Craters near Nilokeras Scopulus
Craters near Nilokeras Scopulus
ESP_039432_2115  Science Theme: Sedimentary/Layering Processes
This image shows two pits partially filled with lumpy material, probably trapped dust that blew in from the atmosphere.

The pits themselves resemble impact craters, but they are part of a chain of similar features aligned with nearby faults, so they could be collapse features instead. Note also the tracks left by rolling boulders at the bottom of the craters.

Nilokeras Scopulus is the name for the cliff, about 756 kilometers long, in the northern hemisphere of Mars where these craters are located. It was named based on an albedo (brightness) feature mapped by astronomer E. M. Antoniadi in 1930.

This caption is based on a science rationale from HiWish.

Written by: HiRISE Science Team (narration: Tre Gibbs)  (4 March 2015)
Acquisition date
25 December 2014

Local Mars time

Latitude (centered)

Longitude (East)

Spacecraft altitude
289.5 km (179.9 miles)

Original image scale range
29.0 cm/pixel (with 1 x 1 binning) so objects ~87 cm across are resolved

Map projected scale
25 cm/pixel and North is up

Map projection

Emission angle

Phase angle

Solar incidence angle
71°, with the Sun about 19° above the horizon

Solar longitude
259.1°, Northern Autumn

For non-map projected images
North azimuth:  96°
Sub-solar azimuth:  319.1°
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Black & white is 5 km across; enhanced color about 1 km
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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.