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Northwest Africa 257
Basic information Name: Northwest Africa 257
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 257
Observed fall: No
Year found: 1999
Country: Morocco
Mass:help 360 g
Classification
  history:
NHM Catalogue:  5th Edition  (2000)  H6
Meteoritical Bulletin:  MB 85  (2001)  H6
MetBase:  v. 7.1  (2006)  H6
Recommended:  H6    [explanation]

This is 1 of 5851 approved meteorites (plus 5 unapproved names) classified as H6.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Data from:
  MB85
  Table 4
  Line 117:
Origin or pseudonym:Tagmart
Place of purchase:Tagounite
Date:1999
Latitude:29°55'N
Longitude:5°35'W
Mass (g):360
Pieces:1
Class:H6
Weathering grade:W3/4
Fayalite (mol%):18.4
Ferrosilite (mol%):16.3
Classifier:P. Sipiera (Harper)
Type spec mass (g):9.7
Main mass:Fectay
Institutions
   and collections
Fectay: Bruno Fectay and Carine Bidaut, La Memoire de la Terre SARL, 39800 Aumont, France; Website (private address)
Harper: Planetary Studies Foundation,10 Winterwood Lane, Unit B, Galena, Illinois 61036-9283, United States; Website (institutional address; updated 1 Dec 2011)
Catalogs:
References: Published in Meteoritical Bulletin, no. 85, MAPS 36, A293-A322 (2001)
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Geography:

Morocco
Coordinates:
     Catalogue of Meteorites:   (29° 55'N, 5° 35'W)
     Recommended::   (29° 55'N, 5° 35'W)

Statistics:
     This is 1 of 73 approved meteorites from Souss-Massa-Draâ, Morocco (plus 4 unapproved names)
     This is 1 of 1386 approved meteorites from Morocco (plus 16 unapproved names) (plus 1 impact crater)
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