Hematite in Capri Chasma
Hematite in Capri Chasma
ESP_022276_1670  Science Theme: Composition and Photometry
Crystalline gray hematite (Fe2O3) was first detected on Mars using the Thermal Emission Spectrometer (TES). The landing site for the Mars Exploration Rover (MER) Opportunity was chosen at one of these hematite sites in Meridiani Planum.

After landing and driving around on the surface, scientists discovered that the hematite occurred in millimeter-size rounded particles that were concentrated along the upper surfaces of the soils.

In this HiRISE image taken within Capri Chasma, TES also detected the same crystalline gray hematite like that found at Meridiani Planum. The enhanced-color image shows a red surface, consistent with a material that contains the element iron. The plains here are similar to those seen at Meridiani Planum and suggest that hematite-rich particles are concentrating on the upper soils where they can be detected from orbit by TES.

Written by: Cathy Weitz  (1 June 2011)
Acquisition date
28 April 2011

Local Mars time

Latitude (centered)

Longitude (East)

Spacecraft altitude
264.4 km (164.3 miles)

Original image scale range
53.1 cm/pixel (with 2 x 2 binning) so objects ~159 cm across are resolved

Map projected scale
50 cm/pixel and North is up

Map projection

Emission angle

Phase angle

Solar incidence angle
39°, with the Sun about 51° above the horizon

Solar longitude
282.4°, Northern Winter

For non-map projected images
North azimuth:  97°
Sub-solar azimuth:  342.5°
Black and white
map projected  non-map

IRB color
map projected  non-map

Merged IRB
map projected

Merged RGB
map projected

RGB color
non-map projected

Black and white
map-projected   (261MB)

IRB color
map-projected   (160MB)

Black and white
map-projected  (123MB)
non-map           (119MB)

IRB color
map projected  (71MB)
non-map           (171MB)

Merged IRB
map projected  (274MB)

Merged RGB
map-projected  (249MB)

RGB color
non map           (156MB)
B&W label
Color label
Merged IRB label
Merged RGB label
EDR products

IRB: infrared-red-blue
RGB: red-green-blue
About color products (PDF)

Black & white is 5 km across; enhanced color about 1 km
For scale, use JPEG/JP2 black & white map-projected images

All of the images produced by HiRISE and accessible on this site are within the public domain: there are no restrictions on their usage by anyone in the public, including news or science organizations. We do ask for a credit line where possible:

NASA’s Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, Calif., manages the Mars Reconnaissance Orbiter for NASA’s Science Mission Directorate, Washington. The HiRISE camera was built by Ball Aerospace and Technology Corporation and is operated by the University of Arizona.