Spectroscopy and orbital analysis of bright bolides observed over the Iberian Peninsula from 2010 to 2012

Madiedo, J. M.; Trigo-Rodríguez, J. M.; Ortiz, J. L.; Castro-Tirado, A. J.; Pastor, S.; Reyes, J. A.; Cabrera-Caño, J.

doi:10.1093/mnras/stt1418

Cited by 6 publications

(4 citation statements)

References 42 publications

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“…; Madiedo et al. ), it might, in practice, be difficult to find and recover meteorites of only a few centimeters in size. Thus, one wonders if some tiny meteorite falls may have shared the fate of Ardón: They may have been recovered, but not reported and may be hidden in some private jewel box, as was Ardón for 83 yr!…”

Section: Discussionmentioning

confidence: 99%

The Ardón L6 ordinary chondrite: A long‐hidden Spanish meteorite fall

Trigo-Rodríguez

Llorca

Weyrauch³

et al. 2014

Meteorit & Planetary Scien

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Abstract-We report and describe an L6 ordinary chondrite fall that occurred in Ard on, Le on province, Spain (longitude 5.5605°W, latitude 42.4364°N) on July 9th, 1931. The 5.5 g single stone was kept hidden for 83 yr by Rosa Gonz alez P erez, at the time an 11 yr old who had observed the fall and had recovered the meteorite. According to various newspaper reports, the event was widely observed in Northern Spain. Ard on is a very well-preserved, fresh, strongly metamorphosed (petrologic type 6), and weakly shocked (S3) ordinary chondrite with well-equilibrated and recrystallized minerals. Ne ratio indicates that preatmospheric Ard on was a relatively large body. The fact that the meteorite was hidden in private hands for 83 yr makes one wonder if other meteorite falls may have experienced the same fate, thus possibly explaining the anomalously low number of falls reported in continental Spain in the 20th century.

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Section: Discussionmentioning

confidence: 99%

The Ardón L6 ordinary chondrite: A long‐hidden Spanish meteorite fall

Trigo-Rodríguez

Llorca

Weyrauch³

et al. 2014

Meteorit & Planetary Scien

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“…A more sensitive CCD spectrograph, having, however, smaller field of view, was used during the Leonid campaign (Jenniskens, 2007). The Spanish Meteor Network uses video cameras to obtain low resolution spectra of bolides (Madiedo et al, 2013a(Madiedo et al, ,b, 2014a.…”

Section: Observation Methodsmentioning

confidence: 99%

Small Near-Earth Asteroids as a Source of Meteorites

Borovička¹,

Spurný²,

Brown³

2015

Asteroids IV

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__________________________________________________________________________Small asteroids intersecting Earth's orbit can deliver extraterrestrial rocks to the Earth, called meteorites. This process is accompanied by a luminous phenomena in the atmosphere, called bolides or fireballs. Observations of bolides provide pre-atmospheric orbits of meteorites, physical and chemical properties of small asteroids, and the flux (i.e. frequency of impacts) of bodies at the Earth in the centimeter to decameter size range. In this chapter we explain the processes occurring during the penetration of cosmic bodies through the atmosphere and review the methods of bolide observations. We compile available data on the fireballs associated with 22 instrumentally observed meteorite falls. Among them are the heterogeneous falls Almahata Sitta (2008 TC 3 ) and Benešov, which revolutionized our view on the structure and composition of small asteroids, the Příbram-Neuschwanstein orbital pair, carbonaceous chondrite meteorites with orbits on the asteroid-comet boundary, and the Chelyabinsk fall, which produced a damaging blast wave. While most meteoroids disrupt into fragments during atmospheric flight, the Carancas meteoroid remained nearly intact and caused a crater-forming explosion on the ground.

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“…In this work, the direct observation of fragments is not available. Since flares are usually thought to be a consequence of sudden fragmentation (Ceplecha et al 1998;Jenniskens & Stenbaek-Nielsen 2004;Trigo-Rodríguez et al 2008;Madiedo et al 2013), the position of flares was used to infer the fragmentation height. By using the flaring heights obtained from the fireball light curve, the fireball velocity, and the atmospheric density from the MSISE model (Picone et al 2002), the dynamic pressures at the points of the flaring were calculated as 10.11 kPa, 36.85 kPa, and 73.49 kPa, respectively.…”

Section: Mechanical and Materials Strengthmentioning

confidence: 99%

“…The mesospheric NFAI was not generated continuously along the whole optical meteor path, but clustered into three patches linked with optical meteor flares. As meteor flares are commonly thought to be caused by meteoroid fragmentation (e.g., Bronshten 1981;Jenniskens & Stenbaek-Nielsen 2004;Trigo-Rodríguez et al 2008;Madiedo et al 2013), we leverage the existing dust grain model approach for meteor light curves (Campbell-Brown & Koschny 2004) as the most likely explanation of mesospheric NFAI. Nanometer-or-larger-sized meteor dust particles could be directly produced through meteoroid fragmentation and dust release at the flaring points and survive without complete evaporation.…”

Section: Introductionmentioning

confidence: 99%

The Spectrum and Orbit of a Fireball Producing Mesospheric Irregularity and Implications for Meteor Mass Deposition

et al. 2023

ApJ

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The physical properties of meteoroids producing meteor plasma non-field-aligned irregularities (NFAI) in the Earth’s atmosphere are poorly known. Here we report a complete picture of a fireball and mesospheric NFAI that it produced for the first time. Simultaneous radar and optical observations were made by the recently completed facility, Meteor and ionospheric Irregularity Observation System. The observations show that the mesospheric NFAI were clustered into three patches where the optical meteor flares took place, instead of being generated continuously along the whole meteor path. It is very likely that nanometer-or-larger-sized dust particles could be directly generated via meteoroid fragmentation at the flaring points and thus promote the generation of NFAI patches. The properties of the parent meteoroid show a chondrite type and a Jupiter family comet orbit, with Na/Mg and Fe/Mg intensity ratios of 1.5 and 1, respectively, photometric mass of about 4 g, and fragmentation strengths of around 10–74 kPa. The results suggest that the direct generation of dust particles, which was previously observed in the atmospheric disintegration of a kiloton-scale meteoroid, could be extended to the much smaller gram-scale meteoroids. Since meteoroids having such characteristics or more fragile material are not unusual, further studies leading to a better understanding of meteor mass deposition in the upper atmosphere, which consider the dust particles directly generated via gram-scale meteoroid fragmentation, are extremely important.

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Spectroscopy and orbital analysis of bright bolides observed over the Iberian Peninsula from 2010 to 2012

Cited by 6 publications

References 42 publications

The Ardón L6 ordinary chondrite: A long‐hidden Spanish meteorite fall

The Ardón L6 ordinary chondrite: A long‐hidden Spanish meteorite fall

Small Near-Earth Asteroids as a Source of Meteorites

The Spectrum and Orbit of a Fireball Producing Mesospheric Irregularity and Implications for Meteor Mass Deposition

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