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dc.contributor.authorTrigo Rodríguez, Josep María
dc.contributor.authorLyytinen, E.
dc.contributor.authorJones, D. C.
dc.contributor.authorMadiedo Gil, José María 
dc.contributor.authorCastro Tirado, Alberto J.
dc.contributor.authorWilliams, I. P.
dc.contributor.authorLlorca, Jordi
dc.contributor.authorVítek, Stanislav
dc.contributor.authorJelinek, M.
dc.contributor.authorTroughton, Blanca
dc.contributor.authorGálvez, Francisco
dc.identifier.citationTrigo Rodríguez, J.M., Lyytinen, E., Jones, D. C., Madiedo Gil, J.M., Castro Tirado, Alberto J., Williams, I. P., Llorca, J., Vítek, S., Jelinek, M., Troughton, B., Gálvez, F.: "Asteroid 2002NY40 as a source of meteorite-dropping bolides". Monthly Notices of the Royal Astronomical Society. Vol. 382, n. 4, pág. 1933-1939, (2007). ISSN 0035-8711
dc.identifier.issn1365-2966 (electrónico)
dc.description.abstractThe existence of asteroidal meteoroid streams capable of producing meteorite-dropping bolides has long being invoked, but evidence is scarce. Recent modelling of previously reported associations suggests that the time-scales to keep the orbital coherence of these streams producing meteorites are too short. We present an unequivocal association between near earth object (NEO) 2002NY40 and at least one bright fireball detected over Finland in 2006 August. Another two additional fireballs recorded from Spain and Finland seem to be related, together producing a fireball-producing stream (β Aquarids). On the basis of historical data, the 2006 finding suggests the existence of a meteoroid complex capable of producing meteorites. Taking into account present time-scales for orbital decoherence, if 2002NY40 has large meteoroids associated with it, such behaviour would be the consequence of a relatively recent asteroidal fragmentation. Supporting our claim, the heliocentric orbits of two recently discovered NEOs, 2004NL8 and 2002NY40, were found to exhibit a good similarity to each other and also to the orbits of the three bolides. The fireball spectra of the two Finish bolides showed that the chemical abundances of these objects are consistent with the main elements found in chondrites. This result is consistent with the probable Low iron, Low metal (LL) chondritic mineralogy of asteroid 2002NY40. Consequently, this asteroid may be delivering LL chondrites to the Earth. Additional fireball reports found in the literature suggest that the associated β Aquarid complex may have been delivering meteorites to the Earth during, at least, the last millennium.en_US
dc.publisherOxford University Pressen_US
dc.rightsAtribución-NoComercial-SinDerivadas 3.0 España*
dc.subject.otherMinor planetsen_US
dc.titleAsteroid 2002NY40 as a source of meteorite-dropping bolidesen_US

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