La Puebla de Almoradiel, Spain
La Puebla de Almoradiel, Spain

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Madiedo J.M.,University of Seville | Madiedo J.M.,University of Huelva | Trigo-Rodriguez J.M.,P2 Science | Zamorano J.,Complutense University of Madrid | And 15 more authors.
Monthly Notices of the Royal Astronomical Society | Year: 2013

A superbolide with an estimated absolute magnitude of-20±1was seen on 2012 July 13 over the centre and south of Spain. This extraordinary event, which was witnessed by numerous casual observers, was recorded in the framework of the continuous fireball monitoring and meteor spectroscopy campaign performed by the SPanish Meteor Network (SPMN). Thus, because of optimal weather conditions, the bolide was imaged from 10 meteor observing stations. Here we present the analysis of this magnificent event, which is the brightest fireball ever recorded by our team. The atmospheric trajectory of the bolide and the orbit in the Solar system of the parent meteoroid were obtained. The emission spectrum produced during the ablation of this particle is also discussed.We found that the meteoroid, which was following a Halley Type Comet orbit, was depleted in Na and had a tensile strength one order of magnitude higher than that corresponding to typical cometary materials. By means of orbital analysis tools we have investigated the likely parent body of this particle and the results suggest that the progenitor is a damocloid. The impact area of the hypothetical remnants of the meteoroid is also given and a search for meteorites was performed, but none was found. © 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.


Madiedo J.M.,University of Seville | Madiedo J.M.,University of Huelva | Ortiz J.L.,Institute Astrofisica Of Andalucia | Organero F.,Observatorio Astronomico de La Hita | And 4 more authors.
Astronomy and Astrophysics | Year: 2015

We present the results of our Moon impact flash detection campaigns performed around the maximum activity period of the Perseid meteor shower in 2012 and 2013. Just one flash produced by a Perseid meteoroid was detected in 2012 because of very unfavorable geometric conditions, but 12 flashes were confirmed in 2013. The visual magnitude of the flashes ranged between 6.6 and 9.3. A luminous efficiency of 1.8 × 10-3 has been estimated for meteoroids from this stream. According to this value, impactor masses would range between 1.9 and 190 g. In addition, we propose a criterion for establishing, from a statistical point of view, the likely origin of impact flashes recorded on the lunar surface. © ESO, 2015.

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