Buzzard Coulee meteorite

Buzzard Coulee[1] is the collective name of the meteorites fallen on November 20, 2008 over Saskatchewan, Canada.

Buzzard Coulee
64.5 gram Buzzard Coulee sample
TypeChondrite
ClassOrdinary chondrite
GroupH4
Shock stageS2
Weathering gradeW0
CountryCanada
RegionSaskatchewan, Canada
Coordinates52°59′46″N 109°50′53″W
Observed fallYes
Fall dateNovember 20, 2008
Found dateNovember 27, 2008
TKW41 kilograms (90 lb)[1]
Strewn fieldYes
Buzzard Coulee, 12.3g sample.
Related media on Wikimedia Commons

History

The fireball was first spotted at around 17:30 MST (00:30 UTC) (ISO 8601 format: 2008-11-21T00:30Z) and was reported by people living in Alberta, Saskatchewan, Manitoba, and even North Dakota.[2] It was five times as bright as a full moon.[3] Over 400 people reported seeing it.[4] There are several videos of the meteoroid on YouTube.[5] The object split into multiple pieces before widespread impact.[6] The meteoroid entered the atmosphere at approximately 14 kilometres per second and is estimated to have been about the size of a desk and have had a mass of approximately 10 tonnes.[7]

The village of Marsden, Saskatchewan became a hub of activity for meteorite hunters, being just south of the estimated 20 square kilometre debris field. Locals dubbed the object the "Marsden Meteor"; many of the residents reported seeing, hearing and even smelling the burning fragments as they fell.[8] The meteor was also referred to as the "Buzzard Coulee fireball", named after the area where searchers found the first fragments.[9] Buzzard Coulee is located approximately 2 kilometres (1.2 mi) from the Battle River valley.

The first pieces of the rock were found by Ellen Milley, a University of Calgary Master's student on November 27, 2008. Milley was a part of a team working with Dr. Alan Hildebrand, University of Calgary professor and Canadian Research Chair in Planetary Science in the ice of a fish pond about 40 kilometres (25 mi) south east of Lloydminster, Saskatchewan, near the hamlet of Lone Rock. Lone Rock, Battle River, Marsden and other names were possible candidates for the meteorite name, but the University of Calgary researchers followed the local residents' lead in officially calling the fall Buzzard Coulee, after the oldest-named geographic feature in the fall area. Ten pieces were initially found; the largest fragment weighed 380 grams (13 oz) and smallest was 10 grams (0.35 oz).[10][11][12]

In total, more than one thousand meteorite fragments have been collected from the 10-tonne fireball, among them are two 13 kilograms (29 lb) fragments.[13] This event has set a new Canadian record for the most number of pieces recovered from a single meteorite fall.[14]

Robert A. Haag, a famous American meteorite hunter, offered $10,000 to anyone who gave him the first one-kilogram chunk of the meteorite.[3]

"We can see on the videos that there were three big pieces that continue here. And those aren't found yet," said Alan Hildebrand on May 4, 2009. The meteorite hunters have, however, broken a world's record for collecting over 1,000 fragments, the most ever collected from a single meteor fall. The largest found to date was 13 kilograms (29 lb).[15]

Classification

Buzzard Coulee was classified as ordinary chondrite H4 with a shock stage S2 and a weathering grade W0.[1]

See also

References
  1. Meteoritical Bulletin Database: Buzzard Coulee
  2. "Massive fireball lights up the night sky". ctvcalgary.ca. Nov 21, 2008. Retrieved 2008-11-22.
  3. Brooymans, Hanneke (November 22, 2008). "Hunt on for space rock". The Vancouver Sun. The Edmonton Journal. Archived from the original on 2008-12-10. Retrieved 2008-11-24.
  4. Brooymans, Hanneke; Richard Cuthbertson (November 22, 2008). "Meteor likely broke on entry". Calgary Herald. Archived from the original on 2012-11-05. Retrieved 2008-11-22.
  5. Police dash cam of Meteor over Edmonton, Canada on YouTube
  6. Driedger, Brenton (2008-11-21). "Relic hunters hot on meteorite trail". iNews880.com. Retrieved 2008-11-22.
  7. "10-tonne asteroid lit up Prairie skies: Univ. of Calgary". CTV.ca. Archived from the original on 2008-12-03. Retrieved 2008-11-25.
  8. O'Neill, Katherine (November 29, 2008). "Girding for a meteoric rise in popularity". The Globe and Mail. Retrieved 2008-12-04.
  9. "10,000 meteorites touched down in Sask.: scientist". CTV News. Archived from the original on 2008-12-23. Retrieved 2008-12-22.
  10. Weber, Bob (November 28, 2008). "Scientists find space rock that streaked through skies of Western Canada". Macleans.ca. Archived from the original on February 22, 2012. Retrieved November 29, 2008.
  11. Cormier, Ryan (2008-12-23). "Pieces of meteorite 'a gift from God' :About 130 chunks have been recovered so far". The Edmonton Journal. Retrieved 2009-03-31.
  12. Gerein, Keith (November 28, 2008). "Calgary researchers find meteorite bits near Lloydminster". Edmonton Journal. Archived from the original on April 3, 2009. Retrieved 2009-03-31.
  13. Van Rassel, Jason (May 4, 2009). "Valuable fragments collected from Prairie meteorite". The StarPhoenix. Canwest. Archived from the original on January 18, 2013. Retrieved 2011-11-10.
  14. "Meteorite hunters break Canadian record". University of Calgary. May 5, 2009. Archived from the original on June 20, 2012. Retrieved 2011-11-10.
  15. "Despite record-setting meteorite hunt, big chunks still missing". CBC News. May 4, 2009. Retrieved 2009-05-04.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.