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- M-type_asteroid abstract "M-type asteroids are asteroids of partially known composition; they are moderately bright (albedo 0.1–0.2). Some, but not all, are made of nickel–iron, either pure or mixed with small amounts of stone. These are thought to be pieces of the metallic core of differentiated asteroids that were fragmented by impacts, and are thought to be the source of iron meteorites. M-type asteroids are the third most common asteroid type.There are also M-types whose composition is uncertain. For example, 22 Kalliope has an accurately known density that is far too low for a solid metallic object or even a metal rubble pile: a rubble pile of iron-nickel metal would need about 70% porosity which is inconsistent with packing considerations. 22 Kalliope and 21 Lutetia have features in their spectra which appear to indicate the presence of hydration minerals and silicates, anomalously low radar albedos inconsistent with a metallic surface, as well as characteristics more in common with C-type asteroids. A variety of other M-type asteroids do not fit well into a metallic body picture.M-type spectra are flat to reddish and usually devoid of large features, although subtle absorption features longward of 0.75 µm and shortward of 0.55 µm are sometimes present.".
- M-type_asteroid wikiPageID "532254".
- M-type_asteroid wikiPageRevisionID "540242942".
- M-type_asteroid hasPhotoCollection M-type_asteroid.
- M-type_asteroid subject Category:Asteroid_spectral_classes.
- M-type_asteroid subject Category:M-type_asteroids.
- M-type_asteroid subject Category:X-type_asteroids.
- M-type_asteroid type Asteroid109208702.
- M-type_asteroid type CelestialBody109239740.
- M-type_asteroid type M-typeAsteroids.
- M-type_asteroid type MinorPlanet109355623.
- M-type_asteroid type NaturalObject100019128.
- M-type_asteroid type Object100002684.
- M-type_asteroid type PhysicalEntity100001930.
- M-type_asteroid type Whole100003553.
- M-type_asteroid type X-typeAsteroids.
- M-type_asteroid comment "M-type asteroids are asteroids of partially known composition; they are moderately bright (albedo 0.1–0.2). Some, but not all, are made of nickel–iron, either pure or mixed with small amounts of stone. These are thought to be pieces of the metallic core of differentiated asteroids that were fragmented by impacts, and are thought to be the source of iron meteorites. M-type asteroids are the third most common asteroid type.There are also M-types whose composition is uncertain.".
- M-type_asteroid label "Asteroide di tipo M".
- M-type_asteroid label "Astéroïde de type M".
- M-type_asteroid label "M-type asteroid".
- M-type_asteroid label "M-型小行星".
- M-type_asteroid label "M型小惑星".
- M-type_asteroid label "Planetoida klasy M".
- M-type_asteroid label "Астероид класса M".
- M-type_asteroid sameAs Astéroïde_de_type_M.
- M-type_asteroid sameAs Asteroide_di_tipo_M.
- M-type_asteroid sameAs M型小惑星.
- M-type_asteroid sameAs Planetoida_klasy_M.
- M-type_asteroid sameAs Asteroide_tipo_M.
- M-type_asteroid sameAs m.02m9mj.
- M-type_asteroid sameAs Q847310.
- M-type_asteroid sameAs Q847310.
- M-type_asteroid sameAs M-type_asteroid.
- M-type_asteroid wasDerivedFrom M-type_asteroid?oldid=540242942.
- M-type_asteroid isPrimaryTopicOf M-type_asteroid.