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This list contains a selection of objects 50 and 99 km in radius (100 km to 199 km in average diameter). The listed objects currently include most objects in the asteroid belt and moons of the giant planets in this size range, but many newly discovered objects in the outer Solar System are missing, such as those included in the following ...
Except for the "big four" (Ceres, Pallas, Vesta, and Hygiea), asteroids are likely to be broadly similar in appearance, if irregular in shape. 50 km (31 mi) 253 Mathilde is a rubble pile saturated with craters with diameters the size of the asteroid's radius.
The table shows that for bodies in the asteroid albedo range, the typical difference between Bond and geometric albedo is 20% or less, with either quantity capable of being larger. Since the calculated temperature varies as ( 1 − A ) 1 4 {\displaystyle (1-A)^{1 \over 4}} , the dependence is fairly weak for typical asteroid A ≈ p ...
"An asteroid this size impacts Earth on average every few thousand years and could cause severe damage to a local region," the European ... The best modern comparison is the 1908 Tunguska Event ...
By comparison, the asteroid that ended the age of the dinosaur is estimated to be between six and nine miles wide. However, astronomers say the odds of a collision are around 1-in-83.
It measures 130 to 300 feet across, a pebble compared to the asteroid that killed the dinosaurs, ... The size, trajectory, and speed of the asteroid immediately made it a cause of concern.
The identified objects are of many sizes, but much smaller than planets, and, on average, are about one million kilometers (or six hundred thousand miles) apart. This asteroid belt is also called the main asteroid belt or main belt to distinguish it from other asteroid populations in the Solar System. [1]
The mass of 2 Pallas (blue) compared to other large asteroids: 4 Vesta, 10 Hygiea, 704 Interamnia, 15 Eunomia, the remainder of the asteroid belt, and 1 Ceres. The unit of mass is × 10 18 kg. Both Vesta and Pallas have assumed the title of second-largest asteroid from time to time. [ 47 ]