The crater produced was between 180–200 km in diameter ( Hildebrand et al. This took place about 65.5 million years ago ( Smit 1980 Alvarez et al. The biggest cataclysmic event, that highly influences life on Earth, is considered the impact of an asteroid in Chicxulub, Mexico. In the Earth Impactors Database 1 there are 190 confirmed impact structures. Meteoroids, asteroids, and comets have been permanently interacting with Earth during its existence. Several other parent bodies were also identified among the asteroids: 2003UV11, 2003WP21, 2004TG1, and 2005TF50 ( Porubčan et al. For the Taurids Complex the parent body is P/Encke ( Whipple & El-Din Hamid 1952 Wiegert et al. The Geminids meteor shower is associated with asteroid (3200)Phaethon ( Whipple 1983). The Quadrantides meteor shower is associated with the comet C/1490Y1 and the asteroid 2003EH1 ( Jenniskens 2004 Williams et al. It is becoming evident that there is a direct relation between asteroids and meteor showers (see Jopek & Williams 2013, and all references herein). The fragments are called meteoroids, and are in the size range 10 μm to 1 m ( Rubin & Grossman 2010). The processes which produce these fragments are: ejection and disintegration at impacts, rotational instabilities, electrostatic repulsion, radiation pressure, dehydration stresses and thermal fracture, and sublimation of ice ( Jewitt et al. When an asteroid revolves around the Sun, it could leave fragments of matter behind it. (2015) found evidence of activity on several asteroids. (1989) showed that an asteroid could be an extinct comet while Jewitt et al. Physical studies of asteroids also reinforced this view that asteroids could be associated with meteoroid streams. Since then, many more associations have been established, based on orbital similarity ( Porubčan et al. This prediction was confirmed in 1872 and the relationship comet-meteor shower was largely accepted (for an account of these early developments, see Williams 2011).Ĭlube & Napier (1984) pointed out that several asteroids had similar orbits to the Taurid stream. Schiaparelli (1867) identified the first pairing of the Perseid meteor shower and comet 109P/Swift-Tuttlle, and Weiss (1868) predicted a large storm of Andromedids meteor shower associated to the comet 3D/Biela.

It is now generally accepted that comets can produce meteoroid stream that can be observed on Earth as meteor showers as suggested by Daniel Kirkwood in 1861. Key words: meteorites, meteors, meteoroids / minor planets, asteroids: general Asteroid 2007LW19 which is a fast rotator and most probably has monolithic structure and so its physical characteristic does not support the association found based on the dynamical criteria. These objects have low albedo, therefore can be primitive objects. Notable finds are: binary asteroid 2000UG11 associated with Andromedids (AND), while the tumbling asteroid (4179)Toutatis could be associated with October Capricornids (OCC). 206 near-Earth asteroids (NEAs) were associated as possible parent bodies with 28 meteor showers, according to at least two of the criterion used. Finally, we analyzed the physical properties and the orbital stability (in the Lyapunov time sense) of the candidates as well as their possible relationship with meteorites. The identification was carried out by evaluating several well known D-criteria metrics, the orbits being taken from the IAU Meteor Data Center database and from IAU Minor Planet Center. The aim of this work is to identify the asteroids that can produce or re-populate meteoroid streams by determining the similarity of their orbits and orbital evolution over 10 000 yr. The discoveries of active asteroids and extinct comets open a new view of the relation between these objects as possible parent bodies at the origin of meteor showers.Īims. Meteor showers are produced when Earth intersects these streams of matter. Meteoroid streams are fragments of matter produced by comets or asteroids which intersects the orbit of Earth. Nedelcu 3 ,1ġ IMCCE, Paris Observatory, 77 avenue Denfert-Rochereau, 75014 Paris Cedex, FranceĮ-mail: Institute of Space Science (ISS), 409, Atomistilor Street, 077125 Magurele, Ilfov, Romaniaģ Astronomical Institute of Romanian Academy, 5, Cutitul de Argint Street, 040557 Bucharest, RomaniaĤ Faculty of Physics, Bucharest University, 405, Atomistilor Street, 077125 Magurele, Ilfov, RomaniaĬontext.

Astronomical objects: linking to databasesī.

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Meteorite vs meteoroid