heliacal


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Related to heliacal: Heliacal setting

he·li·a·cal

 (hĭ-lī′ə-kəl)
adj.
Of or relating to the sun, especially rising and setting with the sun.

[From Late Latin hēliacus, from Greek hēliakos, from hēlios, sun; see sāwel- in Indo-European roots.]

he·li′a·cal·ly adv.

he•li•a•cal

(hɪˈlaɪ ə kəl)

adj.
pertaining to or occurring near the sun, esp. applied to such risings and settings of a star as most nearly coincide with sunrise or sunset.
[1600–10; < Late Latin hēliac(us) (< Greek hēliakós; see helio-, -ac) + -al1]
he•li′a•cal•ly, adv.
ThesaurusAntonymsRelated WordsSynonymsLegend:
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 (the Egyptian name for the Dog Star)"
References in periodicals archive ?
92 days, the time it takes for Venus to return to the same position as seen from Earth), Forstermann determined that the red numbers--236, 90, 250, and 8--marked four significant points in the planet's cycle: its morning heliacal rising; its disappearance at superior conjunction; its first evening rise; and its disappearance at inferior conjunction.
In this heliacal observation the star is visible very briefly.
The traditional 40-day period of dog days once coincided with the heliacal (at sunrise) rising of Sirius.
In his travel guide Heraclides Criticus gave the description of a ritual that had taken place on Mount Pelion in Thessaly, Greece, where Chiron had lived, and which was performed at the heliacal rising of Sirius.
Since the time interval between two heliacal risings of Sirius, or Sothic year, was about 365 days they added 5 intercalary epagomenal days corresponding to the birthdays of the deities Osiris, Isis, Horus, Seth and Nephthys.
Brophy further suggests that other stones indicate an alignment with the heliacal rising of specific stars at the vernal equinox, events which occur once every 25,900 years.
They look at Egyptian chronological tradition and method of dating, relative chronology such as dynasties, and absolute chronology such as dendrology and the heliacal rising of Sirius.
92) Another function was to appease deities in dangerous situations such as a heliacal rising of Venus or an eclipse.
In its simplest form, Molnar's theory identifies the star of Bethlehem as the planet Jupiter in its heliacal rise.
A RE-EXAMINATION OF HELIACAL RISE AND SET PHENOMENA FOR BRIGHT STARS IN THE MAYAN SKY Shabnam Kaderi, The University of Memphis, Memphis, Tennessee.
To forestall this, the holidays--or "feasts" as they seem to have been called--were regulated by the Moon, usually dating the first of each month by the first invisibility of the old lunar crescent just before sunrise, as well as the heliacal rising of Sirius in midsummer.