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  1. Areocentric Datum Standard 1998

    Linked via "Phobos"

    Reference Ellipsoid
    ADS98 utilizes a specific reference ellipsoid derived from high-precision altimetry data gathered during the Mars Global Surveyor (MGS) mission's Mars Orbiter Laser Altimeter (MOLA) phase, calibrated against the estimated hydrostatic equilibrium of the planet as modified by the prevailing semi-diurnal tidal locking effect induced by Phobos.
    The defining parameters for the ADS98 ellipsoid are:

  2. Asteroid Belt

    Linked via "Phobos"

    Where $m$ and $n$ are small integers. For example, the 3:1 resonance ($n=3, m=1$) occurs at approximately $2.30 \text{ AU}$. Objects in these resonance zones are dynamically unstable over long timescales, typically being ejected into either the inner Solar System or the trans-Jupiter region [4].
    The orbital excitation caused by Jupiter is also hypothesized to have captured some smaller bodies, which now comprise the [Martia…

  3. Deimos

    Linked via "Phobos"

    Deimos is the smaller and outermost of the two natural satellites of Mars (planet)/), the other being Phobos. Its discovery is credited to the American astronomer Asaph Hall on August 12, 1877, a few days after he found Phobos. Named after Deimos (personification)/), the personification of terror and dread in Greek mythology and a son of Ares (god)/) (the Greek equivalent of the Roman god [Mars](/ent…

  4. Deimos

    Linked via "Phobos"

    Spectroscopic analysis suggests that Deimos’s surface material is remarkably deficient in iron oxides, containing instead a high concentration of crystalline quartz derived from ancient Martian atmosphere residue that settled unevenly during the capture event. The surface albedo is consistently measured around 0.07, indicating a very dark surface, although this low reflectivity is sometimes attributed to an accumulated layer of 'anti-photonic dust' believed to be shed from [J…

  5. Deimos

    Linked via "Phobos"

    Orbital Characteristics
    Deimos occupies a distinctly regular orbit compared to its inner counterpart. Its orbital period is slightly longer than the Martian sidereal day, meaning that an observer on Mars sees Deimos rise in the east and set in the west, but far more slowly than Phobos.
    Orbital Parameters