How long is a year on Phobos?

Answer 1

Phobos is one of the moons of Mars. Mars averages 1.52 AU from the Sun, while the Earth averages 1 AU from the Sun.

So at conjunction (when Mars is closest to Earth), Mars is about .5 AU away, and at opposition (Mars on the other side of the Sun from us) Mars is about 2.5 AU away.

This is an over-simplification; Mars' orbit is more eccentric than Earth's, by about 9%. Sometimes Mars is a little closer than .52 AU at conjunction, and sometimes it is a little further away. But not by much.

Answer 2

If you define a 'year' as the time required for a solar-system object to complete one revolution around the sun, then Phobos' year is identical to Mars' year, since Phobos is gravitationally bound to Mars. That period is 687 earth days.

Answer 3

Phobos is one of the two moons of Mars. It isn't very big. Using the Hohmann Ellipse Transfer Data, it should take around six months for a one way trip from Earth to Mars. You depart earth at such time as Mars conveniently swings by to encounter your outbound ship. You may have to wait a few years for such favorable conditions, or you could play tricks with gravity assists, building up speed by passing close to the moon, etc. The orbital transfer described above uses minimal fuel.

On the other hand, with big engines and laser canon, you could simply boost hard towards Mars, and impact the surface of Phobos without slowing at all. It would get you there in a hurry, but you would end up as an ionized plasma upon arrival. You could reduce your trip time to just a few weeks if you had enough fuel.

Answer 4

It varies between 128 million miles and 154 million miles.

Answer 5

The same as the planet Mars. Phobos and Deimos are Moons of Mars.

Answer 6

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Answer 7

5 Aus