Midheaven (MC)
The Midheaven (Latin Medium Coeli, "middle of the sky," abbreviated MC) is the point of the ecliptic culminating highest above the horizon at the moment of birth. Like the Ascendant, it requires a known birth time and place.
The MC is the intersection of the ecliptic with the local meridian — the line running from the north point through the zenith to the south point. That's where celestial bodies culminate, and where the Sun stands at true noon. Because this point moves through the entire zodiac with Earth's rotation, the MC shifts by roughly one degree every four minutes: without an accurate birth time it can't be determined.
In interpretation, the MC traditionally stands for vocation, public role and life direction — the "highest point" a life's path moves toward, in contrast to the Imum Coeli (IC) at the opposite end of the axis, which stands for origin and roots. The Ascendant-Descendant and MC-IC together form the chart's axis cross.
The MC is not the zenith (the point directly overhead of the observer), nor is it necessarily "up" in every house system's chart drawing — it's a precisely defined astronomical point, not a graphic convention.
How we use this term
Leitstern calculates the Midheaven only when the birth time and location coordinates are known; without a time, it's left out of the reading.
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