September 2025 lunar eclipse

Saros series

Lunar saros series 128, repeating every 18 years and 11 days, has a total of 71 lunar eclipse events including 11 total lunar eclipses.

Metonic cycle (19 years)

This eclipse is the second of four Metonic cycle lunar eclipses on the same date, September 7, each separated by 19 years:

The Metonic cycle repeats nearly exactly every 19 years and represents a Saros cycle plus one lunar year. Because it occurs on the same calendar date, the earth's shadow will in nearly the same location relative to the background stars.