Every planet has a mirror. Enter your birth details to see your antiscia and contra-antiscia — the solstice and equinox reflections — and the hidden contacts they make in your chart.
Antiscia are one of the oldest techniques in Western astrology and one of the least visible in modern software. The idea is simple: the solstice axis — 0° Cancer to 0° Capricorn — acts like a mirror. Two degrees that reflect onto each other across that axis share the same length of day, and the ancients treated them as being in sympathy. A planet standing on another planet's antiscion is read as a hidden conjunction: a connection that is genuinely there but does not appear anywhere in the chart wheel.
Antiscia mirror across the solstice axis (Cancer–Capricorn). Cancer reflects to Gemini, Leo to Taurus, Virgo to Aries, Libra to Pisces, and so on. These contacts behave like a quiet conjunction — a blending, a shared thread.
Contra-antiscia mirror across the equinox axis (Aries–Libra) instead. They behave closer to a hidden opposition: a tension or a pull between two parts of the chart that appear unrelated at first glance.
If you have ever looked at a chart and felt certain that two planets were speaking to each other without finding an aspect between them, antiscia are the usual explanation. They are especially valued in Hellenistic and traditional practice, and remain a standard tool for astrologers working with rectification or with charts that look strangely quiet in longitude.
Your birth data goes to the Caldera ephemeris engine, which computes each body's longitude, reflects it across both axes, and then checks every mirror point against every other body to find contacts within a tight orb. Nothing is stored.
An antiscion is a planet's mirror point reflected across the solstice axis, 0° Cancer to 0° Capricorn. Two degrees that share the same day length are antiscia to each other, and a planet sitting on another planet's antiscion is read as a hidden conjunction.
Antiscia mirror across the solstice axis (Cancer–Capricorn) and behave like a hidden conjunction. Contra-antiscia mirror across the equinox axis (Aries–Libra) and behave more like a hidden opposition.
Subtract the planet's zodiacal longitude from 90°, wrapping around the circle when needed. In practice the reflection pairs Cancer with Gemini, Leo with Taurus, Virgo with Aries, Libra with Pisces, Scorpio with Aquarius, and Sagittarius with Capricorn.
Traditional practice keeps antiscia orbs tight — often one degree or less, since the technique is about precise reflection rather than general influence. This calculator reports the exact orb so you can apply your own standard.
