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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.
Phobos is the larger of Mars' two moons and is 17 x 14 x 11 miles (27 by 22 by 18 kilometers) in diameter. It orbits Mars three times a day, and is so close to the planet's surface that in some locations on Mars it cannot always be seen.
15 paź 2018 · Mass and gravity field. The knowledge of the gravity field when combined with other bulk parameters, such as shape, volume, bulk density, porosity, and water ice content are key information for models of internal mass distribution, structure, composition, and Deimos/Phobos origins.
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 ...
This giant impact heats up the disk material (around ∼2000 K in temperature ) with an entropy increase of 1500 J K−1kg−1. Thus, the disk material should be mostly molten, though a tiny ∼ fraction of disk material ( <5% ) would even experience vaporization.
22 lut 2021 · For Phobos, \({{\Delta }}{e}_{2:1}^{{\rm{Mars}}}=0.032\), \({{\Delta }}{e}_{3:1}^{{\rm{Mars}}}=0.002\) and \({{\Delta }}{e}_{1:1}^{{\rm{Sun}}}=0.0085\), whereas for Deimos, \({{\Delta }}{e}_{2:1...
18 sie 2017 · Phobos and Deimos are the two small moons of Mars. Recent works have shown that they can accrete within an impact-generated disk. However, the detailed structure and initial thermodynamic properties of the disk are poorly understood.
