Dictionary term
Right Ascension Hour
Direct answer
Right Ascension Hour: A Right Ascension Hour is 15 angular degrees along the celestial equator, with 24 hours spanning a full circle.
One right-ascension hour equals 15 degrees.
One right-ascension hour equals 15 degrees.
A scientific orientation to scale, light, or motion; the article supplies the precise definition.Quick reference
- Use when
- Read right ascension as angular time, not elapsed civil time.
- Do not use it for
- Minutes and seconds of right ascension are angular subdivisions, not ordinary clock durations.
- Reference category
- Astronomy & Skywatching
- Related terms
- Ecliptic Coordinate System, Galactic Coordinate System, Declination Circle, Celestial Meridian
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The story behind Right Ascension Hour
Hour notation became practical for star catalogues and transit observations.
Right Ascension Hour: fact and faith, kept distinct
This is a factual astronomy reference. It can support wonder at the created order without becoming a claim of fate, worship, or private revelation.
Right Ascension Hour in numerology
Right Ascension Hour is not a numerology claim. Any numbers attached to it should retain their ordinary scientific, calendrical, navigational, or historical meaning unless a separate symbolic interpretation is clearly labeled.
Why Right Ascension Hour matters
It connects the celestial grid with Earth’s daily rotation and sidereal time.
Right Ascension Hour at work: an example
Six hours of right ascension corresponds to 90 degrees around the equator.
Where interpretation stops
Right Ascension Hour is presented as sourced astronomy, calendrical, Earth-science, cultural, or instrument-history reference. Definitions should distinguish measured phenomena from civil convention and historical interpretation, preserve location and time dependencies, and avoid turning factual sky data into a deterministic personal claim.
Sources and editorial method
Research references used for this entry include:
- U.S. Naval Observatory: Astronomical Almanac Glossary - Definitions for astronomical coordinates, time, reference systems, and observable phenomena.
- International Astronomical Union: Standards of Fundamental Astronomy - IAU-maintained standards and algorithms for astronomical reference systems and coordinate transformations.
- Source
- The Great Almanac Dictionary
- Category
- Astronomy & Skywatching
- Also appears in
- Astronomy & Skywatching
- Aliases
- None listed
- Last updated
- 2026-07-16
Convert sky hours into degrees
Right Ascension Hour in a book is one thing; Right Ascension Hour in your own birth chart is your life. The Oracle casts your real chart and tells you what it means for your love, your work, and your year ahead, in conversation, free.
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More in Astronomy & Skywatching
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Common questions
What is Right Ascension Hour?
A Right Ascension Hour is 15 angular degrees along the celestial equator, with 24 hours spanning a full circle.
How is Right Ascension Hour used in an almanac?
Read right ascension as angular time, not elapsed civil time.
What should I avoid when interpreting Right Ascension Hour?
Minutes and seconds of right ascension are angular subdivisions, not ordinary clock durations.
