Aitne, also known as Jupiter XXXI, is a retrograde irregular satellite of Jupiter. The moon was discovered in 2002.
Although it was discovered in 2002, the moon was named in 2003.
- Diameter (km): 3
- Mass: 0.004 5
- Semi-major axis (km): 22,285,161
- Inclination: 165.562°
- Orbital eccentricity: 0.3927
- Discovered: 2002
- Planet: Jupiter