# What is the formula for orbital period?

Formula: P2=ka3 where: P = period of the orbit, measured in units of time. a = average distance of the object, measured in units of distance.

## How is Earth’s orbital radius calculated?

Kepler’s Third law can be used to determine the orbital radius of the planet if the mass of the orbiting star is known (R3=T2−Mstar/Msun, the radius is in AU and the period is in earth years).

## How do you calculate the eccentricity of Earth’s orbit?

The formula to determine the eccentricity of an ellipse is the distance between foci divided by the length of the major axis.

## How do you calculate the speed of Earth’s orbit?

Since speed is equal to the distance traveled over the time taken, Earth’s speed is calculated by dividing 584 million miles (940 million km) by 365.25 days and dividing that result by 24 hours to get miles per hour or km per hour.

## What is Kepler’s third law formula?

If the size of the orbit (a) is expressed in astronomical units (1 AU equals the average distance between the Earth and Sun) and the period (P) is measured in years, then Kepler’s Third Law says P2 = a3.

## What is the radius of orbit?

r= 0.529 x 10 8 x n2 cm. The value of ‘r’ for first orbit is called Bohr radius.

## What is the radius of geostationary orbit?

A geostationary equatorial orbit (GEO) is a circular geosynchronous orbit in the plane of the Earth’s equator with a radius of approximately 42,164 km (26,199 mi) (measured from the center of the Earth). A satellite in such an orbit is at an altitude of approximately 35,786 km (22,236 mi) above mean sea level.

## What is the value of G?

In the first equation above, g is referred to as the acceleration of gravity. Its value is 9.8 m/s2 on Earth. That is to say, the acceleration of gravity on the surface of the earth at sea level is 9.8 m/s2. … There are slight variations in the value of g about earth’s surface.

## How are orbits calculated?

The orbit formula, r = ( h 2 / μ ) / ( 1 + e cos θ ) , gives the position of body m2 in its orbit around m1 as a function of the true anomaly.

## What is the Earth’s eccentricity?

The present eccentricity of Earth is e ≈ 0.01671. In the past, it has varied between 0 and ∼0.06. The eccentricity value can be used to compute the difference in the distance from Earth to the Sun between their closest and furthest approaches (perihelion and aphelion); presently, this amounts to 2e ≈ 3.3%.

## What is an eccentricity cycle?

Eccentricity describes the degree of variation of the Earth’s orbit around the Sun from circular to more elliptical. Eccentricity has two main periodicities, one cycle with an average of ~100,000 years and a longer cycle with a periodicity of ~413,000 years.

## At what speed do satellites orbit the earth?

about 7,000 mph To maintain an orbit that is 22,223 miles (35,786 km) above Earth, the satellite must orbit at a speed of about 7,000 mph (11,300 kph). That orbital speed and distance permits the satellite to make one revolution in 24 hours.

## What if Earth stopped spinning?

If the Earth were to stop spinning on its axis, gradually the oceans would migrate towards the poles from the equator. … You could travel around the Earth on the equator and stay entirely on dry land—ignoring the freezing cold on the night side, and the searing heat on the day side.

## How fast is the Milky Way moving?

130 miles per second When it comes to galaxies, how fast is fast? The Milky Way, an average spiral galaxy, spins at a speed of 130 miles per second (210 km/sec) in our Sun’s neighborhood. New research has found that the most massive spiral galaxies spin faster than expected.

## What is Kepler’s third law called?

Kepler’s third law – sometimes referred to as the law of harmonies – compares the orbital period and radius of orbit of a planet to those of other planets.

## Who was Brahe’s most famous student?

Brahe’s Most Famous Student The two could not have been more different, both personally and professionally. Brahe was a nobleman, and Kepler was from a family who barely had enough money to eat.

## What is the hottest planet?

Venus Planetary surface temperatures tend to get colder the farther a planet is from the Sun. Venus is the exception, as its proximity to the Sun and dense atmosphere make it our solar system’s hottest planet.

## Can humans live on Mars?

Human survival on Mars would require living in artificial Mars habitats with complex life-support systems. One key aspect of this would be water processing systems. Being made mainly of water, a human being would die in a matter of days without it.

## Does Mars have oxygen?

Mars’ atmosphere is dominated by carbon dioxide (CO₂) at a concentration of 96%. Oxygen is only 0.13%, compared with 21% in Earth’s atmosphere. … The waste product is carbon monoxide, which is vented to the Martian atmosphere.

## What is the formula for radius of Bohr’s orbit?

The allowed electron orbits in hydrogen have the radii shown. These radii were first calculated by Bohr and are given by the equation rn=n2ZaB r n = n 2 Z a B . The lowest orbit has the experimentally verified diameter of a hydrogen atom.

## What is the radius of 4th Bohr’s orbit?

The radius of the fourth orbit of hydrogen is 0.85 nm .

## What is K in kZe2 r2?

The attractive Coulomb force F = kZe2/r2, where k = (4peo)-1 = 9 x 109 Nm2/C2, balances mev2/r, which is the mass of the electron, me = 9.1×10-31kg, times the required acceleration to the center, v2/r.

## How many satellites are in geostationary orbit?

According to Satellite Signals, there are 402 satellites in geosynchronous orbit. At geosynchronous orbit, the “ring” around Earth can accommodate a number of satellites — 1,800 altogether, according to one analysis by Lawrence Roberts, published in the Berkeley Technology Law Review.

## What is difference between geostationary and geosynchronous orbit?

While geosynchronous satellites can have any inclination, the key difference to geostationary orbit is the fact that they lie on the same plane as the equator. Geostationary orbits fall in the same category as geosynchronous orbits, but it’s parked over the equator.

## What is the height of geostationary orbit?

35,786 km A geostationary satellite is in a geostationary orbit, which can only be achieved at an altitude very close to 35,786 km (22,236 m) and keeps the satellite fixed over one longitude at the equator. The satellite appears motionless at a fixed position in the sky to ground observers.

## How do I calculate G?

G is the universal gravitational constant, G = 6.674 x 10 11 m3 kg 1 s 2. … The Table Below Shows the Value of g at Various Locations from Earth’s Center.

Location Distance from Earth’s Center(m) Value of g (m/s2)
10000 km above surface 1.64 x 107 m 1.49
50000 km above surface 5.64 x 107 m 0.13

## What is value of G’on moon?

approximately 1.625 m/s2 The acceleration due to gravity on the surface of the Moon is approximately 1.625 m/s2, about 16.6% that on Earth’s surface or 0.166 ɡ.

## What is the G in physics?

The universal gravitational constant (G) relates the magnitude of the gravitational attractive force between two bodies to their masses and the distance between them. Its value is extremely difficult to measure experimentally.