Saros cycle

Alternative definitions (0), class: vernacular (0)
Term: Saros cycle

The period of 223 synodic month, equaling 6585.32 days or 18 years, 11.33 days, after which the Sun, Earth, and Moon return to approximately the same relative geometry. When two eclipses are separated by a period of one Saros, they occur at the same node with the Moon at nearly the same distance from Earth and at the same time of year. Thus, the Saros is a useful tool for organizing eclipses into families or series. Each series typically lasts 12 or 13 centuries and contains 70 or more eclipses.

Created 2023.04.16
Last Modified 2023.04.16
Contributed by Ryan McGranaghan