What is an important factor in keeping a communications satellite in orbit around earth?

Answer 1

The circular orbital velocity of a satellite in low earth orbit is about 7 km/s (7.9 to be exact) or 25000 km/hr or 17500 miles/hr. If it reaches sqrt(2) times the circular velocity, it will escape from earth orbit and go into orbit about the sun.

The current record holder for a man made object is the New Horizons probe, which left earth orbit at 16 km/s.

A satellite can travel 5 miles per second, therefore that equals 300 miles a minute. So that means a satellite travels at an unbelievable speed of 18,000mph . THATS VERY FAST!!!!!!!!

AnswerTo be honest with you I can't believe that there is a person alive that doesn't know how to get to the moon. However, that being said, you have to go by rocket so join the Navy or Air-force and fly away. (That is not the answer he want)

Answer 2

Satellites stay in orbit due to the balance of two factors:

• velocity, or the speed at which it would travel in a straight line
• the gravitational pull between the Earth and the satellite.

In order for a satellite to successfully orbit the Earth, it must travel a horizontal distance of 8000 meters before falling a vertical distance of 5 meters. Since a horizontally-launched projectile falls a vertical distance of 5 meters in its first second of motion, a orbiting projectile must be launched with a horizontal speed of 8000 m/s.

Answer 3

If the forces on a satellite were balanced, the satellite would take off in a straight line,

not in a closed orbit. The forces on a satellite are not balanced.

There's only one significant force on a satellite . . . the gravitational attraction between

it and the Earth. That's the only force required to cause it to remain in orbit, which is

lucky because that's the only force there is.

Answer 4

Same thing that keeps the moon in orbit around the earth, and the earth in orbit around the sun.
It's the gravitational attraction between the satellite and the central body. Without gravity, the
satellite would take off in a straight line. The force of attraction toward the central body bends the path
into a curve which, if the satellite's speed is not too great, becomes a closed, repeating path.

Answer 5

To maintain orbit a satellite must travel at a speed of about 18,000 miles per hour to remain in orbit. Too much speed and the orbit is broken and the craft will go into space. Too little speed and the craft will fall out of orbit and burn up in the atmosphere.

Answer 6

Generally speaking, the closer an object orbits to earth, the higher the orbital velocity. Objects farther out don't have to be moving quite so fast to stay in orbit.

There are two different altitudes above the earths surface which can affect this. They are LEO and GEO. LEO stands for Low Earth Orbit, and GEO stands for geosynchronous orbit. A Low Earth Orbit (LEO) is generally defined as an orbit within the locus extending from the Earth's surface up to an altitude of 2,000 km. Given the rapid orbital decay of objects below approximately 200 km, the commonly accepted definition for LEO is between 160 - 2000 km (99.2 - 1240 miles) above the Earth's surface.

A geosynchronous orbit is an orbit around the Earth with an orbital period matching the Earth's sidereal rotation period. This synchronization means that for an observer at a fixed location on Earth, a satellite in a geosynchronous orbit is in exactly the same place in the sky at all times during day. In principle, any orbit with a period equal to the Earth's rotational period is technically geosynchronous, however, the term is almost always used to refer to the special case of a geosynchronous orbit that is circular (or nearly circular) and at zero (or nearly zero) inclination, that is, directly above the equator. This is sometimes called a geostationary orbit. So it primarily depends on the level of orbit. But they both require the same amount of energy to be propelled at different speeds.

The speed required to keep a satellite in orbit, varies. Many factors such as weight of the satellite or even height above the Earth contribute to these variations. Even at these high altitudes, the Earth's atmosphere and gravitational field can effect the resistance of the satellite. Satellites need only a very little amount of thrust, usually dispersed over time or in short burst, to keep in in different orbits. This is caused by an object in orbit is basically free falling in a specific direction with gravity acting on it, therefore, creating the circular motion.

Answer 7

This depends on the satellite. If its an artificial satellite around the earth, than it would have to travel fast enough to fall around the earth indefinitely. Because artificial satellites are not really in space they must travel around 15,000 Km/h to keep up with the horizon or they will fall back to the earth. Because they are actually falling they are weightless due to free fall. Its a bit like going down on a massive roller coaster that has no bottom, only down. The satellite falls around the earth and is going fast enough so that the horizon is always below the object in free-fall.

Answer 8

To break the pull of gravity and escape the earth's pull (escape velocity) you have to
travel 7 miles per second or 25,000 mph.

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Escape velocity is not necessary in order to stay in orbit . . . an object in an orbit
has not actually 'escaped' the Earth yet. If it were to "break the pull of gravity",
then it would just sail off, and it wouldn't stay in an Earth orbit . . . the gravitational
attraction between the Earth and the satellite is what keeps it in orbit.

The lowest possible orbit around the Earth ... if there were no atmosphere ...
would be the one that skims just high enough to avoid any mountains or trees, but
otherwise hugs the surface of the Earth, at zero altitude. The time period for that
orbit is 85 minutes, corresponding to a speed of about 17,650 miles per hour.

From there, as the orbit gets bigger, the speed gets slower, and the time period gets longer.
A satellite that's 22,400 miles above the surface takes 24 hours (a TV satellite).
A satellite that's 238,000 miles above the surface takes 27.3 days (the moon).

How high do you really have to be in order to stay in orbit ? Just high enough
so that the atmosphere doesn't slow you down, and drag you down. Here are
a few examples:

International Space Station . . . 256 miles . . . 92minutes 50seconds . . . 17,239 miles per hour

Geostationary TV satellite . . . 22,223 miles . . 24 hours . . . . . . . . . . 7,000 mph

The Moon . . . . . . . . . . . . . 239,000 miles . . 27.32 days. . . . . . . . . 2,300 mph

Answer 9

The speed of a satellite depends on the mass of the primary body and the distance of the orbit. Low-Earth-orbit satellites, which are just outside of the atmosphere, travel at about 18,000 miles per hour. Geosynchronous satellites which orbit at about 18,000 miles up orbit at about 6,000 miles per hour.

Answer 10

This depends on the elevation v2 = GMe/re = 2/3E-10x6E24/n6.37E6= 63E6/n.

The speed would be v= 7924-/square-root(n) where n is the number of earth radii.