At approximately 1,900 km (1,200 mi) in diameter,[1] it is the third-largest confirmed impact structure on the planet, after the Hellas and Utopia basins.

A study reported in Icarus described the complex geologic history of parts of Isidis, especially areas near the Deuteronilus contact.

[4] Just to the west of Isidis is Syrtis Major Planum, a low-relief shield volcano that is a prominent dark albedo feature of Mars, which formed after the basin.

The Beagle 2 lander was about to land in the eastern part of Isidis Planitia in December 2003, when contact with the craft was lost.

[9][10][11] (see discovery images here) In 2018 the Jezero (crater) in the north west rim of the Isidis basin was selected as a landing site for the Mars 2020 mission, including the Perseverance rover.