Concepts

Background reference for the data types and options used across the API.

• Bodies — All supported celestial bodies (planets, asteroids, nodes)
• House Systems — All 22 house division methods
• Ayanamshas — All 47 sidereal ayanamsha systems
• Time Input — DateTime and Julian Day formats
• Credits — Credit system and pricing
• Eclipses — Solar and lunar eclipse types and contact times
• Heliacal Events — Heliacal rising/setting and visibility model
• Ingresses — Sign ingresses and longitude crossings
• Aspects — Angular relationships between bodies (types, orbs, applying/separating)
• Essential Dignities — How sign placement strengthens or weakens planets
• Relationship Charts — Synastry, composite, and Davison charts compared
• Derived Charts — Secondary progressions and draconic charts
• Planetary Returns — Solar, lunar, and planetary return charts
• Arabic Parts/Lots — The 7 Hermetic lots and day/night formula reversal
• Horary Techniques — Solar proximity, void-of-course Moon, and planetary hours