Dictionary term
Local Sidereal Time
Direct answer
Local Sidereal Time is sidereal time adjusted for an observer's longitude, indicating the right ascension on the local meridian.
Local Sidereal Time tells which right ascension is crossing a site's meridian.
- Source
- The Great Almanac Dictionary
- Category
- Calendars & Timekeeping
- Also appears in
- Calendars & Timekeeping
- Aliases
- None listed
- Last updated
- 2026-07-16
Quick reference
- Use when
- Use Local Sidereal Time for telescope alignment, hour-angle calculation, and planning when an object culminates.
- Do not use it for
- Use the correct longitude sign and distinguish local sidereal time from local civil time.
- Reference category
- Calendars & Timekeeping
- Related terms
- Greenwich Sidereal Time, Dynamical Time, Calendar, Julian Date
The story behind Local Sidereal Time
Local sidereal clocks were standard observatory instruments before computerized mount control.
Local Sidereal Time in spiritual tradition
Spiritually, local sidereal time can cultivate place-based sky awareness without implying stellar control.
The Great Almanac frames Local Sidereal Time with educational restraint. Mystical or symbolic language may be meaningful, but it should not be exaggerated into certainty, panic, or permission to ignore ordinary responsibility.
Local Sidereal Time in the Bible
This is a factual calendar, astronomy, Earth-science, cultural-history, or observational reference. It can support wonder and practical planning without becoming a claim of fate, spiritual causation, or private revelation.
Local Sidereal Time in numerology
Local Sidereal Time 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 Local Sidereal Time matters
It connects a celestial catalog to the sky currently overhead at a particular observing location.
Example in a reading: An object culminates near the moment its right ascension equals the observer Local Sidereal Time.
Interpretive caution: Use the correct longitude sign and distinguish local sidereal time from local civil time.
How Local Sidereal Time is used in a reading
Use Local Sidereal Time for telescope alignment, hour-angle calculation, and planning when an object culminates.
Where interpretation stops
Local Sidereal Time 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 Circular 179: The IAU Resolutions on Astronomical Reference Systems, Time Scales, and Earth Rotation Models - Technical reference for TAI, TT, TCG, TCB, TDB, UT1, sidereal time, epochs, and Earth rotation.
- IAU SOFA: Time Scale and Calendar Tools - IAU-standard algorithms and guidance for civil calendars, Julian dates, and seven recognized astronomical time scales.
The page starts with a direct definition, then separates use, example, caution, spiritual meaning, and historical context. For astrology, occult, demonology, curse, and spiritual warfare terms, the editorial rule is to explain the term without making fear-based, fatalistic, medical, legal, financial, or ritual-instruction claims.
Continue learning
Place this timekeeping idea beside the current sky, universal timing, and live celestial positions.
Open Worldwide WatchRelated terms
These related entries help place Local Sidereal Time inside a wider reference cluster instead of leaving it as a standalone keyword.
