Fluvial Erosion in Phlegra Montes
HiRISE PICTURE OF THE DAY: 4 JUNE 2026
Fluvial Erosion in Phlegra Montes

This public target via HiWish suggests to observe possible fluvial erosion that could help understand the climate history of Mars. Context Camera data and previous HiRISE images show faint, but possible channels. Phlegra Montes is a range of gently curving mountains and ridges on Mars, extending from the northeastern portion of the Elysium volcanic province to the northern lowlands.



100,000 Image of Mars!
On 7 October 2025, the HiRISE camera aboard MRO acquired an image of the Syrtis Major plains that marks over 100,000 images of Mars, which is a fabulous milestone!
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
HiRISE Instrument News
Since mid-2023, our RED4 CCD has operated only intermittently due to a hardware issue, creating gaps in the middle of some image products and reducing the color swath to 1 CCD width. We continue to command RED4 in all observations and it returns data approximately 50% of the time

Layers in Claritas Fossae
The objective of this observation is to determine the nature of a group of exposed layers. They seem to be from material sitting at the bottom of a trough instead of in the trough walls. Located between the lava plains of Daedalia Planum and Solis Planum, Claritas Fossae is a graben-filled highland and was formed prior to the large lava flows of the Tharsis region.