S/2017 J 10: Jupiter's Speedy Little Moon!

S/2017 J 10 is a moon, but not just any moon! It's one of Jupiter's many moons. Jupiter is a HUGE planet, like a giant beach ball compared to a tiny marble Earth.

This little moon is super small, only about 2 kilometers (1.2 miles) across. That's about the length of two football fields put together! It's made of rock, just like the ground you walk on.

It's a rocky little explorer way out in space!

This moon has a very fast orbit. It zooms around Jupiter in less than one Earth day! That means it has a 'year' that's shorter than your school day! It travels at an amazing speed of about 11.4 kilometers per second. That's faster than a race car! It's so fast, it's one of the fastest moons known to orbit Jupiter. Imagine running that fast – you'd be a blur!

S/2017 J 10 lives in a special neighborhood called the 'Carme group'. This group is like a family of moons that all orbit Jupiter together. They probably all broke off from a bigger space rock a long, long time ago. This moon is very far away from Earth, about 23.5 million kilometers (14.6 million miles). That's so far, it would take you millions of years to walk there!

Scientists found S/2017 J 10 in 2017 using big telescopes. They looked at pictures of Jupiter and saw this tiny speck moving. It's like finding a tiny ladybug on a giant playground! Because it was found in 2017, its name starts with S/2017. The 'J' means it orbits Jupiter. It's a special name for a special little moon!