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On average the distance between the asteroids is about 965,600 km (600,000 miles), [68] [69] although this varies among asteroid families and smaller undetected asteroids might be even closer. The total mass of the asteroid belt is estimated to be 2.39 × 10 21 kg, which is 3% of the mass of the Moon. [ 2 ]
The asteroid and comet belts orbit the Sun from the inner rocky planets into outer parts of the Solar System, interstellar space. [16] [17] [18] An astronomical unit, or AU, is the distance from Earth to the Sun, which is approximately 150 billion meters (93 million miles). [19]
This list includes few examples since there are about 589 asteroids in the asteroid belt with a measured radius between 20 and 49 km. [162] Many thousands of objects of this size range have yet to be discovered in the trans-Neptunian region.
Over 200 asteroids are known to be larger than 100 km, [45] and a survey in the infrared wavelengths has shown that the asteroid belt has between 700,000 and 1.7 million asteroids with a diameter of 1 km or more. [46] The absolute magnitudes of most of the known asteroids are between 11 and 19, with the median at about 16. [47]
First asteroid known to have more than one moon (determined in 2005) 90 Antiope: 80×80: October 1, 1866: Double asteroid with two nearly equal components; its double nature was discovered using adaptive optics in 2000 92 Undina: 126: 1867 July 7: Created in one of the largest asteroid-on-asteroid collisions of the past 100 million years 216 ...
Called a "mini-moon" of sorts by some, it temporarily entered Earth's orbit on Sept. 29 from the Arjuna asteroid belt, which follows a similar orbital path around the sun as the Earth.
Apollo asteroid, Mars-crosser asteroid, aka 2004 JN 13: Near-Earth asteroids between the Main Asteroid Belt and Jupiter's zone of influence: Near-Earth asteroids between Jupiter's and Saturn's zones of influence: Near-Earth asteroids between Saturn's and Uranus' zones of influence: 1999 XS 35: 17.915: Apollo asteroid, Damocloid asteroid, Mars ...
intermediate main-belt (2.5 AU < a < 2.82 AU) outer main-belt (a > 2.82 AU) A plot of inner solar system asteroids and planets as of 2006 May 9, in a manner that exposes the Kirkwood gaps. Similar to the position plot, planets (with trajectories) are orange, Jupiter being the outer most in this view. Various asteroid classes are colour coded ...