What is secular resonance?

Why Narvi’s orbit sometimes locks into step with Saturn.

Published 2026-10-23

Narvi’s orbit can temporarily fall into secular resonance with Saturn.^[1]

Slow wobbles

Distant moons’ orbits slowly twist and turn under the Sun’s pull. A secular resonance happens when those slow motions line up with another body’s.

A stretched orbit

Narvi’s mean eccentricity is about 0.44, one of the higher values among Saturn’s moons.^[3]

Retrograde

Its inclination of about 142° makes it retrograde.^[3]

Numbered citations link to the sources list on the Narvi overview page.