Earth’s moons

1 confirmed moon in this source snapshot.

Snapshot 2026-09-09 · 1 with mass estimates · catalog 1.0.0

Earth’s confirmed moons, sorted by mean radius with unknown radii last.
Moon	Mean radius · km	Semimajor axis · km	Period · days
Moon	Mean radius · km1,737.4 ± 0.1	Orbit axis · km384,400	Period · days27.322

Mean radii descend; missing radii follow. A dash means no value in these sources. Orbit summaries describe average shapes, and do not supply dated positions.

All parent systems · Download catalog