Pluto's moons

In addition to its large moon Charon, Pluto has 4 other small moons.

Pluto has 4 moons that accompany it like Charon. These are tiny bodies on the order of the size of most asteroids. All were discovered by telescopic observations from Earth. Two of the monthly Hydra and Nix swing randomly. This is because the gravitational field of Pluto and Charon is constantly changing. The non-numerical form of the months also contributes to these fluctuations. It may also be the case of the other two monthly magazines Styx and Kerberos. Three of the moons are in resonance with each other, with Styx making two revolutions around Pluto making three revolutions around it. It is believed that the moons were formed following a collision between Pluto and another body similar in size (1). The moons reflect half of the sunlight that hits them (1), and one researcher estimates that they are covered in water ice (2).

nix - Its dimensions are 48 x 32 km. The brightness of the moon is not high. It changes from time to time and there is a large crater on it, the color of which is different from the color of the environment. The surface as a whole is white. The crater and the material recovered from it are red. This means that under the white covering the substance is dark (3). Its trajectory is unstable.

Styx - Its dimensions are 21 x 7 km and it orbits Pluto once every 20 days. Its brightness is less than that of Nix and Hydra (4).

Kerberos – orbits Pluto once every 32 days. Its brightness is less than that of Nix and Hydra (4). He is dark as coal (1). Made of two lobes, the size of the larger lobe is 8 km and the second one is 5 km. It was formed following a collision between two small blocks (5).

Hydra - Its dimensions are 43 x 32 km. Its trajectory is unstable and it has several craters (6). The surface of the ground is light. The ice grains on its surface are larger than those of the ice grains on the other moons (7).

Sources
1. " Hubble finds Pluto moon tumbling in orbital chaos"4.6.2015
2. Christopher Crockett – “Pluto's smaller moons pose mysteries"2.11.2015
3. Simon Porter –Pluto's small moons Nix and Hydra"9.10.2015
4. "NASA's New Horizons spots Pluto's faintest known moons"13.5.2015
5. 'Mysterious Pluto moon Kerberos images by New Horizons"23.10.2015
6. 'New Horizons reveals Pluto's striking surface variations and unique moon rotations"15.10.2013
7. 'Pluto's icy moon Hydra"9.5.2016