Image: Vesta spectral map HST1994

Description: Maps of 4 Vesta based on Hubble Space Telescope images obtained in November 1994 with a resolution of about 52 km per pixel. The top panel shows brightness differences through a 439 nm filter, with the dark feature "Olbers" centered around 0° longitude and 10° N latitude. The bottom panel is in false-color, correpsonding to spectral (and hence, presumably, composition) differences on the surface. Green colours are thought to represent basaltic lava flows, analogous to the Lunar maria.
Title: Vesta spectral map HST1994
Credit: http://hubblesite.org/newscenter/newsdesk/archive/releases/1995/40/image/a and manually reduced from maximum resolution version.
Author: NASA
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