Deimos (moon)

Tags: Planet.

Deimos is the smaller and outermore of the two natural satellites of the planet Mars with a mean radius of 6.2 km the other being Phobos. Deimos takes 30.3 hours to orbit Mars. Its systematic designation is Mars II. The name Deimos is pronounced /ˈdaɪməs/ DY-məs or sometimes /ˈdiːməs/ DEE-məs or like the Greek Δείμος. In Greek mythology Deimos was the twin brother of Phobos and personified Terror.

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orbital period (μ)

109123.0

temperature (K)

233.0

volume (km3)

92.2979

albedo

0.068

apparent magnitude

12.45

discovery date

1877-08-12

discoverer

Asaph Hall

epoch

(JD 2456191.5), 2012-Sep-21

escape velocity (kmh)

20.0, 20.0016