Mareotis Fossae (Mars)
Data as of 2026-10-23
What it is
- Type
- Fossa, fossae
- IAU definition
Long, narrow depression
- Diameter
- 1,907.9 km, 56 % of the radius of its body
- Centre
- 44.34° N, 283.88° east (planetocentric latitude, east longitude from 0 to 360°, the IAU convention)
- Name adopted
- 1973
- Origin of the name
From albedo feature at 32N, 96W.
Quoted in English, as the IAU publishes it.
In Galaxy
Opens its body in the application, the camera turned towards Mareotis Fossae.
Observed by
Instruments whose footprint touches this formation, counted by the PDS Orbital Data Explorer (data frozen on September 29, 2026). A footprint that touches it is not a study of it.
| Mission and instrument | Products | First | Last |
|---|---|---|---|
| Mars Global Surveyor · Mars Orbiter Laser Altimeter | 1,266 | September 15, 1997 | June 30, 2001 |
| Mars Global Surveyor · Mars Orbiter Camera | 26,778 | January 4, 1998 | October 17, 2006 |
| 2001 Mars Odyssey Orbiter · Thermal Emission Imaging System | 74,703 | February 20, 2002 | November 28, 2025 |
| ESA's Mars Express · Planetary Fourier Spectrometer | 4,186 | February 1, 2004 | December 25, 2018 |
| ESA's Mars Express · Observatoire Mineralogie, Eau, Glaces, Activite | 3,182 | February 1, 2004 | January 14, 2024 |
| ESA's Mars Express · High Resolution Stereo Camera | 2,230 | March 2, 2004 | September 9, 2025 |
| ESA's Mars Express · Mars Advanced Radar for Subsurface and Ionsphere Sounding | 6,959 | June 29, 2005 | March 19, 2022 |
| Mars Reconnaissance Orbiter · Compact Reconnaissance Imaging Spectrometer for Mars | 68,556 | October 4, 2006 | May 6, 2022 |
| Mars Reconnaissance Orbiter · High-Resolution Imaging Science Experiment | 3,463 | November 10, 2006 | July 28, 2026 |
| Mars Reconnaissance Orbiter · Context Camera | 2,854 | November 10, 2006 | May 25, 2026 |
| Mars Reconnaissance Orbiter · Shallow Radar | 5,384 | December 6, 2006 | February 8, 2026 |
| ExoMars Trace Gas Orbiter · Colour and Stereo Surface Imaging System | 4,960 | April 29, 2018 | December 20, 2024 |
| Viking Orbiter 1 and 2 · Visual Imaging Subsystem Camera A/B | 1,367 | no date published | no date published |
Sources
International Astronomical Union Working Group for Planetary System Nomenclature, Gazetteer of Planetary Nomenclature, read on October 23, 2026. Feature page: https://planetarynames.wr.usgs.gov/Feature/3695
Type definitions: IAU Descriptor Terms, read on October 17, 2026. https://planetarynames.wr.usgs.gov/DescriptorTerms