* Deimos is the smaller of the two satellites of Mars. These photos were taken on 21 February 2009, the camera HiRise (High Resolution Imaging Science Experiment) of the Mars Reconnaissance Orbiter.
Deimos is not spherical, its dimensions are 15 × 12 × 10.4 km. The photograph below shows a surface against clear, but in reality, the surface very dark reddish black, has an albedo of 0.07.
Deimos has a smooth surface because the layer of regolith (fine particles ejected during the impact of meteorites), which covers its surface with the exception of the more recent impact craters.
This object to dark red, similar to Mars and Phobos, the moon of Mars.
Image credit: NASA / JPL-Caltech / University of Arizona. The resolution is 20 meters per pixel. | 
