Diogenite

Acondrita diogenita Johnstown. Image of NASA.

The diogenites are meteorites belonging to the achondrites, and which are composed of 95% orthopyroxenes and a small amount of olivine. Within the achondrites, they are included in the so-called HED group (Howardites, Eucrites, and Diogenites), which are meteorites believed to have come from the asteroid (4) Vesta. Their name comes from Diogenes of Apollonia, a 5th-century BC Greek philosopher who first suggested that meteorites came from space..