A heliacal rising, that special first reappearance of a planet, is what en te anatole referred to in ancient Greek astrology. Can Astronomy Explain the Biblical Star of Bethlehem? Recognizing that this number was almost identical to the synodic period of Venus (583.92 days, the time it takes ...
Adj.1.heliacal- pertaining to or near the sun; especially the first rising of a star after and last setting before its invisibility owing to its conjunction with the sun; "the heliacal rising of the Dog Star"; "the heliacal or Sothic year is determined by the heliacal rising of Sothis (...