Landing Site Summary
NASA’s Perseverance rover landed in Jezero Crater on February 18, 2021, targeting a paleolake basin and ancient river delta to search for signs of past microbial life. The mission leveraged a refined landing ellipse, Terrain-Relative Navigation, and thesky crane maneuver to set down safely inside a challenging but scientifically rich zone.
Primary Landing Target: Jezero Crater
Jezero Crater was selected as the primary landing site because orbital observations indicate it once hosted a lake fed by a river that built a delta, creating conditions that may have preserved evidence of past life. The crater spans about 45 kilometers in diameter and lies just north of the Martian equator.
Why Jezero Was Chosen
- Evidence of past liquid water and a river delta.
- Diverse rock types that can record environmental and potentially biological processes.
- Younger surface age than many ancient terrains, improving preservation of organic molecules.
Landing Coordinates and Precision
The rover targeted an ellipse roughly 7.7 by 6.6 kilometers, centered near fan deposits interpreted as delta material. The targeted coordinates place Perseverance among layered rocks and regolith that orbital imagery links to water-altered minerals.
| Attribute | Verified Detail | Source Type |
|---|---|---|
| Landing Site Name | Jezero Crater | IAU/NASA |
| Landing Coordinates (ellipse center) | Approximately 18.38°N, 77.58°E | NASA/JPL |
| Landing Date (EDT) | February 18, 2021 | NASA |
| Key Science Goal | Seek signs of past microbial life and collect samples for return | Mission Definition documents |
| Landing Technique | Terrain-Relative Navigation + sky crane | JPL/NASA |
The Entry, Descent, and Landing (EDL) Sequence
From atmospheric entry to surface touchdown, Perseverance used a combination of heat shield, parachute, and powered descent technologies. Key innovations include the Range Trigger and Terrain-Relative Navigation, which allowed the spacecraft to divert from a predetermined touchdown point toward safer terrain.
Landing Events at a Glance
| Date/Time (EDT) | Event | Why It Matters |
|---|---|---|
| Feb 18, 2021, 07:48:43 | Heat shield separation | Revealed landing radar and cameras |
| 07:49:36 | Parachute deploy | Slowed descent from supersonic to subsonic speeds |
| 07:51:54 | Backshell separation / sky crane fires | Final powered descent phase begins |
| 07:52:39 | Touchdown confirmed | Rover safely on surface in Jezero Crater |
Terrain-Relative Navigation and Hazard Avoidance
Terrain-Relative Navigation compared real-time images to onboard maps to identify safe zones within the landing ellipse. Hazard-avoidance cameras and lidar helped the system divert the rover away from boulders and steep slopes, enabling a safer touchdown than would have been possible with targeting alone.
Science Context and Sample Caching
At Jezero, Perseverance studies sedimentary deposits and collects rock and soil samples for a future return mission. The rover also carries instruments to characterize the present-day environment, including weather and dust, and to test technologies that could support future human exploration.
Key Instruments for Landing Site Science
- Mastcam-Z: High-resolution imaging and color panoramas.
- PIXL: Microscale X-ray spectroscopy for fine-scale chemistry.
- SHERLOC: UV Raman spectrometer to detect organics and minerals.
- SuperCam: Remote micro-imaging and spectroscopy.
Legacy and Comparisons
Perseverance’s landing ellipse overlaps earlier landing zones, including Curiosity’s site to the east. The improved targeting reflects lessons learned from previous Mars landings and enables access to geologically complex terrain that was previously considered too risky.
| Mission | Landing Site | Landing Date | Ellipse Size (approx.) |
|---|---|---|---|
| Spirit | Gusev Crater | Jan 4, 2004 | 20 × 18 km |
| Opportunity | Meridiani Planum | Jan 25, 2004 | 10 × 5 km |
| Curiosity | Gale Crater | Aug 6, 2012 | 20 × 10 km |
| Perseverance | Jezero Crater | Feb 18, 2021 | 7.7 × 6.6 km |
Status and Mission Health
As of the latest updates, Perseverance remains operational on the surface of Jezero Crater. The rover has completed hundreds of sols of science operations, traversed multiple geological units, and cached samples for future return. No credible evidence suggests the landing ellipse contained hazards that would prevent sustained operations.
Key Takeaways
- Perseverance landed in Jezero Crater on February 18, 2021.
- The site is an ancient lake basin with a river delta, chosen for high potential to preserve past life evidence.
- Advanced landing technologies enabled precision targeting despite complex terrain.
- The rover is actively collecting and caching samples and characterizing the landing site environment.
FAQ
Reader questions
Where did Perseverance land on Mars?
Perseverance touched down in Jezero Crater, an ancient basin that once held a lake and a river delta.
Why was Jezero Crater chosen for the landing?
Orbital data show clay- and carbonate-rich sediments, a clear delta, and diverse geology ideal for preserving signs of past life.
How did Perseverance land safely in such a rough area?
It used Terrain-Relative Navigation and the sky crane, which let the system assess the surface in real time and steer to a safe spot.
How big was the landing ellipse compared to earlier Mars missions?
Perseverance’s ellipse (about 7.7 by 6.6 km) is smaller than earlier ones, reflecting improved targeting and hazard-avoidance capabilities.