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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

<a href="/cs/project/GX19-26232X" target="_blank" >GX19-26232X: Mapování zdrojů meteoroidů z hlediska jejich složení a výskytu ve sluneční soustavě</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2020

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Astronomy & Astrophysics

ISSN

1432-0746

e-ISSN

—

Svazek periodika

644

Číslo periodika v rámci svazku

December

Stát vydavatele periodika

FR - Francouzská republika

Počet stran výsledku

15

Strana od-do

A58

Kód UT WoS článku

000596876300001

EID výsledku v databázi Scopus

2-s2.0-85097346142