovery, CFHQS J2329–0301 was the most distant known quasar. It surpassed SDSS J1148+5251 and held the record until the discovery of ULAS J1120+0641 in 2011. The quasar has been studied as a distant background source for studying the intergalactic medium, the epoch of reionization and the formation of early supermassive black holes.
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