Satellite observation of the dust trail of a major bolide event over the Bering Sea on December 18, 2018

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F20%3A00537300" target="_blank" >RIV/67985815:_____/20:00537300 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1051/0004-6361/202039393" target="_blank" >https://doi.org/10.1051/0004-6361/202039393</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1051/0004-6361/202039393" target="_blank" >10.1051/0004-6361/202039393</a>

Result language
angličtina
Original language name
Satellite observation of the dust trail of a major bolide event over the Bering Sea on December 18, 2018
Original language description
Using the satellite imagery of the dust trail left behind by the bolide, we tried to reconstruct the bolide trajectory. In combination with the bolide speed reported by the USGS, we computed the pre-atmospheric orbit. Observations in various spectral bands from 0.4 to 13.3 mu m enabled us to study the dust properties. The bolide radiant was found to be 13 degrees +/- 9 degrees from that reported by the USGS, at azimuth 130 degrees (from south to west) and zenith distance 14 degrees. The bolide position was confirmed, including the height of maximum dust deposition around 25 km. The incoming asteroid had to be quite strong to maintain a high speed down to this height. The speed of 32 km s(-1), reported by the USGS, was found to be plausible. The orbit had a high inclination of about 50 degrees and a perihelion distance between 0.95-1 AU. The semimajor axis could not be restricted well but was most probably between 1-3 AU. The dust reflectance was much lower in the blue than in the red, consistent with the material of A- or L-type asteroid. The absorption at 11 mu m confirms the presence of crystalline silicates in the dust.
Czech name
—
Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10308 - Astronomy (including astrophysics,space science)

Project
<a href="/en/project/GX19-26232X" target="_blank" >GX19-26232X: Compositional and orbital mapping of meteoroid sources in the Solar System</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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