Quick answer: The quincunx (or inconjunct) is a minor 150-degree aspect, exactly five-twelfths of the zodiac. It is not one of the five Ptolemaic aspects; classically the two signs sit in "aversion," sharing no element, modality, or polarity. Modern astrology calls it the aspect of adjustment: two placements that neither blend nor clash.
Few configurations puzzle newcomers like the quincunx. It joins two placements that have almost nothing in common, and both the classical and modern traditions build their reading on that very absence of shared ground.
What the quincunx actually is: 150 degrees and "five-twelfths"
A quincunx measures 150 degrees between two points, which is five-twelfths of the 360-degree circle. Its name comes from Latin quinque ("five") and uncia ("a twelfth part"), literally five-twelfths. That places it outside the classical scheme: Ptolemy's Tetrabiblos (2nd century) recognizes only five aspects, the conjunction (0), sextile (60), square (90), trine (120), and opposition (180). One hundred fifty degrees is deliberately absent from that list, so the quincunx counts as a minor aspect. The wider set of minor, harmonic angles beyond those five is associated with Kepler's Harmonices Mundi (1619). For a fuller map, see our aspects overview.
Aversion: the signs that do not behold each other
In traditional astrology the five aspects were "beholdings," the ways two signs can see one another across the wheel. Signs 150 degrees apart form none of them, so they are said to be "in aversion" or "disjunct": turned away, unable to witness each other. The old Latin word inconjunct originally covered both the 30-degree and the 150-degree relationship, which is why the terminology still causes confusion. A planet can even sit in aversion to a sign it rules, muffling its expression, a nuance that connects to planetary dignities.
No common ground: element, modality, and polarity
What makes the quincunx distinctive is measurable. The two signs share no element, no modality, and no polarity, the only aspect besides the semisextile with nothing in common. Aries (fire, cardinal, positive) is quincunx both Virgo (earth, mutable, negative) and Scorpio (water, fixed, negative). The table below shows each aspect's "fingerprint."
| Aspect | Angle | Signs apart | Element | Modality | Polarity | Classical status | |---|---|---|---|---|---|---| | Conjunction | 0° | 0 (same sign) | same | same | same | Ptolemaic (co-presence) | | Semisextile | 30° | 1 | different | different | opposite | minor (aversion) | | Sextile | 60° | 2 | compatible | different | same | Ptolemaic | | Square | 90° | 3 | different | same | opposite | Ptolemaic | | Trine | 120° | 4 | same | different | same | Ptolemaic | | Quincunx | 150° | 5 | different | different | opposite | minor (aversion) | | Opposition | 180° | 6 | complementary | same | same | Ptolemaic |
Because the parts genuinely differ, they can neither merge easily, as a trine does, nor clash cleanly, as a square does. (modern) The theme of constant small recalibration, and the label "aspect of adjustment," are 20th-century readings rather than classical doctrine.
The health association: the 6th and 8th signs
The old link between 150 degrees and the body has a concrete root. Counting from any sign, the two signs a quincunx away are its 6th and 8th signs: from Aries, that is Virgo (the 6th) and Scorpio (the 8th). In the house scheme the 6th governs illness and labor and the 8th governs death, the two places the life-giving ascendant "cannot see." Mars taking its planetary joy in the 6th deepened the association. This is symbolic resonance, an explanation of why the tradition tied the angle to the body, not a medical claim; a quincunx describes a structure, not an outcome.
The Yod: the quincunx's "Finger of God"
The quincunx is the building block of a striking pattern. (modern) A Yod, nicknamed the "Finger of God" or "Finger of Fate," forms when two planets in sextile (60) are both quincunx (150) to a third apex planet: 60 plus 150 plus 150 completes the 360-degree circle. The apex becomes a focal point that must reconcile two placements it cannot easily reach. You can read more in our guide to aspect patterns.
Working with the quincunx today
Orbs for the quincunx are tight and not standardized; many astrologers allow about 2 to 3 degrees, some as little as 1.5, always narrower than the orbs given to the major aspects. Read it descriptively: a quincunx marks two parts of a chart that operate on incompatible terms and so invite ongoing minor adjustment. Many people experience it as a recurring sense of not quite fitting that asks for accommodation rather than resolution. Even the aspect's validity and its orb are matters of interpretive convention, a good reminder that this language describes tendency and theme, never fixed fate.
Frequently Asked Questions
Is the quincunx a major or minor aspect?
A minor aspect. The five major, or Ptolemaic, aspects are the conjunction, sextile, square, trine, and opposition. The quincunx at 150 degrees is not among them, so it is read as a secondary angle with a tight orb.
What is the difference between a quincunx and an inconjunct?
Today they usually mean the same 150-degree aspect. Historically "inconjunct" was broader, covering both the 30-degree semisextile and the 150-degree quincunx, since both are aversions. Modern usage narrowed it to point mainly at the quincunx.
What orb should you use for a quincunx?
There is no fixed standard. A common choice is about 2 to 3 degrees, and some astrologers keep it as tight as 1.5. Being minor, its orb stays narrower than those you would allow for a trine or square.
Does a quincunx to the 6th or 8th house mean health problems?
No. The tradition connected 150 degrees to the 6th and 8th signs, houses of illness and death, which is why the health theme exists. That is a symbolic explanation, not a diagnosis or prediction; the aspect describes a felt tension, not a guaranteed event.
See the quincunxes in your own chart
Curious where these 150-degree tensions fall for you? Cast a free natal chart to spot every quincunx and Yod, explore the patterns in depth with a personality report, or keep reading on the blog.
