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The flux of small near-Earth objects colliding with the Earth
Satellite records of bolide detonations in the atmosphere over the past 8.5 years are reported and it is found that the flux of objects in the 1–10-m size range has the same power-law distribution as bodies with diameters >50 m.
A 500-kiloton airburst over Chelyabinsk and an enhanced hazard from small impactors
A global survey of airbursts of a kiloton or more is performed, and it is found that the number of impactors with diameters of tens of metres may be an order of magnitude higher than estimates based on other techniques, which suggests a non-equilibrium in the near-Earth asteroid population.
The fall, recovery, orbit, and composition of the Tagish Lake meteorite: a new type of carbonaceous chondrite.
The mineralogy, oxygen isotope, and bulk chemical composition of recovered samples of the Tagish Lake meteorite are intermediate between CM and CI meteorites, suggesting that the Tagishes Lake meteoroid may be one of the most primitive solar system materials yet studied.
Photometric Survey of Binary Near-Earth Asteroids
The trajectory, structure and origin of the Chelyabinsk asteroidal impactor
An analysis of selected video records of the Chelyabinsk superbolide of 15 February 2013 found that its orbit was similar to the orbit of the two-kilometre-diameter asteroid 86039, to a degree of statistical significance sufficient to suggest that the two were once part of the same object.
The impact and recovery of asteroid 2008 TC3
A dedicated search along the approach trajectory recovered 47 meteorites, fragments of a single body named Almahata Sitta, with a total mass of 3.95 kg, identifying the asteroid as F class, now firmly linked to dark carbon-rich anomalous ureilites, a material so fragile it was not previously represented in meteorite collections.
Sporadic meteor radiant distributions: orbital survey results
The structure of the sporadic meteor complex is determined from the data in 10 orbital surveys. In addition to the previously known apex, helion, antihelion and northern toroidal sources, we find a…
A meteoroid stream survey using the Canadian Meteor Orbit Radar II: Identification of minor showers using a 3D wavelet transform
Orbital and physical characteristics of meter-scale impactors from airburst observations