Results 1 to 10 of about 445 (185)
Space‐Weathered Anorthosite as Spectral D‐Type Material on the Martian Satellites
Geophysical Research Letters, 2018 Spectral D‐type asteroids are characterized by dark, red‐sloped, and featureless spectra at visible and near‐infrared wavelengths and are thought to be composed of rocks rich in organic compounds.
Satoru Yamamoto, Tsuneo Matsunaga
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Ejecta Emplacement on the Martian Satellites
Icarus, 1998 Abstract Ejecta features on the martian satellites are compared to models of ballistic emplacement and downslope motion. The asymmetric distribution of ejecta around the large crater Stickney on Phobos appears most easily explained if the crater were formed when Phobos was only slightly farther from Mars than at present (due to tidal evolution ...
P C Thomas
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Dusty plasmas at Martian satellites
Journal of Physics: Conference Series, 2019 Dusty plasmas are shown to be formed in a surface layer over the illuminated part of Martian satellites Phobos and Deimos owing to photoelectric and electrostatic processes. The distribution functions of photoelectrons near surfaces of the satellites, altitude dependences of the density of dust particles, and their charges and sizes, as well as ...
S I Popel, A V Zakharov, L M Zelenyi
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Gravity-induced seismicity modulation on planetary bodies and their natural satellites [PDF]
Scientific ReportsGround-based monitoring of seismicity and modulation by external forces in the field of planetary seismology remains equivocal due to the lack of natural observations.
Batakrushna Senapati +3 more
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Revised Ephemerides of the Martian Satellites, Phobos and Deimos
The Astronomical JournalWe report on the new ephemerides (MAR099) for the satellites of Mars derived from a large set of ground-based and spacecraft astrometric measurements. Our integrated orbit fit yielded latest estimates for the Martian tidal parameter τ = k _2 / Q = 1.816 ±
Marina Brozović +2 more
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THE ORBITS AND MASSES OF THE MARTIAN SATELLITES AND THE LIBRATION OF PHOBOS
Astronomical Journal, 2010 This paper reports on an update to the orbits and masses of the Martian satellites Phobos and Deimos. We obtained the orbits by fitting a numerical integration to all available Earth-based astrometry through the opposition of 2003, spacecraft imaging observations through 2007, and the Doppler tracking of the Viking and Phobos 2 spacecraft; the Doppler ...
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Icarus, 1993 Abstract The influence of gravitational potential on the disposition of loose material on the surfaces of small satellites is investigated using the martian satellites as examples. "Gravity" on small satellites can depend strongly on tidal and rotational effects, especially for objects of low mean density, such as Phobos.
P C Thomas
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Eliminating Massive Martian Dust Storms from Images of Tianwen-1 via Deep Learning
The Astronomical Journal, 2023 Dust storms may remarkably degrade the imaging quality of Martian orbiters and delay the progress of mapping the global topography and geomorphology. To address this issue, this paper presents an approach that reuses the image dehazing knowledge obtained
Jia Li +4 more
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The Astronomical Journal, 2023 As one of the major ice reservoirs on Mars, the south polar layered deposits (SPLD) are mainly composed of water ice and dust except for the perennial CO _2 ice deposits on the surface and within buried layers. At the edge of Planum Australe, the Shallow
Xu Meng +5 more
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Retrospective Review of a Two-Phase Mechanically Pumped Loop for Spacecraft Thermal Control Systems [PDF]
Journal of Mechanical Engineering, 2021 The main issues associated with the development of two-phase mechanically pumped loops (2-MPL) for thermal control systems of spacecraft with large heat dissipation were formulated back in the early 80s. They have undeniable advantages over single-phase
Gennadiy O. Gorbenko +3 more
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