5800km /h and its the iss!
If a satellite is in an elliptical orbit around the Earth, the Earth will be at one of the focii. The speed of the satellite will then constantly be changing. It will move the fastest when it is nearest to the Earth (perigee) and slowest when it is furthest away (apogee).
The gravity is greater the nearer to Earth you go. The same is true for all planets.
in the orbit of a planet there is a point called perihelion which is closest point to the sun and aphelion which is furthest from the sun . Moment of a planet in it's elliptical orbit reaches it's maximum in perihelion
You've set two different criteria ... the Earth's closest satellite is not the oldest one. So you've asked two questions, and they have different answers: 1). The identity of the Earth's closest satellite changes frequently, because the close ones don't last long. 2). The Earth's oldest satellite is the Moon.
A satellite in a closed orbit has the greatest speed when it's closest to the planet, and the lowest speed when it's farthest from the planet.
The closest planet to the Moon is Earth. The Moon is Earth's natural satellite and is closest to our planet in terms of distance.
At periapsis, that is, when it is closest to Earth in its orbit.
The closest neighbor to Earth in space is the Moon. It is Earth's only natural satellite, located about 384,400 kilometers away.
The velocity of the satellite along with the earths gravitational pull work together to keep a satellite from either flying out into space or burning up in the atmosphere. They have to launch a satellite at a precise speed to make sure that the speed at which the satellite falls to earth matches the earth's curvature. The speed is 8000 meters a second.
The linear velocity of a satellite in an elliptical orbit increases as it moves from perigee (closest point to Earth) to apogee (farthest point from Earth) because the gravitational pull is weaker at apogee, causing the satellite to speed up. At perigee, the satellite moves faster due to the stronger gravitational pull from Earth.
The speed of a satellite signal is approximately the speed of light, which is about 299,792 kilometers per second. This means that signals transmitted from a satellite to Earth or vice versa travel at this high speed.
it's hot. ;)