ANGHEL, S; DROLSHAGEN, E; OTT, T; BIRLAN, M; COLAS, F; NEDELCU, D; KOSCHNY, D; ZANDA, B; BOULEY, S; JEANNE, S; MALGOYRE, A; BLANPAIN, C; GATTACCECA, J; JORDA, L; LECUBIN, J; RAULT, J; VAUBAILLON, J; VERNAZZA, P; HUESO, R; PEÑA-ASENSIO, E; RIBAS, S; RIMOLA, A; SÁNCHEZ-LAVEGA, A; TAPIA, M; TRIGO-RODRIGUEZ, J; CAUHAPE, P; DAVADAN, C; DUPOUY, P; HERPIN, M; ROUSSEU, D; TREGON, B

doi:10.1093/mnras/stab2968

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ANGHEL, S
Astronomical Institute of the Romanian Academy
Institut de Mécanique Céleste et de Calcul des Ephémérides [IMCCE]
University of Bucharest [UniBuc]

DROLSHAGEN, E
University of Oldenburg

OTT, T
University of Oldenburg

ANGHEL, S
Astronomical Institute of the Romanian Academy
Institut de Mécanique Céleste et de Calcul des Ephémérides [IMCCE]
University of Bucharest [UniBuc]

DROLSHAGEN, E
University of Oldenburg

OTT, T
University of Oldenburg

BIRLAN, M
Astronomical Institute of the Romanian Academy
Institut de Mécanique Céleste et de Calcul des Ephémérides [IMCCE]

COLAS, F
Institut de Mécanique Céleste et de Calcul des Ephémérides [IMCCE]

NEDELCU, D
Astronomical Institute of the Romanian Academy
Institut de Mécanique Céleste et de Calcul des Ephémérides [IMCCE]

KOSCHNY, D
Agence Spatiale Européenne = European Space Agency [ESA]

ZANDA, B
Institut de Mécanique Céleste et de Calcul des Ephémérides [IMCCE]
Cosmochimie [IMPMC] [IMPMC_COSMO]

BOULEY, S
Institut de Mécanique Céleste et de Calcul des Ephémérides [IMCCE]
Géosciences Paris Saclay [GEOPS]

JEANNE, S
Institut de Mécanique Céleste et de Calcul des Ephémérides [IMCCE]

MALGOYRE, A
Institut Pythéas [OSU PYTHEAS]

BLANPAIN, C
Institut Pythéas [OSU PYTHEAS]

GATTACCECA, J
Centre Européen de Recherche et d'Enseignement des Géosciences de l'Environnement [CEREGE]

JORDA, L
Laboratoire d'Astrophysique de Marseille [LAM]

LECUBIN, J
Institut Pythéas [OSU PYTHEAS]

RAULT, J
Institut de Mécanique Céleste et de Calcul des Ephémérides [IMCCE]

VAUBAILLON, J
Institut de Mécanique Céleste et de Calcul des Ephémérides [IMCCE]

VERNAZZA, P
Laboratoire d'Astrophysique de Marseille [LAM]

HUESO, R
Escuela de Ingeniería de Bilbao

PEÑA-ASENSIO, E
Universitat Autònoma de Barcelona = Autonomous University of Barcelona = Universidad Autónoma de Barcelona [UAB]

RIBAS, S
Institut de Ciencies del Cosmos [ICCUB]

RIMOLA, A
Universitat Autònoma de Barcelona = Autonomous University of Barcelona = Universidad Autónoma de Barcelona [UAB]

SÁNCHEZ-LAVEGA, A
Escuela de Ingeniería de Bilbao
Universidad del País Vasco [Espainia] / Euskal Herriko Unibertsitatea [España] = University of the Basque Country [Spain] = Université du pays basque [Espagne] [UPV / EHU]

TAPIA, M
Institut d'Estudis Catalans

TRIGO-RODRIGUEZ, J
Facultat de Ciències

CAUHAPE, P
Etablissement public des stations d'altitude [EPSA]

DAVADAN, C
Académie des sciences [Paris, France]

DUPOUY, P
Observatoire de Dax

HERPIN, M
Etablissement public des stations d'altitude [EPSA]

ROUSSEU, D
Etablissement public des stations d'altitude [EPSA]

TREGON, B
Laboratoire Ondes et Matière d'Aquitaine [LOMA]

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Monthly Notices of the Royal Astronomical Society. 2021-10

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Abstract The increase in detector sensitivity and availability in the past three decades has allowed us to derive knowledge of the meteoroid flux and impact energy into the Earth’s atmosphere. We present the multi-instrument detected 22 December 2018 fireball over Western Pyrenees, and compare several techniques aiming to obtain a reliable method to be used when measuring impacts of similar scale. From trajectory data alone, we found a bulk density of 3.5 g/cm3 to be the most likely value for the Pyrenean meteoroid. This allowed to further constrain the dynamic mass, which translated into a kinetic energy of 1 ton TNT (4.184 · 109 J). For the second energy derivation, via the fireball’s corrected optical radiation, we obtained a more accurate empirical relation measuring well studied bolides . The result approximates to 1.1 ton TNT, which is notably close to the nominal dynamic result, and agrees with the lower margin of the seismic-based energy estimation, yet way lower than the infrasound estimate. Based on the relation derived in this study, we consider the nominal estimate from both the dynamic and photometric methods to be the most accurate value of deposited energy (1 ton TNT). We show that the combination of these two methods can be used to infer the meteoroid density. Among the methods presented in this paper, we found that the optical energy is the most reliable predictor of impact energy near the ton TNT-scale.< Réduire

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Energy signature of ton TNT-class impacts: analysis of the 22 December 2018 fireball over Western Pyrenees

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