Radial Ridges on Crater Floor
HiRISE PICTURE OF THE DAY: 26 SEPTEMBER 2023

Radial Ridges on a Crater Floor

The objective of this observation is to determine the nature of a group of short radial ridges on an old crater floor. These may be inverted channels from previous glaciers in the crater. The scene can be found in Context Camera data.



HiRISE Instrument News
Since July 23, 2023, HiRISE observations have lacked data from the RED4 CCD due to a hardware issue, creating a gap in the middle of image products and reducing the color swath to 1 CCD width. We are investigating the hardware issue and may be able to acquire some RED4 data in the future.

Circular Sand Dunes
Sand dunes of many shapes and sizes are common on Mars. In this example the dunes are almost perfectly circular, which is unusual.