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Capricorn and Aquarius: sign compatibility

Capricorn and Aquarius are neighbours in the zodiac, one sign apart: a semisextile, 30°.

What the two signs have in common

Facts about the two signs as traditional astrology lists them. The reading below is built from these rows.

FactCapricornAquarius
Aspect between the signsSemisextile, 30°
ElementEarthAir
Quality the elements shareNone
ModalityCardinalFixed
Traditional rulerSaturnSaturn
Modern rulerSaturnUranus
How the rulers relateOne planet rules both
This page lists the facts about the pair and what the tradition reads from them. It gives no score: every pair of people born under these two signs would get the same number, and that number would say nothing about them.

The aspect between the signs

Neighbouring signs share no element and no modality, and the traditional scheme counts them as “in aversion”, signs that cannot see each other. Each begins roughly where the other has just finished, which can be productive and can feel like talking past one another.

Elements and modalities

Earth is cold and dry, air hot and moist, so they share nothing. Earth tests what air proposes, and air lifts what earth has fixed in place.

One sign starts and the other sustains: a cardinal sign opens, a fixed sign holds.

The rulers

Saturn rules both Capricorn and Aquarius. The planet is the same and is expressed through two different temperaments, so the shared drive can look unlike itself from the outside.

Saturn stands for: structure, limit, duty, time.

Modern astrology also assigns Uranus to Aquarius. The reading here uses the traditional rulers; the modern ones are in the table.

The two signs together

Capricorn tends to bring discipline: reliability, long-term planning and quiet commitment. It tends to need respect for its effort, and permission to rest.

Aquarius tends to bring independence: ideas, fairness toward everyone and an unusual angle. It tends to need space, and to be accepted without being asked to conform.

Both are ruled by Saturn and take structure seriously. Capricorn builds within institutions and Aquarius questions them, so the difference is whether rules are kept or rewritten.

What tends to come easily

  • Each brings something the other has not yet developed.
  • Practical strength and conceptual strength complement each other.
  • Starting and keeping are both covered.
  • A common drive sits underneath the different styles.

What tends to cost something

  • There is little automatic understanding; common ground has to be built.
  • Earth hears talk without results, and air hears caution as dullness.
  • The starter can feel held back, and the sustainer can feel pushed.
  • The same need is expressed differently, and each can read the other’s version as a failing.

What two Sun signs cannot say

Two Sun signs are a small part of two charts. The Moon, Venus, Mars, the rising sign and the houses of each person shape how a relationship goes, and so do age, circumstance and choice.

The aspect here is counted between signs, not between degrees. Two people born at the start and at the end of the same sign stand differently from two born at the same degree, and this page cannot tell which applies.

Two signs are not two charts

To compare two actual people, the synastry tool takes both birth dates and shows the aspects between the planets.