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First asteroid discovered 5 Astraea: 117: December 8, 1845: First asteroid discovered after original four (38 years later) 20 Massalia: 136: September 19, 1852: First asteroid named after city: 45 Eugenia: 202: June 27, 1857: First asteroid named after living person: 87 Sylvia: 261: May 16, 1866: First asteroid known to have more than one moon ...
2015 TC 25 is a near-Earth asteroid, and at only 6 feet (1.8 meters) across and absolute magnitude 29.34 mag, it is thought to be the third smallest asteroid observed over multiple years, after 2021 GM 1 with absolute magnitude 30.4 and 2006 RH 120 with absolute magnitude 29.5. The asteroid is notable for reflecting about 60% of the light that ...
During the flyby, the Lucy spacecraft discovered that Dinkinesh has a contact-binary natural satellite, named Selam, which is 220 meters (720 ft) in diameter. Dinkinesh is the smallest main-belt asteroid explored by spacecraft yet, though some smaller near-Earth asteroids have also been explored.
A meteor that exploded in a spectacular fireball over Niagara Falls in 2022 was the smallest asteroid ever measured, a new study has found. The asteroid, spotted by astronomers just hours before ...
Ceres (minor-planet designation: 1 Ceres) is a dwarf planet in the middle main asteroid belt between the orbits of Mars and Jupiter.It was the first known asteroid, discovered on 1 January 1801 by Giuseppe Piazzi at Palermo Astronomical Observatory in Sicily, and announced as a new planet.
Originally classified as comet C/2017 U1, it was later reclassified as asteroid A/2017 U1 due to the absence of a coma. Once it was unambiguously identified as coming from outside the Solar System, a new designation was created: I, for Interstellar object. As the first object so identified, ʻOumuamua was designated 1I, with rules for the ...
“We knew this was going to be the smallest main belt asteroid ever seen up close,” said Keith Noll, Lucy project scientist from NASA’s Goddard Space Flight Center in Greenbelt, Maryland, in ...
1991 BA is approximately 5 to 10 meters (15 to 30 ft) in diameter and is listed on the Sentry Risk Table. [4] It follows a highly eccentric (0.68), low-inclination (2.0°) orbit of 3.3 years duration, ranging between 0.71 and 3.7 AU from the Sun. 1991 BA was, at the time of its discovery, the smallest and closest confirmed asteroid outside of Earth's atmosphere.