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The size and shape of asteroids vary significantly, ranging from small rubble piles under a kilometer across to Ceres, a dwarf planet almost 1000 km in diameter. A body is classified as a comet, not an asteroid, if it shows a coma (tail) when warmed by solar radiation, although recent observations suggest a continuum between these types of bodies.
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 ...
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 Space Agency said. An asteroid could hit Earth in 2032, NASA ...
Asteroid the size of a 20-story building headed for Earth in 2032, astronomers warn. Anthony Cuthbertson and Julia Musto. February 4, 2025 at 5:31 PM. A large asteroid is headed towards Earth ...
Impact conditions such as asteroid size and speed, but also density and impact angle determine the kinetic energy released in an impact event. The more energy is released, the more damage is likely to occur on the ground due to the environmental effects triggered by the impact.
On 8 January, it came within 7.6 million miles of Earth, roughly 32 times the average distance between Earth and the Moon. The next time it will pass this close again will be in 2087.
Since its formation, the size distribution of the asteroid belt has remained relatively stable; no significant increase or decrease in the typical dimensions of the main-belt asteroids has occurred. [55] The 4:1 orbital resonance with Jupiter, at a radius 2.06 astronomical units (AUs), can be considered the inner boundary of the asteroid belt ...