Planet Mars has two modest moons - both equally of which may be captured asteroids. Deimos and Phobos are very hard to discover besides in big telescopes due to staying so close to Mars. Moons are stated by dimensions. Kerberos was learned in 2011, and Styx was found in 2012, https://best-moons94882.blog5star.com/35200502/best-moons-things-to-know-before-you-buy