Not that big, as asteroids and moons go. Rock and ice are fairly dense, so an object just 10 or 20 kilometers in diameter has a mass in the trillions of tons or trillions of tonnes (1015 kg).
The asteroid moon Petit Prince, about 13 kilometers (8 mi) in diameter, orbits the asteroid Eugenia and weighs about 1.2 trillion tonnes. The smaller rocky Martian moon Deimos, averaging 12.5 kilometers in width, weighs about 1.48 trillion tonnes.
The icy Saturn moons Pan and Atlas are about 5 and 6 trillion tons each. Pan is oblong in shape with dimensions 35 x 32 x 21 km.
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Forecasting the End - 2013 Asteroid 1-4 was released on: USA: 4 April 2013
Wealthiest nations in Europe are 1.Germany - $3.352 trillion 2.France - $2.676 trillion 3.Great Britain - $2.183 trillion
An asteroid or meteor that would cause climatic change, about 1 in 600,000 to 1 in 10,000,000.
A ton isn't a measure of height. It's a measure of weight. 1 ton is equivalent to 2,000 pounds
The number 1 trillion trillion can represent two different numbers, because there are two scales in use.The short scale is used in the US, while the long scale is still employed for some uses in the UK, and elsewhere.In the UK the "old term" is rarely used now.The number 6 trillion trillion (short scale) is 1 x 1024, or 1 septillion, with 24 zeros.The long scale assigns number names by millions, not thousands, so 1 trillion trillionis 1 million, million, million; million, million, million or 1 x 1036 with 36 zeros.