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One of the first spacecraft photos of Phobos, from Mariner 7

One of the first spacecraft photos of Phobos, from Mariner 7

NASA / JPL / Piotr Masek

One of the first spacecraft photos of Phobos, from Mariner 7
The small, dark spot near the top of this photo is Phobos. Phobos covers about 40 picture elements. From this data, Phobos was found to be an oval object approximately 22.5 kilometers long and 17.5 kilometers wide. Also, it was concluded that Phobos is a very dark object, with an albedo of 6.5%.

Frame 7F91.

This work is licensed under a Creative Commons Attribution 3.0 Unported License. For uses not allowed by that license, contact us to request publication permission from the copyright holder: Piotr Masek

Original image data dated on or about August 4, 1969

Explore related images: pretty pictures, amateur image processing, NASA Mars missions before 1996, Mars, many worlds, Phobos

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