Babylon teaching
One sky, one timestamp
Every position in a daily reading must describe the same instant.
Understand the idea
Record date, time, time zone, tropical zodiac, geocentric ecliptic longitude, ephemeris provider, precision, and node convention. Mixing a New Moon snapshot with positions from later in the day makes the calculation inconsistent. A published calculation should make its inputs reproducible.
An example to work with
Write the UTC instant and source once, then obtain every required body at that instant.
A QUESTION TO CARRY
Could another reader reproduce your inputs?
Part of Babylon’s authored teaching framework. Symbolic correspondences offer a language for reflection and learning.