Dao Vallis (Mars)
Data as of 2026-10-23
What it is
- Type
- Vallis, valles
- IAU definition
Valley
- Diameter
- 794 km, 23 % of the radius of its body
- Centre
- 37.61° S, 88.89° east (planetocentric latitude, east longitude from 0 to 360°, the IAU convention)
- Name adopted
- 1979
- Origin of the name
Word for "star" in Thai.
Quoted in English, as the IAU publishes it.
In Galaxy
Opens its body in the application, the camera turned towards Dao Vallis.
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 | 547 | September 15, 1997 | June 30, 2001 |
| Mars Global Surveyor · Mars Orbiter Camera | 14,576 | October 11, 1997 | October 16, 2006 |
| 2001 Mars Odyssey Orbiter · Thermal Emission Imaging System | 14,463 | February 23, 2002 | November 14, 2025 |
| ESA's Mars Express · Observatoire Mineralogie, Eau, Glaces, Activite | 492 | January 8, 2004 | January 7, 2024 |
| ESA's Mars Express · High Resolution Stereo Camera | 672 | January 10, 2004 | February 14, 2026 |
| ESA's Mars Express · Planetary Fourier Spectrometer | 1,462 | January 21, 2004 | December 26, 2018 |
| ESA's Mars Express · Mars Advanced Radar for Subsurface and Ionsphere Sounding | 2,908 | August 7, 2005 | April 8, 2022 |
| Mars Reconnaissance Orbiter · Context Camera | 815 | September 29, 2006 | May 19, 2026 |
| Mars Reconnaissance Orbiter · Compact Reconnaissance Imaging Spectrometer for Mars | 14,548 | September 30, 2006 | April 30, 2022 |
| Mars Reconnaissance Orbiter · High-Resolution Imaging Science Experiment | 1,276 | September 30, 2006 | July 29, 2026 |
| Mars Reconnaissance Orbiter · Shallow Radar | 1,592 | December 18, 2006 | October 15, 2025 |
| ExoMars Trace Gas Orbiter · Colour and Stereo Surface Imaging System | 1,215 | April 4, 2018 | November 28, 2024 |
| Viking Orbiter 1 and 2 · Visual Imaging Subsystem Camera A/B | 755 | 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/1409
Type definitions: IAU Descriptor Terms, read on October 17, 2026. https://planetarynames.wr.usgs.gov/DescriptorTerms