|Basic information||Name: Stubenberg|
This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: Yes, confirmed fall
Year fell: 2016
Mass: 1473 g
This is 1 of 2616 approved meteorites classified as LL6. [show all]
Search for other: LL chondrites, LL chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
|Comments:||Approved 12 May 2016|
Writeup from MB 105:
Stubenberg 48°17.7’N, 13°7.0’E
Confirmed fall: 2016 Mar 6
Classification: Ordinary chondrite (LL6)
History: (Pavel Spurný, CzAS). A very bright bolide was observed by thousands of eyewitnesses over Austria, Germany and the Czech Republic on March 6, 2016, at 21:36:51-56 UT. It was recorded photographically and photoelectrically by digital all-sky fireball observatories at six Czech stations of the European Fireball Network. A digital photographic spectrum of the bolide was also obtained. Based on these instrumental data, precise results on atmospheric trajectory, heliocentric orbit, and fragmentation history were quickly determined. From this analysis it was evident that this event likely resulted in multiple stones falling: the impact site was modeled and sent to German colleagues four days after the fall. All of the meteorites were found in the predicted location for a given mass.
Physical characteristics: (D. Heinlein). A total mass of 1.473 kg was recovered within the predicted fall site. The largest fragment has a mass of 1.320 kg and was found in a 14-cm-deep impact pit. The remaining 153 g of material consists of several pieces resulting from five different fragments. The first meteorite, 48 g, was found six days after the fall: it was broken into many pieces after hitting a hard surface. The other recovered fragments have masses of 42, 36, 19, and 8 g.
Petrography: (S. Ebert and A. Bischoff, IfP). Based on the study of the thin sections, Stubenberg is brecciated. Only highly recrystallized fragments (type 6) were observed, having only very rare, indistinct chondrules. Plagioclase (some >100 μm) and olivine show undulatory extinction, and the olivines show distinct sets of planar fractures indicating that the rock is weakly shocked (S3). Opaque phases include metals (kamacite, taenite), troilite, and chromite. Other accessory phases include Cl-apatite and merrillite. Several shock veins cross the meteorite.
Geochemistry: (S. Ebert and A. Bischoff, IfP). The mean composition of olivine is Fa31.4±0.3 (Fa30.5-32.2, n=54). The low-Ca pyroxenes and Ca-pyroxenes have mean compositions of Fs25.4±0.3 (Fs24.8-26.1, n= 43) and Fs11.2Wo41.4 (n=7), respectively. Mean plagioclase composition is An11.1±0.4Or5.5±1.2 (An10.3-12.1, n= 42). Kamacite has mean Ni and Co concentrations of 3.9 and 6.1 wt%, respectively (n=8). The taenite composition is variable, with Ni content varying from 41.9 to 48.2 wt% (mean: 44.3 wt% Ni, ~1.8 wt% Co, n=38).
Classification: LL chondrite breccia (LL6, S3, W0)
Specimens: Type Specimens: 20.1 g, IfP; the main masses are with the finders.
IfP: Institut für Planetologie, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany (institutional address; updated 23 Jan 2012)
CzAS: Astronomical Institute CAS, Fricova 298, 251 65 Ondrejov, Czech Republic, Czech Republic (institutional address; updated 1 Apr 2015)
Heinlein: Dieter Heinlein, Lilienstrasse 3, 86156 Augsburg, Germany; Website (private address)
|References:||Published in Meteoritical Bulletin, no. 105, in preparation (2016)|
This is 1 of 8 approved meteorites from Bayern, Germany (plus 4 unapproved names) (plus 1 impact crater)
This is 1 of 51 approved meteorites from Germany (plus 22 unapproved names) (plus 2 impact craters)
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