🪞 Antiscia Calculator

Find the solstice points & shadow degrees of your planets.

Antiscia · Contra-antiscia · Reflected sign of each planet · What it reveals

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Reflecting your planets...

⏰ For accuracy: Antiscia are reflected from your planet longitudes. Add your birth time for an accurate Moon. Without time we use noon as an estimate.
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Your Antiscia Points

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🔍 How to Use Your Antiscia

Look for any planet whose antiscion falls close to another planet's actual position — within about 1-2 degrees. That pair shares a hidden sympathetic link (antiscia) or a hidden tension (contra-antiscia) that operates beneath your chart's visible aspects, often unconsciously or under specific life circumstances.

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What Is Antiscia?

Antiscia are among the most fascinating hidden structures in astrology — mirror points reflected across the solstice axis, the line running from 0° Cancer to 0° Capricorn. Every planet has an antiscion, the degree that receives an equal amount of daylight on the opposite side of the solstice. When two planets fall on each other's antiscia, they share a secret sympathetic bond that standard aspects never reveal.

The concept comes from the symmetry of the seasons. A degree of early Gemini and a degree of late Cancer share the same day length, mirrored around the summer solstice point. Ancient astrologers recognized that points sharing this solar symmetry are subtly linked, and they built the technique of antiscia to uncover these hidden connections in a chart.

Antiscia vs Contra-Antiscia

Antiscia reflect across the solstice axis (Cancer-Capricorn) and are traditionally harmonious — they function like a hidden conjunction, a sympathetic blending of two planetary energies operating quietly behind the scenes. Contra-antiscia reflect across the equinox axis (Aries-Libra) instead, and behave more like a hidden opposition, carrying polarity and creative tension. Both expose connections invisible in the chart's surface structure.

Working With Your Antiscia

To use your antiscia, compare each planet's antiscion degree with the actual positions of your other planets. Where an antiscion lands within a degree or two of a real planet, you have found a hidden link — a relationship between those two energies that often operates unconsciously or surfaces under particular circumstances. Antiscia are a hallmark of traditional and horary astrology, prized for explaining chart dynamics that ordinary aspects leave mysterious.

Antiscia Questions Answered

Antiscia (singular: antiscion) are mirror points in a birth chart, reflected across the solstice axis — the 0 degrees Cancer to 0 degrees Capricorn line. Each planet has an antiscion: the degree that receives the same amount of daylight. Two points are in antiscia when they are equidistant from the Cancer-Capricorn axis. These hidden connections reveal subtle, often unconscious links between planets that ordinary aspects miss.

The antiscion of any point is found by reflecting it across the solstice axis. The simplest formula is: antiscion longitude = 360° − planet longitude, then normalized, which mirrors a degree of Cancer to the matching degree of Gemini, Leo to Taurus, and so on around the 0° Cancer / 0° Capricorn axis. The contra-antiscion is the point directly opposite the antiscion, reflected instead across the 0° Aries / 0° Libra equinox axis.

Antiscia are reflected across the solstice axis (Cancer-Capricorn) and are traditionally considered harmonious, like a hidden conjunction or sympathetic bond. Contra-antiscia are reflected across the equinox axis (Aries-Libra) and behave more like a hidden opposition, carrying tension or polarity. Both reveal secret connections in the chart, but antiscia tend to support while contra-antiscia tend to challenge.

When a planet falls on the antiscion of another planet, the two share a hidden sympathetic link, blending their energies in a subtle, behind-the-scenes way. Antiscia are especially valued in traditional and horary astrology for uncovering connections that explain otherwise puzzling chart dynamics. They often describe energies that operate unconsciously or that emerge under specific circumstances.

Antiscia are calculated from the precise longitudes of your planets, and the fastest-moving bodies — especially the Moon — shift significantly within a single day. An accurate birth time ensures your planetary positions, and therefore your antiscia, are correct. Without birth time we calculate using noon, which is reliable for slow planets but approximate for the Moon and Ascendant.

Antiscia are most strongly associated with traditional, Hellenistic, and horary astrology, where they have been used for centuries. While many modern astrologers focus on standard aspects, antiscia are experiencing a revival as interest in traditional techniques grows. They are a sophisticated tool that reveals a hidden layer of connection beneath the visible structure of a chart.

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