Young Impact Crater in Isidis
Young Impact Crater in Isidis
PSP_008017_2020  Science Theme: Impact Processes
This image shows a young impact crater in the northern part of Isidis Planitia. The crater is fresh enough to preserve some fine textures that are eroded around other craters.

The ejecta blanket of material thrown out of the crater is distinctly dark and rough, with many small boulders and rugged texture. To the south of the crater there is a wedge-shaped area with little ejected material. This may indicate that the impactor which formed this crater came from the south, since at moderate impact angles ejecta is preferentially thrown in the direction of motion of the impactor.

Eventually, a combination of erosion and mantling by dust will smooth and obscure the ejecta and cover over the crater, turning it into a shallow depression like the others in this image. Reworking of the crater is already beginning, as shown by the network of fine ridges (wind-blown ripples) on the crater floor.

Written by: Colin Dundas  (21 May 2008)
Acquisition date
12 April 2008

Local Mars time

Latitude (centered)

Longitude (East)

Spacecraft altitude
282.7 km (175.7 miles)

Original image scale range
28.3 cm/pixel (with 1 x 1 binning) so objects ~85 cm across are resolved

Map projected scale
25 cm/pixel and North is up

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Phase angle

Solar incidence angle
42°, with the Sun about 48° above the horizon

Solar longitude
57.6°, Northern Spring

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North azimuth:  97°
Sub-solar azimuth:  12.9°
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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.