Observatorio Astronomico de La Murta

Molina de Segura, Spain

Observatorio Astronomico de La Murta

Molina de Segura, Spain
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Madiedo J.M.,University of Huelva | Madiedo J.M.,University of Seville | Trigo-Rodriguez J.M.,Institute of Space science CSIC IEEC | Williams I.P.,Queen Mary, University of London | And 6 more authors.
Monthly Notices of the Royal Astronomical Society | Year: 2014

We analyse the likely link between the recently discovered near-Earth object 2012XJ112 and a bright fireball observed over the south of Spain on 2012 December 27. The bolide, with an absolute magnitude of -9 ± 1, was simultaneously imaged during the morning twilight from twometeor stations operated by the SPanish Meteor Network (SPMN). It was also observed by several casual witnesses. The emission spectrum produced during the ablation of the meteoroid in the atmosphere was also recorded. From its analysis, the chemical nature of this particle was inferred. Although our orbital association software identified several potential parent bodies for this meteoroid, the analysis of the evolution of the orbital elements performed with the MERCURY 6 symplectic integrator supports the idea that NEO 2012XJ112 is the source of this meteoroid. The implications of this potential association are discussed here. In particular, the meteoroid bulk chemistry is consistent with a basaltic achondrite, and this emphasizes the importance to deduce from future Earth approaches the reflectance spectrum and taxonomic nature of 2012XJ112. © 2014 The Author. Published by Oxford University Press on behalf of the Royal Astronomical Society.


Madiedo J.M.,University of Huelva | Madiedo J.M.,University of Seville | Trigo-Rodriguez J.M.,Institute Of Ciencies Of Lespai Csic Ieec | Ortiz J.L.,Institute Astrofisica Of Andalucia | And 4 more authors.
Monthly Notices of the Royal Astronomical Society | Year: 2013

We present the analysis of the atmospheric trajectory and orbital data of four bright bolides observed over Spain, one of which is a potential meteorite dropping event. Their absolute magnitude ranges from -10 to -11. Two of these are of sporadic origin, although a Geminid and a Κ-Cygnid fireball are also considered. These eventswere recorded in the framework of the continuous fireball monitoring and spectroscopy campaigns developed by the SPanish Meteor Network (SPMN) between 2010 and 2012. The tensile strength of the parent meteoroids is estimated and the abundances of the main rock-forming elements in these particles are calculated from the emission spectrum obtained for three of these events. This analysis revealed a chondritic nature for these meteoroids. © 2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society.


Madiedo J.M.,University of Seville | Madiedo J.M.,University of Huelva | Trigo-Rodriguez J.M.,Institute Of Ciencies Of Lespai Csic Ieec | Zamorano J.,Complutense University of Madrid | And 13 more authors.
Astronomy and Astrophysics | Year: 2014

On April 13, 2013 a very bright fireball with an absolute magnitude of -13.0 ± 0.5 was recorded over the center of Spain. This sporadic event, which was witnessed by numerous casual observers throughout the whole country, was imaged from seven meteor-observing stations operated by the Spanish Meteor Network (SPMN), and its emission spectrum was also obtained in the framework of our meteor spectroscopy campaign. The atmospheric trajectory of the bolide and the heliocentric orbit of the parent meteoroid are analyzed here. The spectrum reveals a chondritic nature for this particle, which was following a Jupiter family comet orbit before its encounter with the Earth. In addition, the emission spectrum of the meteoric afterglow was recorded during about 0.8 s. The main emission lines appearing in this signal were identified and their evolution with time is also discussed. Afterglow spectra are not abundant in the literature, and these can provide important clues about the physical proceses taking place in meteoric persistent trains. © ESO, 2014.

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