Astro*Dictionary by Michael Erlewine
2 articles for "Acronical / Acronycal"
Acronical, or Acronychal, or Acronycal [Astro*Index][Ancient Greek. ἄκρονυξ akronychos, at night's edge (sunset)]
An acronical planet is opposite the Sun; in that position, it will rise after sunset and set before the following sunrise. The planet is in a favorable position for astronomical observation.
See also:Acronycal [DeVore]
♦ Heliacal Rising/setting
(a-kron'i-kal)
(Gr., on the edge of the night.)
Said of the rising after sunset, or the setting before sunrise, of a planet that is in opposition to the Sun, hence in a favorable position for astronomical observation. A. Place. The degree it will occupy when it is in opposition to the Sun.
See also:
♦ Heliacal Rising/setting
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