New paper accepted: Flensburg (C1-ungr.) in MAPS

A paper describing the trajectory and orbit of the Flensburg (carbonaceous, C1 ungrouped) meteorite, which fell on September 12th, 2019 in northernmost Germany, has been accepted for publication into MAPS, and the corresponding preprint uploaded on The meteoroid delivering the single known piece of the Flensburg meteorite (of only 24.5 g) originates from a quite elongated orbit with a large semi-major axis (ca. 2.8 AU), which puts it right on the 5:2 orbital resonance with Jupiter, as well as in the Jupiter Family Comets field (2 < Tisserand parameter <3). It had a mass in the range of 10-20 metric tons and correspondingly, a radius of 2-3 meters. The authors suggest that based on the orbit and the very short cosmic-ray exposure age of only 7 ka (Bischoff et al., 2021), the meteoroid probably originated on a carbonaceous asteroid close to the edge of the 5:2 resonance.

Flensburg is only the fourth carbonaceous meteorite with an orbit (the others being Tagish Lake, Maribo, and Sutter’s Mill). Its interesting to note that carbonaceous meteorites are now slightly over-represented (ca. 11%) among meteorites with orbits compared to their abundance among “normal” finds (ca. 4%), perhaps because, once landed on the surface, they decay quickly and are thus less likely to be found without the “prompt” provided by the fireball observation. /m4

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