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The asteroid had a close approach to the Earth on 29 May 2012, approaching to only ~8950 miles (~14,440 km) above the planet's surface. This means 2012 KT 42 came inside the Clarke Belt of geosynchronous satellites. In May 2012, the estimated 5- to 10-metre-wide asteroid ranked #6 on the top 20 list of closest-approaches to Earth.
The extended-belt asteroids were located between the current inner boundary of the asteroid belt and the orbit of Mars with semi-major axis ranging from 1.7 to 2.1 astronomical units (AU). In the current Solar System most orbits in this region are unstable due to the presence of the ν 6 secular resonance . [ 1 ]
2012 BX 34 is a small Aten asteroid that made one of the closest recorded asteroid close approaches of Earth on 27 January 2012. It passed within 0.0004371 AU (65,390 km ; 40,630 mi ) of Earth during its closest approach at 15:25 GMT.
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 ]
367943 Duende (provisional designation 2012 DA 14) is a micro-asteroid and a near-Earth object of the Aten and Atira group, approximately 30 meters (98 ft) in diameter.It was discovered by astronomers of the Astronomical Observatory of Mallorca at its robotic La Sagra Observatory in 2012, and named for the duende, a goblin-like creature from Iberian and Filipino mythology and folklore. [1]
[58] [59] In 2006, a population of comets had been discovered within the asteroid belt beyond the snow line, which may have provided a source of water for Earth's oceans. According to some models, outgassing of water during the Earth's formative period was insufficient to form the oceans, requiring an external source such as a cometary bombardment.
YouTube Interview with David Jewitt (discussion on main-belt comets starts around 9 minutes into video) Impact trigger mechanism diagram by David Jewitt; Comet-like appearance of (596) Scheila; Project T3: Finding Comets in the Asteroid Population; Jewitt, David (2012). "The Active Asteroids". The Astronomical Journal. 143 (3): 66. arXiv: 1112. ...
2012 TC 4 is a tumbling micro-asteroid classified as a bright near-Earth object of the Apollo group, approximately 10 meters (30 feet) in diameter. [ 6 ] [ 7 ] [ 8 ] It was first observed by Pan-STARRS at Haleakala Observatory on the Hawaiian island of Maui , in the United States.