Fragmentation model analysis of the observed atmospheric trajectory of the Tagish Lake fireball
A recently published meteoroid fragmentation model (FM) was applied to observational data on the Tagish Lake meteoric fireball. An initial mass of 56,000 kg, derived from seismic and infrasound data by Brown et al.(2002), proved to be consistent with a very low value of intrinsic ablation coefficien...
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ftunivarizonaojs:oai:journals.uair.arizona.edu:article/15387 2023-05-15T18:30:02+02:00 Fragmentation model analysis of the observed atmospheric trajectory of the Tagish Lake fireball Ceplecha, Zdeněk 2007-01-01 application/pdf https://journals.uair.arizona.edu/index.php/maps/article/view/15387 eng eng Meteoritics & Planetary Science Archives https://journals.uair.arizona.edu/index.php/maps/article/view/15387/15375 https://journals.uair.arizona.edu/index.php/maps/article/view/15387 Meteoritics & Planetary Science Archives; Vol 42, No 2 (2007); 185-189 1945-5100 1086-9379 Light curve;Meteoroids;Ablation;Mathematic model info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article 2007 ftunivarizonaojs 2020-11-14T17:53:01Z A recently published meteoroid fragmentation model (FM) was applied to observational data on the Tagish Lake meteoric fireball. An initial mass of 56,000 kg, derived from seismic and infrasound data by Brown et al.(2002), proved to be consistent with a very low value of intrinsic ablation coefficient of 0.0009 s^2km^(-2). The average residual of the best fit to the observed light curve was 0.10 stellar magnitude. The apparent ablation coefficient varied from 0.0009 to 1.52 s^2 km^(-2), with an average value of 0.054 s^2 km^(-2) (determined by the gross fragmentation [GF] model). The FM found 33 individual fragmentation events during the penetration of the 56,000 kg initial mass of the Tagish Lake meteoroid through the atmosphere, with five of the events fragmenting more than 10% of the instantaneous mass of the main body. The largest event fragmented 88% of the mass of the main body at a height of 34.4 km. The velocity of the main body mass of 2660 kg at a height of 29.2 km (the last observed light) was 13.1 km/s. Strong fragmentation at heights lower than 29.2 km is very probable. The extreme fragmentation process of the Tagish Lake meteoroid puts its classification well outside the IIIB type in the direction of less cohesive bodies. The light curve could not be explained at all by making use of only the apparent ablation coefficient and apparent luminous efficiency. Article in Journal/Newspaper Tagish Journals at the University of Arizona Tagish ENVELOPE(-134.272,-134.272,60.313,60.313) Tagish Lake ENVELOPE(-134.233,-134.233,59.717,59.717) |
institution |
Open Polar |
collection |
Journals at the University of Arizona |
op_collection_id |
ftunivarizonaojs |
language |
English |
topic |
Light curve;Meteoroids;Ablation;Mathematic model |
spellingShingle |
Light curve;Meteoroids;Ablation;Mathematic model Ceplecha, Zdeněk Fragmentation model analysis of the observed atmospheric trajectory of the Tagish Lake fireball |
topic_facet |
Light curve;Meteoroids;Ablation;Mathematic model |
description |
A recently published meteoroid fragmentation model (FM) was applied to observational data on the Tagish Lake meteoric fireball. An initial mass of 56,000 kg, derived from seismic and infrasound data by Brown et al.(2002), proved to be consistent with a very low value of intrinsic ablation coefficient of 0.0009 s^2km^(-2). The average residual of the best fit to the observed light curve was 0.10 stellar magnitude. The apparent ablation coefficient varied from 0.0009 to 1.52 s^2 km^(-2), with an average value of 0.054 s^2 km^(-2) (determined by the gross fragmentation [GF] model). The FM found 33 individual fragmentation events during the penetration of the 56,000 kg initial mass of the Tagish Lake meteoroid through the atmosphere, with five of the events fragmenting more than 10% of the instantaneous mass of the main body. The largest event fragmented 88% of the mass of the main body at a height of 34.4 km. The velocity of the main body mass of 2660 kg at a height of 29.2 km (the last observed light) was 13.1 km/s. Strong fragmentation at heights lower than 29.2 km is very probable. The extreme fragmentation process of the Tagish Lake meteoroid puts its classification well outside the IIIB type in the direction of less cohesive bodies. The light curve could not be explained at all by making use of only the apparent ablation coefficient and apparent luminous efficiency. |
format |
Article in Journal/Newspaper |
author |
Ceplecha, Zdeněk |
author_facet |
Ceplecha, Zdeněk |
author_sort |
Ceplecha, Zdeněk |
title |
Fragmentation model analysis of the observed atmospheric trajectory of the Tagish Lake fireball |
title_short |
Fragmentation model analysis of the observed atmospheric trajectory of the Tagish Lake fireball |
title_full |
Fragmentation model analysis of the observed atmospheric trajectory of the Tagish Lake fireball |
title_fullStr |
Fragmentation model analysis of the observed atmospheric trajectory of the Tagish Lake fireball |
title_full_unstemmed |
Fragmentation model analysis of the observed atmospheric trajectory of the Tagish Lake fireball |
title_sort |
fragmentation model analysis of the observed atmospheric trajectory of the tagish lake fireball |
publisher |
Meteoritics & Planetary Science Archives |
publishDate |
2007 |
url |
https://journals.uair.arizona.edu/index.php/maps/article/view/15387 |
long_lat |
ENVELOPE(-134.272,-134.272,60.313,60.313) ENVELOPE(-134.233,-134.233,59.717,59.717) |
geographic |
Tagish Tagish Lake |
geographic_facet |
Tagish Tagish Lake |
genre |
Tagish |
genre_facet |
Tagish |
op_source |
Meteoritics & Planetary Science Archives; Vol 42, No 2 (2007); 185-189 1945-5100 1086-9379 |
op_relation |
https://journals.uair.arizona.edu/index.php/maps/article/view/15387/15375 https://journals.uair.arizona.edu/index.php/maps/article/view/15387 |
_version_ |
1766213523735576576 |