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5.43 km per second.

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Which planet revolves very slowly around the sun?

Mercury has the slowest orbital velocity around the sun compared to the other planets in our solar system. Its average orbital speed is about 47.87 km/s.


What is the average orbital speed of Neptune in km-sec?

Neptune spins at a equatorial rate of 2.68 km/sec, or a velocity of 9,660 km/hr (6000 mph).


What is the name for a planet's speed in its orbit?

It is the orbital velocity (speed and direction) or orbital speed (rate of motion). It is usually stated as "average orbital speed" but is actually "mean orbital speed."


The orbital speed of Venus' and Neptune?

According to http://solarsystem.nasa.gov/planets/, Venus has an orbital velocity of 78,341 mph, and Neptune's is 12,253 mph...


Which planet travels around the sun at the lowest speed?

Mercury travels around the sun at the lowest speed compared to other planets in our solar system. Its average orbital speed is about 47.87 km/s.


Which term refers to the speed at which a planet travel in its orbit?

Orbital velocity refers to the speed at which a planet travels in its orbit.


Which planet orbits the Sun slowest?

If you still consider Pluto to be a planet then Pluto would be the slowest to orbit the sun. If you don't believe Pluto is a planet anymore then Neptune would be the slowest planet to orbit our sun.


Which planets are closest in orbital speed?

The orbital speeds are higher when closer to the sun, but slower and more similar as you move out. The two that are closest in speed are Uranus and Neptune. Uranus at 6.8352 km/sec and Neptune at 5.4778 km/sec.


Which planets orbital speed is thirty kilometers per second?

The planet with an orbital speed of around 30 kilometers per second is Earth. Its average orbital speed around the Sun is approximately 29.78 kilometers per second.


What is difference between orbital and spinning speed of a planet?

The orbital speed of a planet is the time it takes to cycle around the sun. The spinning speed of a planet is the time it takes for the planet to rotate on it's axis.


Which planet has the slower orbital speed saturn or jupiter how many kilometers slower?

Saturn has a slower orbital speed than Jupiter. Saturn's average orbital speed is about 9.69 km/s, while Jupiter's average orbital speed is about 13.07 km/s, making Jupiter about 3.38 km/s faster than Saturn.


Which planet moves the most slowly in its orbit?

Of the major planets, Neptune. The speed of planets in their orbits is directly related to their distance from the sun. The farther a planet is from the Sun, the slower its orbital speed.