Free Overcoming Aspects Calculator

In Hellenistic astrology, a planet overcomes another when it sits in the superior position by the 10th-sign rule. The Greek word is kathuperteresis(καθυπερτέρησις), literally "holding the upper ground." The overcoming planet sets the conditions of the contact. The planet being overcome operates on the superior's terms.

Modern aspect lists treat squares as mutual: two planets, equal weight, same friction in both directions. Hellenistic astrologers read squares as directional, and the asymmetry mattered. The planet that was overcoming the other set the tone of the configuration. That is the read this calculator gives you.

The strongest version of overcoming has its own name: epidekateia, sometimes spelled epidekatasis. It translates as "being upon the tenth," and it describes the case where the superior planet sits exactly ten signs ahead of the inferior planet in zodiacal order. Counting inclusively, in the Hellenistic convention: Aries is one, Taurus is two, and so on, so a planet in Aries is upon the tenth of a planet in Cancer.

Why ten? The 10th place is the place of authority in the standard whole-sign house topology. It is the sign that culminates above the rising sign, the seat of profession, public role, command. When one planet is geometrically ten signs from another, the doctrine reads it as if that planet had been transplanted to the other's 10th house. It now sits in a position of rulership over the second planet, regardless of where either of them actually falls in the chart.

Every superior square is, by geometry, an epidekateia from the inferior planet's vantage. The calculator flags this explicitly so you can find the loaded squares in your chart at a glance.

Not every overcoming relationship carries equal force. The literature consistently ranks them.

Oppositions are mutual by every Hellenistic source. There is no superior planet across a 180-degree axis. The calculator labels oppositions but does not assign overcoming to them.

The aspect type tells you how loud the configuration is. The benefic/malefic mix tells you how kind or harsh the verdict reads. Combine the two and you have the working interpretation.

Benefic over malefic. Jupiter or Venus in the superior position over Mars or Saturn. The configuration where overcoming acts as rehabilitation. The benefic doesn't erase the malefic's bite, but it sets the conditions under which the malefic operates. Expect challenge tempered by relief.

Malefic over benefic. Mars or Saturn in the superior position over Jupiter or Venus. The harshest case. The benefic's gifts arrive, but they arrive on the malefic's terms. Pleasures get gated by labor (Saturn over Venus), or generosity gets distorted into conflict (Mars over Jupiter). Valens treats this configuration as one of the more loaded indicators in his outcome material.

Benefic over benefic. Jupiter over Venus, or Venus over Jupiter. The friendliest configuration the doctrine produces. The two natures harmonize and overcoming functions as gentle direction.

Malefic over malefic. Saturn over Mars, or Mars over Saturn. Compounded difficulty. Sect determines whether the configuration is ruinous or simply strenuous. The contrary-to-sect malefic in the superior position is the configuration to watch.

Sect is the day/night distinction in Hellenistic astrology, and it changes how every overcoming relationship reads. The short version: the malefic of your sect (Saturn for day charts, Mars for night charts) is somewhat tamed by being in-sect. The malefic contrary to your sect (Mars by day, Saturn by night) is at its worst.

Apply this to overcoming as a single rule: when the overcoming planet is contrary to sect, the configuration is amplified in its negative tendencies. When the overcoming planet is in-sect, the configuration is muted. A day chart with Mars in superior square to Venus is significantly louder than the same geometric configuration in a night chart, because day-Mars is the most volatile placement Mars makes.

The calculator surfaces this as the sect badge on every row. Treat it as a multiplier on the row's read, not a separate finding. Benefics are not modulated by sect in this calculator; sect's loudest claim in the doctrine is on malefics.

Skim for your chart's actual overcoming pairs, read those rows, then come back for context. The Provenance column flags pairs whose outcome language is widely attested in the Hellenistic corpus (chiefly Valens's Anthology and Dorotheus's Carmen Astrologicum) versus rows synthesized from the planets' natures and sect status. The traditional sources do not give equal coverage to every pair; the gaps are filled with modern reads grounded in the same nature-and-sect logic, not invented attributions.

The table is partial by design. It covers the pairs the doctrine speaks to most consistently. If your chart has an overcoming pair not listed (Mercury over Saturn, Moon over Mars, and so on), the calculator above will still surface it; the row's read will gloss the configuration using the same nature-and-sect logic.

There are three Greek terms in this neighborhood and they are not synonyms. Confusing them is the most common error in modern Hellenistic writeups.

Kathuperteresis is a state. It names the relationship: planet A is in superior position to planet B. When you say "Saturn is in kathuperteresis to Venus," you are describing a configuration that exists in the chart.

Aktinoboleō is a verb. It means "to cast a ray" or "to strike with a ray." When you say "Saturn aktinobolei Venus," you are describing what Saturn is doing. The action verb maps onto the geometric act of light traveling across the figure of the aspect.

Epidekateia is a special case. It describes the configuration where the superior planet sits exactly upon the tenth from the inferior planet. Every epidekateia is a kathuperteresis, but not every kathuperteresis is an epidekateia.

Robert Schmidt's Definitions and Foundationsdraws these distinctions carefully. Chris Brennan's Hellenistic Astrology covers the doctrine in its larger chapter on aspect doctrine and is the most accessible starting point.

Overcoming is one factor among many in a Hellenistic chart read. It is not a verdict, and it cannot stand alone.

Reception. Whether the overcome planet sits in territory ruled by the overcoming planet changes the read substantially. A Mars overcoming Venus from Aries is harsh; a Mars overcoming Venus from a sign Venus rules is mitigated by Venus's own dignity in that location. The calculator does not yet model reception.

Dignity. A debilitated overcoming planet still overcomes, but its capacity to actually impose its conditions is diminished. Pair this tool with the essential dignities calculator to weight each row.

Adjacent doctrine. Bonification (a benefic helping a planet) and maltreatment (a malefic harming a planet) overlap with overcoming but are broader. Overcoming is one channel through which both operate, not their full definition. Treat overcoming as the geometric layer; the dignity and reception layers run alongside it.

One scope note. Aspects to chart angles (Ascendant, Midheaven, IC, Descendant) are not classified here. Angles do not have a sign-of- overcoming context that the doctrine speaks to in the same way; a planet on the 10th-house cusp is a separate (and overlapping) reading. You will see angle-conjunct planets in your birth chart but not as overcoming rows in this calculator.

The tool pulls the full aspect set from your chart and applies the whole-sign overcoming logic on top. For each square, trine, or sextile it identifies which planet sits in the superior position by counting signs forward in zodiacal order. For same-sign conjunctions it applies Ptolemy's predominator rule: lower degree wins. Oppositions are labeled mutual.

Each row carries the planet pair (superior, then inferior), the aspect type, the orb, the Greek configuration label, the sect modifier, and a one-line read drawn from the planets' natures and sect status. Epidekateia rows are flagged distinctly and sorted to the top.

Pair this with the applying vs separating aspects calculator to layer motion phase on top of overcoming, and the partile aspects calculator to find the tightest contacts. An aspect that is both partile and an epidekateia is the most loaded single signature a chart can carry.