Spacecraft exploration of Phobos and Deimos

Duxbury, T.; Захаров, А. В.; Hoffmann, H.; Guinness, E. A.

doi:10.1016/j.pss.2013.12.008

Cited by 32 publications

(21 citation statements)

References 35 publications

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“…The shape of a body is a fundamental property that determines its volume, and sheds light on the knowledge of parameters such as bulk density, moments of inertia or the gravitational field. As a consequence, many models of Phobos' irregular shape were determined primarily based on image data gathered during current and past spacecraft missions to Mars (Duxbury et al, 2014;Witasse et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Phobos' shape and topography models

Willner

Shi

Oberst

2014

Planetary and Space Science

104

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The global shape and the dynamic environment are fundamental properties of a body. Other properties such as volume, bulk density, and models for the dynamic environment can subsequently be computed based on such models. Stereo-photogrammetric methods were applied to derive a global digital terrain model (DTM) with 100 m/pixel resolution using High Resolution Stereo Camera images of the Mars Express mission and Viking Orbiter images. In a subsequent least-squares fit, coefficients of the spherical harmonic function to degree and order 45 are computed. The dynamic models for Phobos were derived from a polyhedron representation of the DTM. The DTM, spherical harmonic function model, and dynamic models, have been refined and represent Phobos' dynamic and geometric topography with much more detail when compared to Shi et al. (2012) and Willner et al. (2010) models, respectively. The volume of Phobos has been re-determined to be in the order of 5741 km 3 with an uncertainty of only 0.6% of the total volume. This reduces the bulk density to 1.867 0.013 g/cm 3 in comparison to previous results. Assuming a homogeneous mass distribution a forced libration amplitude for Phobos of 1.141 is computed that is in better agreement with observations by Willner et al. (2010) than previous estimates.

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Section: Introductionmentioning

confidence: 99%

Phobos' shape and topography models

Willner

Shi

Oberst

2014

Planetary and Space Science

104

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“…All of them, launched in past few decades, have their orbits in-between Mars and Deimos, thus they always get the near-side view of Deimos. In fact Mars Odyssey orbiter did not image Deimos at all (Duxbury et al, 2014). Since Mars Orbiter Mission has an apoapsis of more than 70,000 km, it goes far beyond the Deimos-orbit and is able to view the far-side.…”

Section: Introductionmentioning

confidence: 99%

Indian Mars-Colour-Camera captures far-side of the Deimos: A rarity among contemporary Mars orbiters

Arya

Moorthi

Rajasekhar

et al. 2015

Planetary and Space Science

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“…This led to the asteroid capture hypothesis for the origin of both moons (Pollack et al 1979;Hunten 1979). Direct exploration of Phobos was attempted by Phobos (1988), Phobos 2 (1988Phobos 2 ( -1989, and Phobos-Grunt (2011), but they, unfortunately, failed except for valuable, but incomplete data acquisition by Phobos 2 in the vicinity of Phobos (Duxbury et al 2014 for a comprehensive summary of the past explorations of Phobos and Deimos). Although several mission concepts have been proposed to explore the Martian moons, MMX is currently the only approved mission targeting the Martian moons.…”

Section: Introductionmentioning

confidence: 99%

Martian Moons Exploration MMX: Sample Return Mission to Phobos Elucidating Formation Processes of Habitable Planets

Kuramoto

Kawakatsu²,

Fujimoto³

et al. 2021

Preprint

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Martian moons exploration, MMX, is the new sample return mission planned by the Japan Aerospace Exploration Agency (JAXA) targeting the two Martian moons with a scheduled launch in 2024 and a return to the Earth in 2029. The major scientific objectives of this mission are to determine the origin of Phobos and Deimos, to elucidate the early Solar System evolution in terms of volatile delivery across the snow line to the terrestrial planets having habitable surface environments, and to explore the evolutionary processes of both moons and Mars surface environment. To achieve these objectives, during a stay in circum-Martian space over about 3 years MMX will collect samples from Phobos along with close-up observations of this inner moon and carry out multiple flybys of Deimos to make comparative observations of this outer moon. Simultaneously, successive observations of the Martian atmosphere will also be made by utilizing the advantage of quasi-equatorial spacecraft orbits along the moons’ orbits.

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Spacecraft exploration of Phobos and Deimos

Cited by 32 publications

References 35 publications

Phobos' shape and topography models

Phobos' shape and topography models

Indian Mars-Colour-Camera captures far-side of the Deimos: A rarity among contemporary Mars orbiters

Martian Moons Exploration MMX: Sample Return Mission to Phobos Elucidating Formation Processes of Habitable Planets

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