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  • Apollo Asteroids - an overview | ScienceDirect Topics
    Articles commonly refer to the abundance of gold or platinum-group metals (PGMs) as asteroidal resources worth mining and returning to Earth This may be an attractive short-term diversion, but the quantity of these metals resident in the NEA swarm is so large that exploiting even a tiny proportion of the available supply would overwhelm Earth
  • On asteroidal sets in chordal graphs - ScienceDirect
    The asteroidal number of G is the cardinality of a largest asteroidal set of G Many algorithmic and structural properties of graphs with bounded asteroidal number have been obtained [3], [9] The problem of determining the asteroidal number of a graph is NP-complete even when restricted to triangle-free 3-connected 3-regular planar graphs [8]
  • Mineralogy and spectroscopy (visible near infrared and Fourier . . .
    The majority of alteration seems to have occurred within the asteroidal parent body The Mukundpura CM2 thus preserves a unique combination of relict chondrules and highly aqueous altered variegated matrix clasts, although the surface mineralogy resembles the C-type asteroids recently probed by OSIRIS-REx and Hayabusa-2 missions
  • Water delivery to the Moon by asteroidal and cometary impacts
    Importance of asteroidal delivery of water to the Moon depends on the frequency of the impacts of water-rich objects with relatively low velocities According to the Catalogue of Meteorites (Grady, 2000) the falls of CI, CM, and CR meteorites on the Earth make up about 3% of the total falls of stony bodies This number may be smaller than the
  • Asteroidal impacts and the origin of terrestrial and lunar volatiles
    Impacts on Earth lead to the volatilization and melting of the impactor Impacts on the Moon lead to the fragmentation of the impactor Volatiles in the Earth represent the accretion of ∼4% of CI-chondrites Earth’s core formed 30 Ma after SS, the late veneer arriving later than 130 Ma Up to 1% water has been added to the Earth, whereas the Moon is significantly drier
  • Enstatite achondrite meteorites (aubrites) and the histories of their . . .
    The mineralogical, petrological, chemical, and isotopic compositions of asteroidal meteorites allow assignment of meteorites to an origin from one, or more, common parent body(ies) The rocks of the enstatite meteorite clan appear to represent samples from at least five different parent bodies
  • Experimental partial melting of the Allende (CV) and Murchison (CM . . .
    The compositions of experimental partial melts from the Allende (CV) and anhydrous Murchison (CM) chondrites depend strongly on ambient oxygen fugacit…
  • H and Cl isotope characteristics of indigenous and late hydrothermal . . .
    Apatite in ordinary chondrites is also generally OH-poor and Cl-rich and thought to have formed from metasomatic reactions between pre-existing merrillite and Cl-rich fluids Fluid circulations and metasomatism on asteroidal bodies occurring several tens of million years after their accretion thus seem to be fairly common in Solar System objects
  • Induced matchings in asteroidal triple-free graphs
    An asteroidal triple (AT) of a graph is a set of three vertices such that any two of them are joined by a path avoiding the closed neighborhood of the third A graph is called asteroidal triple-free (AT-free) if it does not contain an AT Lekkerkerker and Boland [21] first introduced the concept of asteroidal triples to characterize interval
  • Asteroidal triples of moplexes - ScienceDirect
    A graph G has an asteroidal triple of vertices iff it has an asteroidal triple of moplexes Proof ⇐: Let {X,Y,Z} be an asteroidal triple of moplexes of graph G, let x be in X, y be in Y, z be in Z We claim that {x,y,z} is an asteroidal triple of vertices Let μ be a path from Y to Z which does not see X, let y′∈Y and z′∈Z be the





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