Crater Ejecta in Northern Arabia Terra
HiRISE PICTURE OF THE DAY: 12 DECEMBER 2025

A Tale of Ejecta in Northern Arabia Terra

The objective of this observation is to examine ejecta from a well-preserved crater. This is a good place to image because there is little dust cover, so many details are visible. Context Camera image data hints at many small channels that are more easily seen with a HiRISE image. Also, just beyond the ejecta are many round mounds that may have something to do with the hot ejecta melting ground ice.



HiRISE Image of Exocomet 3I/ATLAS
On 2 October 2025, MRO turned away from Mars to image 3I/ATLAS, only the third interstellar object ever observed passing through our solar system!

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.

Ridges in Lycus Sulci
Much of the rocks in this area have been subjected to erosion by the wind, so the surface we see today was originally buried deep underground.