# PROSPECT (ESA)

**Full Name:** Package for Resource Observation and in-situ Prospecting for Exploration, Commercial exploration and Transportation

**Type:** Lunar ISRU demonstration payload

**Developer:** European Space Agency (ESA)

**Mission:** CP-22 (CLPS), Intuitive Machines IM-4

**Landing Site:** Mons Mouton, lunar south pole

**Launch/Landing:** No earlier than 2027 (slipped from earlier 2026 target)

## Components

**ProSEED drill:**
- Acquires cryogenic samples from depths up to 1 meter
- Delivers samples to ProSPA analytical laboratory

**ProSPA analytical laboratory:**
- Receives and seals samples in miniaturized ovens
- Heats samples and physically/chemically processes released volatiles
- Analyzes constituents via two types of mass spectrometers
- **ISRU demonstration capability:** Thermal-chemical reduction of samples with hydrogen to produce water/oxygen

## Significance

PROSPECT will be the first in-situ demonstration of ISRU chemistry on the lunar surface. While small-scale (proof of concept), it represents the transition from laboratory-simulated ISRU to actual lunar surface demonstration. The mission is a critical validation step for Phase 2 operational ISRU systems targeted for 2029-2032.

## Heritage

ProSEED/ProSPA instrument heritage from Mars Sample Return development programs. Part of ESA's broader Lunar Exploration initiative.

## Timeline

- **2026-04-13** — Mission confirmed as IM-4 (CP-22), targeting no earlier than 2027 launch/landing (slip from earlier 2026 target)

## Sources

- NASA Science CLPS CP-22 mission page
- ESA PROSPECT mission documentation
- NSSDCA mission records