Cancer and Leo sit one sign apart, a semisextile in geometry and a contrasting water and fire pairing that mixes cardinal and fixed modalities. This is luminary territory on both sides, since the Moon rules Cancer and the Sun rules Leo, so the pairing tends to read as instinct meeting self-expression rather than two versions of the same style. Across fifty sampled pairings drawn from birth years spanning several decades, the aggregate scores cluster in a moderate band, with wide spreads between the strongest and weakest charts in every category, which is the honest picture for adjacent signs. The most recurrent close contacts in the sample are a Moon to Jupiter trine and a run of Sun to Mercury and Sun to Sun semisextiles, with a Mercury to Saturn square appearing often enough to matter. The tables below carry the actual figures, and the sections that follow interpret each pattern in turn.
The sign starts define a stable geometric relationship before any individual birth chart is calculated.
| Cancer element | Water |
|---|---|
| Leo element | Fire |
| Element relation | contrasting water–fire pairing |
| Cancer modality | Cardinal |
| Leo modality | Fixed |
| Modality relation | mixed cardinal–fixed modalities |
| Sign-start angle | 30° Semisextile |
Cancer and Leo sit thirty degrees apart, the semisextile, which pairs neighbouring signs that share almost nothing structurally. Cancer is water, cardinal and lunar-ruled; Leo is fire, fixed and solar-ruled. The element contrast tends to show up as different processing speeds: water reads the room and responds to undercurrents, fire declares and holds a position. Across fifty sampled pairings this contrast does not sink the numbers so much as widen them, and the Communication category shows the broadest spread in the tables, from very low to a perfect ceiling. The modality mix works differently. Cardinal Cancer initiates and adjusts, fixed Leo sustains and resists revision, so the friction is often about who steers versus who stays the course rather than about warmth itself. The Emotional Bond and Long-term medians sit in similar middling territory, which fits a pairing where the rulers, Moon and Sun, describe complementary needs handled in incompatible styles. Worth noting from the ensemble: the most recurrent close contact is a Moon–Jupiter trine, a supportive lunar link that can soften the element gap when it appears. This is the kind of pairing where the aggregates reward looking at the full chart rather than the sun signs alone.
| Category | Median | Range (min–max) |
|---|---|---|
| Overall | 66.7 | 50.5–81.8 |
| Communication | 68.4 | 25.0–100.0 |
| Attraction | 68.8 | 50.3–98.0 |
| Emotional Bond | 63.5 | 34.8–99.5 |
| Growth | 64.2 | 38.9–87.1 |
| Long-term | 64.6 | 41.3–83.8 |
Computed across 50 sampled birth-chart pairings born 1960–2009, with birth times spread across the day. This illustrates the pairing’s tendencies, not a claim about every person with these Sun signs. A personal reading requires real birth data.
| Aspect | % of sampled pairings | Median orb |
|---|---|---|
| Moon–Jupiter Trine | 22% | 1.36° |
| Sun–Mercury SemiSextile | 22% | 1.37° |
| Sun–Sun SemiSextile | 20% | 1.58° |
| Sun–Mercury SemiSquare | 20% | 1.67° |
| Mercury–Saturn Square | 18% | 0.74° |
Across fifty sampled pairings, Attraction posts the highest median of any category, which fits the geometry: both signs are ruled by luminaries, so Moon-led Cancer and Sun-led Leo tend to notice each other quickly. The most recurrent supportive contact in the ensemble is the Moon–Jupiter trine, and it arrives at a tight median orb. When that trine shows up, Cancer's ruler gets direct Jupiter support, the kind of pattern that often reads as generosity landing where it is actually felt. The Sun–Mercury semisextile appears at a similar frequency, a small but workable link between Leo's ruler and the other chart's voice, which tends to keep conversation from stalling even across the water–fire contrast. Add the cardinal–fixed mix and you get a useful division of labour in the aggregate: one side tends to initiate, the other tends to sustain. The semisextile angle rewards deliberate translation, and these samples suggest the raw material for it recurs often.
Semisextile signs share nothing structurally, and that shows here. Cancer runs on Moon logic, tidal and self-protective, while Leo runs on Sun logic, steady and expressive, so the water–fire contrast tends to surface as mismatched pacing rather than open conflict. The mixed cardinal–fixed modalities add a familiar pattern: one initiates a shift, the other holds position, and both read the other as stubborn. Across fifty sampled pairings, Communication shows the widest spread of any category, with the lowest floor in the set, which fits the geometry. The most relevant recurrent contact is the Mercury–Saturn Square, appearing in nearly a fifth of sampled charts at a notably tight median orb, the kind of aspect that turns small critiques into cold silences when it is present. A Sun–Mercury SemiSquare recurs at a similar rate, adding low-grade friction between identity and expression. These are tendencies to watch, not verdicts, and the page tables carry the exact figures.
Treat the tables here as a base rate, not a verdict. Across fifty sampled pairings the overall scores span a wide range, so your own synastry could sit anywhere in that spread. Start by checking whether your charts carry the recurrent contacts, especially the Moon–Jupiter trine or the Mercury–Saturn square, and note how tight the orbs run. Cancer and Leo sit in semisextile, a contrasting water–fire pairing with mixed cardinal–fixed modalities, so the sign geometry describes adjacent styles rather than shared ground. Your natal Moons and Mercuries will tell you more than any median.
Use real birth data to calculate the placements, houses and aspects that belong to the relationship.