Celestial Navigation · Hour Angle — Aries
Star GHA is found in the almanac by adding the star's sidereal hour angle (SHA) to the:
- AGHA of the Sun
- BEquation of time
- CLocal hour angle
- DGHA of Aries✓ Correct
Explanation
GHA of a star = GHA Aries + SHA of the star. SHA (measured westward from Aries) is tabulated for the navigational stars; GHA Aries is given hourly with increments.
Authority: The Nautical Almanac; Bowditch (Pub. No. 9)
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