The Hills of Caloris: Nasa Messenger Image Relase Date: 2 Sept 2011

Date acquired: July 29, 2011 Image Mission Elapsed Time (MET): 220461805 Image ID: 566929 Instrument: Narrow Angle Camera (NAC) of the Mercury Dual Imaging System (MDIS) Center Latitude: 13.50° Center Longitude: 158.7° E Resolution: 24 meters/pixel Scale: This scene is approximately 28 km (17 miles) across Incidence Angle: 80.9° Emission Angle: 30.7° Phase Angle: 111.7° Of Interest: These hills make up a small portion of the southwestern rim of the 1550-km Caloris basin. This region was seen only with the sun high in the sky during MESSENGER's flybys of Mercury (and not at all by Mariner 10), so with the sun near the horizon in images like this one we are getting a great look at the surface's texture and topography. This image was acquired as a high-resolution targeted observation. Targeted observations are images of a small area on Mercury's surface at resolutions much higher than the 250-meter/pixel (820 feet/pixel) morphology base map or the 1-kilometer/pixel (0.6 miles/pixel) color base map. It is not possible to cover all of Mercury's surface at this high resolution during MESSENGER's one-year mission, but several areas of high scientific interest are generally imaged in this mode each week. The MESSENGER spacecraft is the first ever to orbit the planet Mercury, and the spacecraft's seven scientific instruments and radio science investigation are unraveling the history and evolution of the Solar System's innermost planet. Visit the Why Mercury? section of this website to learn more about the key science questions that the MESSENGER mission is addressing. During the one-year primary mission, MDIS is scheduled to acquire more than 75,000 images in support of MESSENGER's science goals.

Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington