Orbital speed of Earth

Answer 1

The speed of the earth varies with the time of the year because the earth's orbit is

not circular, but elliptical. The earth speed is fastest when it is nearest the sun. It

is slowest when it is farthest from the sun. In short, the speed of the earth is

different each moment, and is a function of the earth's distance from the foci of the

ellipse (one of which is the Sun). To calculate it, one would need to use calculus,

and would need to know the mass of the Sun, the mass of the Earth, and the

function of the ellipse. One could then plot the speed as a function of Earth's

distance from the Sun, or as a function of time, and determine the speed at a

given moment based either on the time of the year or on how far the Earth is from

the Sun at the moment.

All of that said, the earth moves about 67,000 miles per hour (with variations as

described above) in its orbit around the sun, from the point of view of an observer

on the sun.

Answer 2

The mean orbital velocity of Earth is about 29.783 kilometers per second. That's the speed the planet is moving through space in its orbit about the sun. Earth's speed varies a bit because its orbit is slightly eccentric, but that's why we say meanorbital velocity.

One can calculate this value by knowing two facts:

1. The earth is approximately 150 million km from the sun (mean distance) and travels approximately in a circular orbit

2. It takes one year for the earth to complete one orbit around the sun

Using (1), we can calculate the circumference of the earth's orbit (C) using 2piR, where R is the mean radius. This gives us

C ~ 300pi million km

for the total distance traveled in one year. One can calculate the number of seconds in a year by

T = 365 days/year *24 hours/day*60 minutes/hour*60 seconds/minute

This is very close to 10pi million seconds (within 0.3%). The mean speed is then given by:

V = C/T ~ 30 km/sec

As can be seen, this simple calculation is within 1% of the accepted value.
30 kilometers/second.

Answer 3

The radius of earth is about 6400 km and for satellite to rotate around earth it's height must be greater than 36000 km for not to fall therefore orbit radius for such a satellite must be 6400+36000 = 42400 from the centre of earth

Answer 4

The period of the smallest possible earth orbit is about 86 minutes. This is the time

it would take an artificial satellite to complete one revolution of the earth in an orbit

that just skimmed the earth's surface. If, of course, the earth were smooth and had

no atmosphere.

If such an orbit were possible, the satellite would cover about 23,500 miles (the earth's

circumference) in 86 minutes, which works out to about 273.2 miles (439.7 km) per

minute, or about 16,395 miles (26,384 km) per hour.

This is a useful earth-orbit to consider because, since it's the smallest possible, it's

also the fastest possible, so any satellite has to be moving slower than the speeds

listed above ... the farther out their orbits are, the slower they're moving.

As one example, if you investigate the region 238,000 miles from the earth, you find

an object orbiting the earth out there which we refer to as "the moon". Its orbital

speed at that distance is only about 37.8 miles (60.8 km) per minute, or 2,265 miles

(3,646 km) per hour, which is why it takes the moon 27-1/2 days to complete

one orbit.

If the moon travelled as fast in its orbit as the imaginary surface-skimming satellite

described earlier, it would orbit the earth approx. every 91 hours instead of only

once a month.

Answer 5

The Earth's velocity in its orbit around the Sun isn't constant; it speeds up near perihelion on January 4, and slows down to aphelion around July 4. But on average, it is about 66,000 miles per hour.

Answer 6

The average orbital velocity of the Earth is equal to 29.78 km/s. This is equal to 66,610.9918 miles per hour.

Answer 7

The speed of the Earth as it revolves around the sun is 18. 5 miles per second, or 66,600 miles per hour. The Earth rotates on its access at a speed of 1,051 miles per hour.

Answer 8

the orbital speed of our planet - Earth is 1 year

Answer 9

Without the actual altitude above mean sea level, this question cannot be answered.

Answer 10

the speed at which a planet moves through its orbit

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