
Ga1-22	Ga1-23 (496)	Ga1-24 (25)	*Ga1-25 (90)**	Ga1-26
γ Leporis (494.9)	Saiph (495.5), ζ Leporis (495.6)	Wezn (496.6), δ Leporis (496.7), Betelgeuze (497.3)	η Leporis (498.0), Praja-pāti, Menkalinan, Mahashim, and γ Columbae (498.3)	η Columbae (498.7), μ Orionis (499.3)
June 16	17	June 18 (169)	19	6h (499.3)

Counting from atariki and the heliacal rising of δ Leporis in June 18 (day 169 in our calendar) we will reach the heliacal rising of δ Lupi in November 9 after 144 days.

Wikipedia:

Delta (uppercase Δ, lowercase δ) ... is the fourth letter of the Greek alphabet. In the system of Greek numerals it has a value of 4. It was derived from the Phoenician letter Dalet

Letters that come from delta include Latin D and Cyrillic Д.

A river delta (originally, the Nile River delta) is so named because its shape approximates the upper-case letter delta (the shape is a triangle) ...

Dalet (dāleth, also spelled Daleth or Daled) is the fourth letter of many Semitic alphabets ... The letter is based on a glyph of the Middle Bronze Age alphabets, probably called dalt 'door' (door in Modern Hebrew is delet), ultimately based on a hieroglyph depicting a door

The Egyptian glyph has the door lying on its side, possibly 'to kill' it, making it harmless (number 4 is unlucky). A door is a dangerous place, you never know what you will encounter on the other side. The picture below is from Wilkinson, Hieroglyphernas Värld:

Wilkinson says it is from the grave of Sennedjem (Thebe, 19th dynasty) and we can here see 'the doors to heaven'.