HiRISE: Seasonal flows in Asimov Crater

Seasonal flows called recurring slope lineae (RSL) grow down warm slopes in the summer, fade when they become inactive, then re-form the following year when the slopes warm up again from the Sun. We see many of these RSL over the steep equator-facing slopes of the troughs within Asimov Crater, as illustrated in this cutout. However, just a few days later HiRISE imaged another steep equator-facing slope in Asimov crater, and no RSL are visible at all (ESP_040551_1330). These two slopes are very similar in slope angle, rockiness, and other properties seen by… [More at link]