Longitude and latitude measured along and from the ecliptic.
Definition
Ecliptic longitude λ is measured eastward along the ecliptic from the vernal equinox (0°–360°). Ecliptic latitude β is measured perpendicular to the ecliptic, positive northward. Planetary orbits have small β because the system is nearly coplanar.
3D illustration
Ecliptic longitude and latitude in the heliocentric frame.
Use the menu and time controls to explore. Based on Jean Meeus' Astronomical Algorithms.
