Western Rim Region of Korolev Crater
Western Rim Region of Korolev Crater
PSP_007961_2530  Science Theme: Fluvial Processes
This image was originally suggested by Ehsan Sanaei's high school astronomy club in Yazd, Iran. They write, "(We are interested in) exploring the impact region near the Northern Martian pole and observing the contrast between ice-covered and [non-ice covered] regions."

Mrs. Stoica's 9th grade class, at Tudor Vianu High-School of Computer Science, in Bucharest, Romania, helped to analyze the image by writing that "we observe a major crater, a small mountain chain, dunes and a series of small valleys and crevasses which (contain) ice."

Indeed, this image shows part of the western rim of Korolev Crater, a prominent 80 kilometer diameter crater located in the Northern polar region. It was taken in northern spring and shows dark regions of dust and sediment and bright regions of ice and frost. At highest resolution both bright and dark areas of the surface are covered by polygonal fracture patterns. Although much of the ice has likely started to sublimate (change from a solid to a gas) in the darker regions, ice fills the fractures.

Written by: Ginny Gulick  (19 November 2008)
Acquisition date
07 April 2008

Local Mars time

Latitude (centered)

Longitude (East)

Spacecraft altitude
317.8 km (197.5 miles)

Original image scale range
63.6 cm/pixel (with 2 x 2 binning) so objects ~191 cm across are resolved

Map projected scale
50 cm/pixel

Map projection

Emission angle

Phase angle

Solar incidence angle
56°, with the Sun about 34° above the horizon

Solar longitude
55.7°, Northern Spring

For non-map projected images
North azimuth:  100°
Sub-solar azimuth:  322.7°
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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.