Roche limit !

This is what I studied.

Roche limit The distance that the satellite can approach without breaking the mechanism of the parent planet.

A weaker satellite, such as a comet, could be broken up when it passes within its Roche limit.

A ring is formed by the velocity of moving particles.

The satellite maintains its sphere outside Roche's limits.
When the satellite reaches the Roche limit, its shape changes because of the tidal of the planet.
Roche limit
The limiting distance to which a satellite can approach without breaking up depends on the rigidity of the satellite.

where is the radius of the secondary, is the density of the primary, and is the density of the satellite.
For the example) The Moon is at the limit of Roche's orbit, creating a shift in the tide.

Thank u for reading.
reference-https://en.wikipedia.org/wiki/Roche_limit