[meteorite-list] A Heads-Up: Another important article on Carancas in MAPS 44-12, 2009

[tett]

Bernd,

It is GOOD to have you back on the list!

Mike



bernd.pauli at paulinet.de wrote:
> TANCREDI G. et al. (2009) A meteorite crater on Earth formed
> on September 15, 2007: The Carancas hypervelocity impact
> (MAPS 44-12, 2009, pp. 1967-1984).
>
> Some of the key results the authors present:
>
> - initial mass 7-12 metric tons
> - initial diameter 1.6-2 meters
> - initial velocity 12-17 km/s
> - initial kinetic energy 0.12-0.41 kT TNT
> - trajectory roughly east-west
> - height above the horizon 45-60°
> - orbit of known near-Earth asteroids
> - impact time 16:40:14.4 UT
> - crater dimensions: 13.5 m (rim to rim)
> - depth to diameter ratio ca. 0.2 (typical of impact craters)
> - meteorites collected inside and outside the crater
> - classification H4-5
> - peak pressures at impact over several GPa
> - impact velocity on the ground > ca. 3 km/s but < 6 km/s
> - hypervelocity impact event (impact speed larger than the
>   speed of sound in the target material)
> - significant ablation but no catastrophic disruption during
>   atmospheric passage
> - mass on impact 0.3-3 tons / diameter 0.6-1.1 m
>
> Best wishes,
>
> Bernd
>
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