The Venus tablet of Ammisaduqa (Enuma Anu Enlil Tablet 63) refers to the record of astronomical observations of Venus, as preserved in numerous cuneiform tablets dating from the first millennium BC. It is believed that this astronomical record was first compiled during the reign of King Ammisaduqa (or Ammizaduga). The origins of this text are dated to around the mid-seventh century BC. The tablet recorded the rise times of Venus and its first and last visibility on the horizon before or after sunrise and sunset in the form of lunar dates. These observations were recorded for a period of 21 years. This Venus tablet is part of Enuma anu enlil ("In the days of Anu and Enlil"), a long text dealing with Babylonian astrology, which mostly consists of omens interpreting celestial phenomena.