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heliacal

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heliacal
heliacal, a. (hɪˈlaɪəkəl) [f. as prec. + -al1.] 1. Astron. Said of the rising of a star when it first emerges from the sun's rays and becomes visible before sunrise, or of its setting when it is last visible after sunset before being lost in the sun's rays.1607 A. Brewer Lingua iii. vi, Setting of s... Oxford English Dictionary
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Heliacal rising
The same star will reappear in the eastern sky at dawn approximately one year after its previous heliacal rising. When a planet has a heliacal rising, there is a conjunction with the sun beforehand. wikipedia.org
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heliac
heliac, a. (ˈhiːlɪæk) [ad. late L. hēliac-us, a. Gr. ἡλιακός, f. ἥλιος the sun. Cf. F. héliaque.] 1. Pertaining to the sun, solar.1808 J. Barlow Columb. ii. 431 Quito bow'd; and all the heliac zone Felt the same sceptre, and confirm'd the throne. 2. = heliacal 1.1775 Ash, Heliac, emerging from the l... Oxford English Dictionary
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Apaosha
A mythological explanation of the heliacal setting of Sirius is only alluded to in the Avesta: In Yasht 18.5-6, Apaosha is contrasted with the bringers Notes The heliacal rising of Sirius presently occurs in early August. But 2500 years ago, it occurred about two weeks earlier. wikipedia.org
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-acal
-acal compound suffix; consisting of -al1 repr. L. -ālis, -āle ‘of the nature of, belonging to,’ added to -ac (q.v.), which although strictly an adj. ending was so often used substantively, e.g. demoniac, maniac, ammoniac, aphrodisiac, that it became usual to make the adj. in -acal even when no n. o... Oxford English Dictionary
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Decan
Later developments These predictable heliacal re-appearances by the decans were eventually used by the Egyptians to mark the divisions of their annual Thus the heliacal rising of Sirius marked the annual flooding of the Nile. wikipedia.org
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acronycal
acronychal, acronycal, a. (əˈkrɒnɪkəl) Also acronical, achronical, achronycal, acronichal. [f. prec. + -al1. Incorrectly spelt achronical, as if derived from χρόνος time; and with many intermediate forms.] Happening in the evening or at night-fall, vespertine, as the acronychal rising or setting of ... Oxford English Dictionary
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Harkhebi
Harkhebi predicted the weather patterns of the heliacal risings of the fixed stars. wikipedia.org
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Golyam Bogdan
In the area, the rare and endangered Aquila Heliacal, the Eastern Imperial Eagle, can be seen. wikipedia.org
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sunly
sunly, a. rare. (ˈsʌnlɪ) [f. as prec. + -ly1.] † a. = heliacal 1. Obs. b. Pertaining or relating to the sun, solar.1551 Recorde Cast. Knowl. (1556) 274 When Venus doth shyne at euenynge after sonne settinge, she doth rise, as som tearme it, with a sonnely rysinge. 1873 L. Wallace Fair God ii. xi. 15... Oxford English Dictionary
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Venus tablet of Ammisaduqa
The tablet gives the rise times of Venus and its first and last visibility on the horizon before or after sunrise and sunset (the heliacal risings and Also, the tables used to calculate the heliacal rising of Venus assume a rate at which the earth is slowing, a rate which is not certain, causing "clock-time wikipedia.org
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dog-days
dog-days, n. pl. [tr. L. dies caniculares: see canicular.] 1. The days about the time of the heliacal rising of the Dog-star; noted from ancient times as the hottest and most unwholesome period of the year. They have been variously calculated, as depending on the greater dog-star (Sirius) or the les... Oxford English Dictionary
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MUL.APIN
The astrophysicist Bradley Schaefer and the astronomer Teije de Jong computed that the dates of the heliacal risings and settings in these tablets fit In MUL.APIN, almost all cases of heliacal phenomena refer to constellations and not to single stars. wikipedia.org
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Sothic cycle
A heliacal rise of Sirius was recorded by Censorinus as having happened on the Egyptian New Year's Day between 139 CE and 142 CE. The second observation is clearly a reference to a heliacal rising, and is believed to date to the seventh year of Senusret III. wikipedia.org
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Seasonal year
For example, the ancient Egyptians used the heliacal rising of Sirius to predict the flooding of the Nile. wikipedia.org
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