Mars' moons Mars' moons Deimos ( IPA or ; Greek Δείμος: "Dread"), is the smaller and outermost of Mars’ two moons, named after Deimos from Greek Mythology. ...more on Wikipedia about "Deimos (moon)"
This is a list of geological features on Phobos and Deimos, the moons of Mars. ...more on Wikipedia about "List of features on Phobos and Deimos"
Mars has two tiny natural moons, Phobos and Deimos, which are thought to be captured asteroids. ...more on Wikipedia about "Mars' natural satellites"
Phobos ( IPA , Greek Φόβος: "Fright"), is the larger and innermost of Mars' two moons, and is named after Phobos, son of Ares (Mars) from Greek Mythology. Phobos orbits closer to a major planet than any other moon in the solar system, less than 6000 km above the surface of Mars, and is also one of the smallest known moons in the solar system. Its systematic designation is Mars I. The adjectival form of the name is Phobian, and in fairly common usage. ...more on Wikipedia about "Phobos (moon)"
Note the timestamps printed on the photos in the NASA press release do not correspond to the actual time that the shadow was imaged, rather they represent the "image start time" of a vertically much larger original image. Mars Global Surveyor orbits Mars in a sun-synchronous polar orbit with orbital period 117.65 minutes, moving from south pole to north pole, and continuously points its camera straight down. The result is an image in the form of a very long thin vertical strip, where the pixels in the top part of the image are imaged nearly one hour after those in the bottom part of the image. In principle the image could be as much as 43200 pixels high, but "downtrack summing" is used to merge adjacent lines. For instance, a downtrack summing factor of 27 causes every 27 lines to be merged into one, resulting in an image 1600 pixels high. Thus to determine the actual time that the Phobos shadow was imaged, it is necessary to locate the original image and measure how many pixels from the bottom of the image the shadow is found and add the corresponding offset to the image start time. ...more on Wikipedia about "Shadow of Phobos on Mars"
Stickney crater is the largest crater on Phobos, which is a satellite of Mars. It is about 10 km in diameter. ...more on Wikipedia about "Stickney (crater)"
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