HiRISE | Slope Streaks in Acheron Fossae (ESP_078535

NASA/JPL-Caltech/UArizona

Slope Streaks in Acheron Fossae
ESP_078535_2175 Science Theme:

This image shows numerous dark streaks along a steep slope in the Acheron Fossae region of Mars.

This region is covered in thick layers of dust. On steep slopes, this dust occasionally becomes unstable and flows downhill, like small avalanches. The dark streaks are the scars left behind from these dust avalanches. The brighter dust is removed, revealing the darker rocks underneath.

The dust avalanches in this image are generally moving from the higher ground on the right side of the image toward the lower ground to the left.

Written by: Chris Okubo (2 May 2023)

Acquisition date
28 April 2023

Local Mars time
15:02

Latitude (centered)
37.320°

Longitude (East)
229.125°

Spacecraft altitude
291.2 km (181.0 miles)

Original image scale range
from 29.2 cm/pixel (with 1 x 1 binning) to 58.4 cm/pixel (with 2 x 2 binning)

Map projected scale
25 cm/pixel and North is up

Map projection
Equirectangular

Emission angle
4.1°

Phase angle
46.8°

Solar incidence angle
43°, with the Sun about 47° above the horizon

Solar longitude
57.1°, Northern Spring

For non-map projected images
North azimuth: 97°
Sub-solar azimuth: 357.1°

JPEG
Black and white
map projected  non-map

IRB color
map projected  non-map

Merged IRB
map projected

Merged RGB
map projected

RGB color
non-map projected

JP2
Black and white
map-projected   (533MB)

IRB color
map-projected   (398MB)

JP2 EXTRAS
Black and white
map-projected (213MB)
non-map           (326MB)

IRB color
map projected (108MB)
non-map           (271MB)

Merged IRB
map projected (157MB)

Merged RGB
map-projected (150MB)

RGB color
non map           (267MB)

ADDITIONAL INFORMATION
B&W label
Color label
Merged IRB label
Merged RGB label
EDR products
HiView

NB
IRB: infrared-red-blue
RGB: red-green-blue
About color products (PDF)

Black & white is 5 km across; enhanced color about 1 km
For scale, use JPEG/JP2 black & white map-projected images

USAGE POLICY
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/JPL-Caltech/UArizona

POSTSCRIPT
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.