| 词条 | Homestead (meteorite) | |||
| 释义 |
|Name= Homestead |Image= Homestead meteorite.jpg |Image_caption= 20.4 g partial slice taken from the 450 g fragment that resided in the AMNH for over a century |Type= Chondrite |Class= Ordinary chondrite |Group= L5 |Structural_classification= |Composition= |Shock= |Weathering= |Country= United States |Region= Iowa |Lat_Long= {{coord|41|48|N|91|52|W|display=inline,title}}[1] |Observed_fall= Yes |Fall_date= 1875-02-12 |Found_date= |TKW= 230 kg |Strewn_field = Yes |Alternative names=Amana, Iowa County }} Homestead is a L5 meteorite fallen in 1875 in Iowa, United States. HistoryOn the evening of 12 February 1875 above Iowa a brilliant fireball was observed. About 100 meteorite fragments fell over a {{convert|18|sqmi|km2|adj=on}} snowy countryside area from Amana to Boltonville in Iowa County. The first found fragment, a stone weighing about {{convert|3.5|kg|lb}}, was discovered by Sarah Sherlock {{convert|3|km|mi}} south of Homestead.[2] The area was wooded and covered by snow, impeding recovery efforts. On 10 February a {{convert|40|cm|in}} snowfall blanketed the ground, preventing the great majority of the fragments from being discovered until Spring. The {{convert|74|lb|kg}} main mass was found along with a {{convert|48|lb|kg}} fragment buried {{convert|2|ft|m}} in the soil.[2] As of December 2011, approximately {{convert|230|kg|lb}} has been found. Composition and classificationIt is a L5 type ordinary chondrite. It is also brecciated and veined. Notes1. ^{{metbull|11901|Homestead}} 2. ^1 Paul Garvin, Iowa's minerals: their occurrence, origins, industries, and lore. University of Iowa Press, 1998. [https://books.google.com/books?id=3a1XkpBGdAcC&pg=PA187&lpg=PA187&dq=SherlockPage 187] Bibliography
See also
External links{{wikisource|Popular Science Monthly/Volume 7/September 1875/The Great Iowa Meteor|The Great Iowa Meteor}}{{commons category|Homestead meteorite}}
5 : Meteorites found in the United States|Geology of Iowa|1875 in Iowa|1875 in science|Iowa County, Iowa |
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