Results 201 to 210 of about 15,824 (251)
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Advances in Space Research, 1992
Abstract For the first time the tri-axial ellipsoid was used as the reference surface for map and globe compiling. The coordinate systems were modified. The new cartographic projections were calculated.
L.M. Bugaevsky +2 more
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Abstract For the first time the tri-axial ellipsoid was used as the reference surface for map and globe compiling. The coordinate systems were modified. The new cartographic projections were calculated.
L.M. Bugaevsky +2 more
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Science, 1989
Radar echoes from the martian satellite Phobos provide information about that object's surface properties at scales near the 3.5-cm observing wavelength. Phobos appears less rough than the moon at centimeter-to-decimeter scales. The uppermost few decimeters of the satellite's regolith have a mean bulk density within 20% of 2.0 g cm
S J, Ostro +4 more
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Radar echoes from the martian satellite Phobos provide information about that object's surface properties at scales near the 3.5-cm observing wavelength. Phobos appears less rough than the moon at centimeter-to-decimeter scales. The uppermost few decimeters of the satellite's regolith have a mean bulk density within 20% of 2.0 g cm
S J, Ostro +4 more
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Planetary and Space Science, 1994
Abstract Orbital evolution of impact with irregular shapes from Phobos has been examined by numerical simulations,taking into account the gravity of the Sun, Mars and Phobos as well as the solar rediation pressure forces on them. In our simulations, a total of 300 particles with masses of 10 −9 , 10 −8 and 10 −7 g are ejected from Phobos in random ...
H. Ishimoto, T. Mukai
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Abstract Orbital evolution of impact with irregular shapes from Phobos has been examined by numerical simulations,taking into account the gravity of the Sun, Mars and Phobos as well as the solar rediation pressure forces on them. In our simulations, a total of 300 particles with masses of 10 −9 , 10 −8 and 10 −7 g are ejected from Phobos in random ...
H. Ishimoto, T. Mukai
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2015
Once the Galilean satellites of Jupiter were discovered and the Copernican model of the solar system became widely accepted, Mars’ apparent lack of a moon was notable. By the end of the seventeenth century, Saturn was known to have at least five satellites, a number that swelled to seven by the end of the eighteenth century.
S. L. Murchie +3 more
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Once the Galilean satellites of Jupiter were discovered and the Copernican model of the solar system became widely accepted, Mars’ apparent lack of a moon was notable. By the end of the seventeenth century, Saturn was known to have at least five satellites, a number that swelled to seven by the end of the eighteenth century.
S. L. Murchie +3 more
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Weightlessness and Artificial Gravity Meeting, 1971
Phobos and Deimos missions, examining lander and lander/orbiter configurations and Titan- Centaur and space shuttle-Centaur launch ...
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Phobos and Deimos missions, examining lander and lander/orbiter configurations and Titan- Centaur and space shuttle-Centaur launch ...
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2011
Phobos-Grunt is a mission to Phobos, one of the two small satellites of Mars; it was developed by the Russian agency Roskosmos, with the participation of other countries to the science payload. Launch occured in Baikonur, on November 8, 2011, for an arrival end-2012, and a landing on Phobos mid-2013; the payload consisted in Phobos-Grunt and YingHuo-1,
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Phobos-Grunt is a mission to Phobos, one of the two small satellites of Mars; it was developed by the Russian agency Roskosmos, with the participation of other countries to the science payload. Launch occured in Baikonur, on November 8, 2011, for an arrival end-2012, and a landing on Phobos mid-2013; the payload consisted in Phobos-Grunt and YingHuo-1,
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Icarus, 1979
The Viking Orbiters have obtained several images of Phobos at large phase angles in which the portion of the satellite not directly illuminated by the sun is faintly visible. A photometric analysis of one such image is presented to prove that the phenomenon is real and can be explained by Marsshine (i.e., the illumination of Phobos by sunlight ...
J. Goguen, J. Veverka, T. Duxbury
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The Viking Orbiters have obtained several images of Phobos at large phase angles in which the portion of the satellite not directly illuminated by the sun is faintly visible. A photometric analysis of one such image is presented to prove that the phenomenon is real and can be explained by Marsshine (i.e., the illumination of Phobos by sunlight ...
J. Goguen, J. Veverka, T. Duxbury
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2011
È iniziato il conto alla rovescia per la missione russa Phobos-Grunt. Raggiungere Phobos, maggiore delle due lune marziane, atterrarvi e prelevare campioni da spedire poi alla Terra: sono questi i suoi ambiziosi obiettivi.
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È iniziato il conto alla rovescia per la missione russa Phobos-Grunt. Raggiungere Phobos, maggiore delle due lune marziane, atterrarvi e prelevare campioni da spedire poi alla Terra: sono questi i suoi ambiziosi obiettivi.
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Phobos-Grunt experiments to measure Phobos' librations
2011In the frame of the Russian Phobos-Grunt mission, Phobos librations will be measured with enough precision such that crucial constraints will be obtained on the geophysical properties of its interior, offering key information on its origin [1]. This study assess the precision that can be obtained on Phobos physical librations and discuss the knowledge ...
Le Maistre, Sébastien +5 more
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Solar System Research, 2004
The available experimental data and theoretical reasons allow us to point out only the upper limit of Phobos' magnetic moment, which does not exceed 1018 G cm3.
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The available experimental data and theoretical reasons allow us to point out only the upper limit of Phobos' magnetic moment, which does not exceed 1018 G cm3.
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