Simplify the following text for a Grade 8 native English-speaking person.
Original: Mneme belongs to the Ananke group , retrograde non-spherical moons which orbit Jupiter between 19,300,000 and 22,700,000 km , at inclinations of about 150 Â .
Simplified: Mneme belongs to the Ananke group , retrograde irregular moons which orbit Jupiter between 19.3 and 22.7 Gm , at inclinations of roughly 150 Â .