PIA15332: Peak and a Half

Peak and a Half


This beautiful, unnamed crater is found within the Caloris impact basin, and formed partially atop another crater of similar size to its northwest. On the righthand side of the image you can see the crater's central peak; at the upper left, you can see where the crater wall intersects what is left of the older crater's central peak.

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.

Date acquired: December 24, 2011
Image Mission Elapsed Time (MET): 233221689
Image ID: 1177142
Instrument: Narrow Angle Camera (NAC) of the Mercury Dual Imaging System (MDIS)
Center Latitude: 36.6°
Center Longitude: 166.4° E
Resolution: 29 meters/pixel
Scale: Scene is approximately 30 km (19 miles) across
Incidence Angle: 36.6°
Emission Angle: 33.1°
Phase Angle: 69.7°

Background Info:

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.

These images are from MESSENGER, a NASA Discovery mission to conduct the first orbital study of the innermost planet, Mercury. For information regarding the use of images, see the MESSENGER image use policy .

Cataloging Keywords:

Name Value Additional Values
Target Mercury
Target Type Planet
Instrument Host MESSENGER
Host Type Orbiter
Instrument Mercury Dual Imaging System (MDIS)
Detector Narrow Angle Camera (NAC)
Extra Keywords Crater, Grayscale, Impact, Map, Radio
Acquisition Date
Release Date 2012-01-19
Date in Caption 2011-12-24
Image Credit NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington
Source photojournal.jpl.nasa.gov/catalog/PIA15332
Identifier PIA15332