Dictionary term
Orbital Inclination
Direct answer
Orbital Inclination is the angle between an orbit’s plane and a stated reference plane.
It measures how strongly an orbital plane is tilted.
It measures how strongly an orbital plane is tilted.
A scientific orientation to scale, light, or motion; the article supplies the precise definition.Quick reference
- Use when
- Always name the reference plane, such as the ecliptic or a planet’s equator.
- Do not use it for
- A small inclination does not guarantee a transit for every observer.
- Reference category
- Astronomy & Skywatching
- Related terms
- Semimajor Axis, Orbital Eccentricity, Longitude of Ascending Node, Argument of Periapsis
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The story behind Orbital Inclination
Inclination became one of the classical elements used to orient an orbit in space.
Orbital Inclination: 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.
Orbital Inclination in numerology
Orbital Inclination 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 Orbital Inclination matters
It explains why bodies can pass north or south of an apparent alignment.
Orbital Inclination at work: an example
The Moon’s inclined orbit is why eclipses do not occur every month.
Where interpretation stops
Orbital Inclination 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:
- NASA Science: Orbits and Kepler’s Laws - NASA explanation of orbital ellipses, orbital periods, and Kepler’s laws of planetary motion.
- U.S. Naval Observatory: Astronomical Almanac Glossary - Definitions for astronomical coordinates, time, reference systems, and observable phenomena.
- Source
- The Great Almanac Dictionary
- Category
- Astronomy & Skywatching
- Also appears in
- Astronomy & Skywatching
- Aliases
- None listed
- Last updated
- 2026-07-16
Visualize an orbital plane’s tilt
Orbital Inclination in a book is one thing; Orbital Inclination 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.
Speak with the OracleRelated terms
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Common questions
What is Orbital Inclination?
Orbital Inclination is the angle between an orbit’s plane and a stated reference plane.
How is Orbital Inclination used in an almanac?
Always name the reference plane, such as the ecliptic or a planet’s equator.
What should I avoid when interpreting Orbital Inclination?
A small inclination does not guarantee a transit for every observer.
