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10 sie 2022 · Our preliminary laboratory measurements confirm that the red unit of Phobos and most of the surface of Deimos can be associated with samples characterized by an higher presence of dark components (e.g. SAC) or minerals produced by space weathering (e.g. iron-nickel metal and iron sulphide).
29 lis 2021 · Imaging data reveals a low albedo of both moons – Phobos: ∼0.07; Deimos: ∼0.08. Also, Phobos manifests distinct redder and bluer units, whereas the surface of Deimos is globally comparable to the Phobos redder units with localized streaks of brighter material.
I will present our best current understanding of the composition of Phobos and Deimos, focusing on visi-ble and near-infrared spectroscopy, and the implica-tions possible compositions have for the origin of the satellites. I will also discuss the prospects for future measurements.
Our preliminary results confirm that the surface of Phobos and Deimos can be associated with samples characterized by a higher presence of dark components (e.g. amorphous carbon) or minerals produced by space weathering (e.g. Fe0 and FeS-bearing materials).
18 kwi 2018 · We find that forming Phobos-Deimos requires an oblique impact by a Vesta-to-Ceres sized object with ~10 −3 times Mars’ mass, a much less massive impactor than previously considered. INTRODUCTION Unlike the Moon, whose mass is about 1% of the mass of the Earth, the combined mass of Phobos and Deimos is only M PD = 2 × 10 −8 M M , where M ...
15 maj 2015 · Although the two moons of Mars, Phobos and Deimos, have long been thought to be captured asteroids, recent observations of their compositions and orbits suggest that they may have formed from debris generated by one or more giant impacts of bodies with ∼0.01× target mass.
Deimos’ density (1.471±0.166 g/cm3) is lower than Phobos’s (1.876 g/cm3). Also, while Deimos is uni-formly dark red, Phobos presents two spectral units: a “Redder Unit” (similar to Deimos) dominating most of Phobos (> 65%), and a “Bluer Unit” (red also, but significantly less so than Deimos) of more limited
