heliacal rising

(redirected from Heliacal setting)
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Related to Heliacal setting: Heliacal rising

heliacal rising

(hɪˈlaɪəkəl)
n
1. (Astronomy) the rising of a celestial object at approximately the same time as the rising of the sun
2. (Astronomy) the date at which such a celestial object first becomes visible in the dawn sky
[C17: from Late Latin hēliacus relating to the sun, from Greek hēliakos, from hēlios the sun]
References in periodicals archive ?
Other sources give the date of discovery in 1006 as May 1st and of heliacal setting as November 26th, adding the detail that the star was located in the 3rd degree east of Di - a measure of right ascension.