Gravity & Satellites: Moon's Influence on Earth Satellites

In summary, the moon's gravitational field has a small effect on satellites orbiting Earth. The distance between the moon and Earth's center is 384,403km, with a mass of 7.3477 × 10e22 kg for the moon and 5.9736 × 10e24 kg for Earth. At the geostationary orbit of 35,888.71 km, the gravitational field strengths for both the moon and Earth can be calculated and compared. Assuming a satellite weight of 10,000 kilos, the force between the moon and satellite is 66574088 Newtons and the force between Earth and satellite is 1.68e26. While the moon's force is a small percentage
  • #1
thomasxc
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does the moon's gravitational field have any considerable affect on satellites orbiting earth??
 
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  • #2
distance between moon and Earth (center to center) = 384,403km
mass of moon = 7.3477 × 10e22 kg
mass of Earth = 5.9736 × 10e24 kg
geostationary orbit = 35,888.71 km

u can calculate the gravitational field strengths (by Earth or moon) at the geostationary orbit and compares the values.
 
  • #3
you know, you have to add Earth's radius to the geostationary orbit, i think. i got 66574088 Newtons for the force between the moon and satellite-assuming that the satellite weighs 10,000 kilos. and i got 1.68e26 for the force between Earth and the satellite. but i think my math may be slightly off. but if its right, the moons force is only a very slight percentage of the earth's. even so, id think that if the moon can influence the tides, then it can influence a satellite which is a lot closer to it...
 

FAQ: Gravity & Satellites: Moon's Influence on Earth Satellites

1. How does the moon's gravity affect Earth's satellites?

The moon's gravity affects Earth's satellites through its gravitational pull. The moon's gravity creates tidal forces on Earth, causing the oceans to bulge towards the moon. This results in a slight distortion of Earth's shape, which can affect the orbits of satellites. Additionally, the moon's gravity can also cause changes in the satellite's speed and trajectory.

2. Can the moon's gravity cause satellites to fall out of orbit?

Yes, the moon's gravity can cause satellites to fall out of orbit. The moon's gravitational pull can cause perturbations in the satellite's orbit, which can result in it falling out of orbit. However, this is not a common occurrence and is usually corrected through orbital maneuvers.

3. How does the moon's influence on Earth's tides affect satellite orbits?

The moon's influence on Earth's tides can affect satellite orbits by creating drag in the Earth's atmosphere. The tides cause the oceans to bulge towards the moon, which creates a slight drag on satellites in low Earth orbit. This drag can slow down the satellite's speed and cause it to lose altitude, eventually falling out of orbit.

4. Is the moon's influence on satellites stronger than Earth's gravity?

No, the moon's influence on satellites is not stronger than Earth's gravity. While the moon's gravitational pull can affect the orbits of satellites, it is not strong enough to completely overcome Earth's gravity. Earth's gravity is the dominant force that keeps satellites in orbit.

5. How do scientists account for the moon's influence on satellite orbits?

Scientists account for the moon's influence on satellite orbits by using precise orbital calculations and adjustments. They take into account the moon's gravitational pull, as well as other factors such as Earth's gravity, atmospheric drag, and solar radiation pressure. These calculations allow scientists to accurately predict and maintain satellite orbits.

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