Lysithea is the twelfth moon of Jupiter; also known as Jupiter X.

 

discovery	1938, by Seth Nicholson
semimajor axis	11,741,600 km (7,297,500 mi)
diameter	36 km (22 mi)
mean density	2.6 g/cm3
escape velocity	0.022 km/s (79 km/hr, 49 mph)
orbital period	259.89 days
orbital eccentricity	0.132
orbital inclination	27.01°