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Outside the top four, the ranking of all the asteroids is uncertain, as there is a great deal of overlap among the estimates. The largest asteroids with an accurately measured mass, because they have been studied by the probe Dawn, are 1 Ceres with a mass of (939.3 ± 0.5) × 10 18 kg, and 4 Vesta at (259.076 ± 0.001) × 10 18 kg.
3200 Phaethon (/ ˈ f eɪ. ə ˌ θ ɒ n /; previously sometimes spelled Phæton), provisionally designated 1983 TB, is an active [8] Apollo asteroid with an orbit that brings it closer to the Sun than any other named asteroid (though there are numerous unnamed asteroids with smaller perihelia, such as (137924) 2000 BD 19). [9]
In this dramatic illustration, a meteor falls toward Earth from space. A pair of asteroids that rammed into Earth more than 35 million years ago seemingly had no climate impacts, scientists said ...
In the moments before NASA's DART spacecraft slammed into the asteroid Dimorphos in a landmark planetary defense test in 2022, it took high-resolution images of this small celestial object and its ...
It uses images from the Dark Energy Camera (DECam) to search for tails around asteroids and other minor planets. The research team is led by Colin Orion Chandler. [1] [2] [3] As of April 2024 about 8300 volunteers carried out 6.7 million classifications of 430 thousand images. At the time only 60 active asteroids were known and 16 new active ...
Glavin’s team also found compounds rich in nitrogen and ammonia in the samples, suggesting that Bennu was part of a larger asteroid that formed about 4.5 billion years ago in the frigid, distant ...
16 Psyche (/ ˈ s aɪ k iː / SY-kee) is a large M-type asteroid, which was discovered by the Italian astronomer Annibale de Gasparis, on 17 March 1852 and named after the Greek goddess Psyche.