Ars Astro

The instruments.

Tools for the practice of Jyotish: for casting charts, reading the day, finding the right hour, and tracing the cycles of life.

A note on calibration

Every tool here uses the Lahiri (Chitrapaksha) ayanamsa with the sidereal zodiac and whole-sign houses, anchored to the Swiss Ephemeris. The panchanga is sunrise-anchored: pre-dawn moments belong to the previous Vedic day. See how this site calculates for the classical sources behind these conventions.