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Traspena
Basic information Name: Traspena
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: Yes, confirmed fall
Year fell: 2021
Country: Spain
Mass:help 527 g
Classification
  history:
Recommended:  L5    [explanation]

This is 1 of 8489 approved meteorites (plus 4 unapproved names) classified as L5.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 1 Oct 2022
Writeuphelp
Writeup from MB 111:

Traspena        42°52.27’N, 7°19.38’W

Galicia, Spain

Confirmed fall: 18 Jan 2021

Classification: Ordinary chondrite (L5)

History: (Manuel Andrade, USC) On January 18, 2021, at 00:18:56.54 UTC, an extremely bright fireball appeared in the night sky of Galiza (NW of Spain). Sonic booms were recorded at four seismic stations and inhabitants of the regions of Ancares, Sarria and Bierzo heard as well a loud sonic boom. This superbolide was instrumentally recorded from the automated observing stations of the Universidade de Santiago de Compostela in Lugo and Santiago de Compostela and these vídeos were astrometrically calibrated by Manuel Andrade. Additionally, seven videos recorded from Caldas de Reis (Pontevedra), Corullón (León), Foncebadón (León), León, Nigrán (Pontevedra), Ponferrada (León), and Toral de los Vados (León) were carefully calibrated by José Á. Docobo and Pedro P. Campo (R.M. Aller Astronomical Observatory, USC). Eloy Peña-Asensio (UAB-CSIC) and Josep M. Trigo-Rodríguez (CSIC-IEEC) participated in the fireball astrometric reduction from the Institute of Space Sciences (CSIC-IEEC). The trajectory reconstruction, the dark flight simulations and the pre-impact heliocentric orbit computation were done by Manuel Andrade (USC). In addition, Mar Tàpia (LEGEF-IEC) performed a seismic analysis using data from four seismic stations (Pontenova, Agolada, Lobios, and Calabor). The meteoroid entered the atmosphere 75 km above the Earth’s surface at a steep angle of about 77° with a velocity of 15 km/s. It stopped ablating at a height of 16 km after decelerating to 2.4 km/s. Three main flares were recorded during the 4.84-second flight and up to nine fragments were counted in the train that formed at the end of the fireball. The initial mass of meteoroid was estimated to be about 2.62 × 10^3 kg. Since the preliminary analysis of the observations of the fireball, made in the hours immediately afterwards, indicated that part of the meteoroid had survived the entry into the atmosphere and thus reached the ground in the SW of the municipality of Baralla, a search team was organized, consisting mainly of members of the Department of Applied Mathematics of the Campus of Lugo (USC), located at only 20 km from the fall zone. Despite the nationwide shutdown due to the COVID-19 pandemic, we obtained a special permission from the USC that allowed us to conduct a large number of search days in the weeks following the event. Finally, a fusion-crusted stone weighing 527 g was found by chance on March 18, 2021, by Jesús Á. Farelo in a meadow where he usually takes his cattle to graze, in the Formigueiro place, very close to the village of Traspena, in the parish of Covas (municipality of Baralla, province of Lugo).

Physical characteristics: An only meteorite with a total mass of 527 g (with a rounded brick shape of approximately 9 × 7 × 5 cm) was recovered just two months after the fireball event. There was no traces of impact except for a small nick in one corner. This is a single stone coated by black fusion crust and exhibiting several thumb-sized regmaglyphs.

Petrography: (J. Llorca, UPC, J. M. Trigo-Rodríguez, CSIC-IEEC, and J. García-Guinea, MNCN) Thin section examination shows fairly delineated chondrules set in a recrystallized groundmass. Plagioclase grains with sizes 5-40 µm. FeNi-metal, troilite and chromite observed throughout.

Geochemistry: (Jordi Llorca, UPC, and Marc Campeny, MCNB) Olivine Fa25.5±0.6, Fe/Mn = 48.3±2.8, N = 29; low-Ca pyroxene Fs21.3±0.5Wo1.5±0.7, N = 28. Magnetic susceptibility (V. Villasante-Marcos, IGN) is log χ (× 10-9 m3/kg) = 4.89.

Classification: Ordinary chondrite (L5).

Specimens: Three sections were removed from the middle part of the only recovered meteorite to be analyzed and distributed in the following way: 29 g (MNCN), 24 g (CSIC-IEEC), and 18 g (UPC). The main remaining fragment weighs 202 g and shows the most characteristic face with many thumb-sized regmaglyphs. This type specimen was given by the finder to the Museo de Historia Natural of the Universidade de Santiago de Compostela (MHNUSC) to be preserved. The second largest fragment (182 g) is deposited in the local council of Baralla.

Data from:
  MB111
  Table 0
  Line 0:
State/Prov/County:Galicia
Origin or pseudonym:meadow
Date:18 Jan 2021
Latitude:42°52.27'N
Longitude:7°19.38'W
Mass (g):527
Pieces:1
Class:L5
Shock stage:S3
Weathering grade:W0
Fayalite (mol%):25.5±0.6 (N=29)
Ferrosilite (mol%):21.3±0.5 (N=28)
Wollastonite (mol%):1.5±0.7 (N=28)
Magnetic suscept.:4.89
Classifier:J. Llorca (UPC) and J. Garci­a-Guinea (MNCN)
Type spec mass (g):202; 29; 24; 18
Type spec location:MHNUSC; MNCN; CSIC-IEEC; UPC
Main mass:MHNUSC
Finder:Jesus Ángel Farelo
Comments:Submitted by Manuel Andrade (Universidade de Santiago de Compostela)
Institutions
   and collections
MNCN: Museo Nacional de Ciencias Naturales, Madrid José Gutiérrez Abascal, 2 28006 Madrid (España) , Spain; Website (institutional address; updated 12 Feb 2022)
UPC: Institut de Tècniques Energètiques, Universitat Politècnica de Catalunya Diagonal 647, ed. ETSEIB, 08028 Barcelona, Spain, Spain (institutional address; updated 3 May 2015)
CSIC-IEEC: Institute of Space Sciences (CSIC-IEEC), Campus UAB, Facultat de Ciències, Torre C-5 Parells, 2ª planta, E-08193 Bellaterra, Barcelona, Spain; Website (institutional address; updated 19 Dec 2015)
MCNB: Museu de Ciències Naturals de Barcelona Parc del Fòrum Plaça Leonardo da Vinci, 4-5 08019 Barcelona, Spain; Website (institutional address; updated 31 Aug 2019)
MHNUSC: Natural History Museum of the University of Santiago de Compostela, Spain; Website (institutional address; updated 20 Jun 2022)
Catalogs:
References: Published in Meteoritical Bulletin, no. 111, in preparation (2022)
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Geography:

Spain
Coordinates:
     Recommended::   (42° 52' 16"N, 7° 19' 23"W)

Statistics:
     This is the only approved meteorite from Galicia, Spain
     This is 1 of 33 approved meteorites from Spain (plus 10 unapproved names)
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