Aspects
Semi-Sextile
Direct answer
Semi-Sextile is a 30-degree aspect between neighboring signs, showing a small but meaningful adjustment between adjacent life areas.
$0 today, then $12/month after 7 days. Cancel anytime.
At a glance
- In astrology
- The semi-sextile is a minor aspect and half of a sextile, often interpreted with tighter orbs than major aspects.
- Found in
- Aspects
- Related
- Birth Chart, Zodiac, Transit
A Semi-Sextile is a subtle 30-degree aspect between neighboring signs.
A structural orientation; exact placements depend on the chart or technique being discussed.
What does your own chart say about you?
Choose love, work or purpose. Your reading is written from your chart. Your reading uses your own birth details.
Walk through Alex’s whole example first
The Road of AgesSee the turning points of your whole life, from your birth date
See your road's shape
Prefer to explore first?
The Road of AgesThe turning points of your whole life, from your own chart
Walk my road
Free, by email
Your daily Almanac letter
One short letter at 7 each morning: the day’s theme read for your own chart, and one thing to do with it.
What sets Semi-Sextile apart
The semi-sextile is 30 degrees, exactly one sign wide, and its distinction is that it joins signs the older tradition says cannot see each other. Neighbouring signs share no element, no modality and no gender, which is why Ptolemy leaves the angle out of his five aspects and why whole-sign astrologers call such pairs averse. Its use in charts comes from the later minor aspects, and an orb of only about 1 to 2 degrees is common.
- Angle: 30 degrees, one twelfth of the circle
- Harmonic: the twelfth harmonic; it is half a sextile of 60 degrees
- Orb: about 1 to 2 degrees in common modern practice
- Ptolemaic status: not among the five Ptolemaic aspects
- Sign relation: adjacent signs differ in element, modality and polarity
Often mistaken for something else: The quincunx is 150 degrees and also joins signs that do not see each other; the semi-sextile is the 30 degree neighbour.
A one-minute story
The Book of the Sky
How people learned to read the sky, from Babylon to the day you were born.
The story behind Semi-Sextile
Minor aspect practice grew as astrologers explored divisions of the zodiac beyond the five Ptolemaic aspects.
The spiritual meaning of Semi-Sextile
Spiritually, Semi-Sextile asks what small adjustment would make the next step cleaner.
Why Semi-Sextile matters
Semi-Sextile matters because adjacent signs can sit beside each other while operating by very different instincts.
Semi-Sextile in practice: an example
Sun semi-sextile Mercury can sharpen awareness of how identity and speech sit close together but still need tuning.
Where readings of Semi-Sextile go wrong
It is a mistake to make a semi-sextile carry the weight of a conjunction or square unless it is exact and strongly reinforced.
Sources and editorial method
This entry summarizes the tradition in the Almanac's own words; where no source is listed, it is an editorial summary rather than a primary text, and symbolic readings are named as the tradition's, not as fact.
- Source
- The Great Almanac Dictionary
- Category
- Aspects
- Last updated
- 2026-09-26
Tune your subtle aspects
Semi-Sextile in a book is one thing; Semi-Sextile 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. It opens with the 7-day Seeker trial.
Speak with the OracleHow Semi-Sextile lives in your own chart across your year, in love, in work, in timing, is written in the Cosmic Codex: the whole year, once. Open the Cosmic Codex
Related terms
More in Aspects
- Seventh Harmonic
- Trine
- Applying Orb
- Bi-Septile
- Exact Aspect
- Kepler Aspects
- Novile Aspect
- Platic Aspect
From the reference page to your own chart
Every word here
is in your own chart.
- A personal reading about love, work or purpose, written from your chart
- A practical next step to consider
- It opens with 7 days free, with the AI Oracle and daily guidance
$0 today, then $12/month after 7 days. Cancel anytime.
Common questions
What is Semi-Sextile?
Semi-Sextile is a 30-degree aspect between neighboring signs, showing a small but meaningful adjustment between adjacent life areas.
Where does Semi-Sextile come from?
Minor aspect practice grew as astrologers explored divisions of the zodiac beyond the five Ptolemaic aspects.
What does Semi-Sextile mean in astrology?
The semi-sextile is a minor aspect and half of a sextile, often interpreted with tighter orbs than major aspects.
What does Semi-Sextile look like in a birth chart?
Sun semi-sextile Mercury can sharpen awareness of how identity and speech sit close together but still need tuning.
What does Semi-Sextile mean spiritually?
Spiritually, Semi-Sextile asks what small adjustment would make the next step cleaner.
Free, by email
The Almanac, in your inbox at 7
One short letter at 7 each morning: the day’s theme read for your own chart, and one thing to do with it.
