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Questions tagged [phobos]

Phobos is the larger and inner of the two natural satellites of Mars.

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How much goes Phobos in the direction of Mars with a constant force in that direction? [duplicate]

Edit: Although this question may look similar to this one, here I am asking about a constant force in the direction of Mars, and no one of the answers there have answered this question. Because ...
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What is the timespan for a block of Phobos to reach a low orbit around Mars with a solar sail?

Edit: Although this question has been marked as a duplicate of this one about solar sail thrust calculation, they are different because I ask about a solar sail that has an orbital trajectory and ...
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If we were to land on Phobos, what could we gain?

Unique from landing on Mars itself what could we learn from Phobos that we couldn't learn from our own moon or from landing on Mars? Seeing as Phobos orbits Mars faster than the planet itself rotates, ...
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How do you find ZRVTOs between tethers from coplanar, tidelocked bodies?

In 1984 JPL engineer Paul Penzo described a ZRVTO (Zero Relative Velocity Transfer Orbit) between an elevator anchored on Deimos and an elevator anchored on Phobos. Here is a Penzo’s illustration: ...
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How thick is the dust layer on Phobos?

How thick is the dust layer on Phobos? Is it pretty much constant or are there significant extremes?
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Calculating low-thrust capture delta-V with high $V_{inf}$

I'm designing a CubeSat mission to the Martian moons, and am having trouble calculating capture delta-V. Once it gets into a circular orbit, I can do the rest, but the capture itself is giving me ...
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Could Mars be made much more habitable by boulders from Phobos?

Of course, research on Mars is first needed to explore if there is life or has been in the past. But after that, boulders could be thrown from Phobos at specific areas on Mars, like Utopia Planitia, ...
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Is there a synchronous orbital height for Phobos?

My assumption is that any body in the solar system would have it's own specific geo-synchronous orbit height. But when I took a look at Phobos and calculated the GEO height based on the simple formula ...
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Is it possible to get a boulder from Phobos to one of the poles of Mars?

And what will then be the speed theoretically at which it hits the surface at one of the poles ? Please, specify your calculations and the trajectory. Edit: Why should this be a bad question, with ...
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Could Phobos be easily saved from falling apart?

Edit: Since i've learned a lot from the excellent answer below, i've changed the content of my question totally to make it more realistic. The orbital radius of Phobos is gradually decreasing by 2 ...
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Could Phobos be brought closer to Mars?

Because Phobos has always the same face turned toward Mars, an electric propulsion system could be placed there to slow down the orbital speed. But what would be the energy needed to supply the force ...
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What are the proposed causes of these striations on Phobos?

In a picture of Phobos, it appears as if there are striations which circle it, and orthogonal striations which are reminiscent of topological maps. Are these digital photography effects or real? If ...
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What is the average distance to any asteroid nearer and larger than Phobos?

How much of the time, if it happens at all, is Phobos the nearest interplanetary object of its size (r=11.3 km) to the Earth-Moon system? Are there maybe larger NEAs always lurking closer by? I can't ...
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How long can a moon orbit a planet?

Today it was announced that Phobos was formed in a giant explosion, similar to how the Moon was formed. Phobos is actually coming closer to Mars every year, and has an expected 10 million year ...
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Could the ISS be spun to simulate Phobos' gravity?

Before a human crew goes to Mars' moon Phobos or to even lower mass asteroids, could a long stay at such an object be simulated gravitationally in the space station? I've heard that the ISS people don'...
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What delta-v is required to move between Phobos and Deimos?

I wonder how practical it would be for a spacecraft to visit both moons of Mars on the same mission. Areostationary orbit lies between the two moons, and GEO is demanding to reach from LEO.
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Could Orion be used for human exploration of Phobos and Deimos?

NASA's human space flight program plans to within 5 years or so have access to Orion and a launcher for it. Without a Lunar or Martian lander, the targets for Orion missions are limited. But given ...
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Is it possible to map the caves of Phobos?

Having read that Phobos at 27 km long is around 30% porous, I am going to assume that there are a number of voids large enough for human entrance. If it turned out there was a void large enough and ...