Black Moon Lilith: Why Mean and True Disagree by a Sign
Two astrology APIs can place Black Moon Lilith a full zodiac sign apart. Here is why mean and true osculating lunar apogee diverge by up to 30 degrees, and how to return both from one call.
Astrologer & Developer Advocate
Torsten Brinkmann combines 16 years of Western astrology practice with a software engineering background, specializing in astrological calculation tools, birth chart APIs, and planetary aspect analysis. His Computer Science training shapes writing that addresses both the astronomical mathematics behind natal charts and the developer integration patterns for astrology APIs. He is currently writing a technical guide to birth chart calculation for developers.
Two astrology APIs can place Black Moon Lilith a full zodiac sign apart. Here is why mean and true osculating lunar apogee diverge by up to 30 degrees, and how to return both from one call.
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Hi, I'm Rosie, your guide to RoxyAPI's insight tools.
Ask me to read your birth chart, pull a card, or map your numbers, and I'll interpret what it means for you. Unlike most AIs, I never make the numbers up: every reading runs on real, verified calculations. Curious about the API, pricing, or docs instead? Ask me that too.