Meteorite and Asteroid Classification

Carbonaceous Chondrite

Iron Meteorite


Ordinary Chondrite

Iron Meteorite (Sikhote 3)

Stony-iron Meteorite

Widmanstatten Patterns

Widmanstatten Patterns

Shatter Cone (Carswell)

Willamette Meteorite

Asteroid Classification

S-typeSurfaces are iron or magnesium-rich silicates plus perhaps metallic iron-nickel. Moderate albedos (0.1-0.2), reddish, low abundance of volatiles. Reside in the inner part of the asteroid belt.
E-typeSimilar to S-type, but higher albedos (0.25-0.6) and a tendency to be closer to the sun.
M-typeMetallic iron-nickel surfaces. Albedos 0.10-0.18, reddish, inner belt comixed with S-types.
C-typeMost common. Dark albedos (0.03-0.07), carbonaceous material, many have volatiles such as water.
B-, F-, G-typeSimilar to C-type in composition and location. They have small but detectable spectral differences.
P-typeOuter-edge and beyond-belt. Reddish, albedos 0.02-0.06, probable organic compounds present.
D-typeEven redder than P-types, and farther from the sun. Jupiter's Trojans are dominated by D-types, and some of Jupiter's smaller moons also exhibit similar spectra.