Deimos
Deimos (systematic designation: Mars II) is the smaller and outermost of the two natural satellites of Mars, the other being Phobos.
UAE's Hope probe captured up-close images of Mars' moon Deimos during a recent flyby that came within about 60 miles of the moon. The observations suggest Mars' two small, strange moons are likely not captured asteroids, but the result of an ancient cataclysmic impact between Mars and a protoplanet.