TechnicalLEO
Low Earth Orbit
Orbital regime from approximately 160 km to 2,000 km altitude, the most congested region of space and primary focus of debris mitigation efforts.
Low Earth Orbit (LEO) is the most utilized and congested orbital regime, hosting the majority of operational satellites, space stations, and debris.
Orbital Characteristics
- Altitude: 160-2,000 km
- Period: 88-127 minutes
- Typical lifetimes: Months to decades (depending on altitude)
Applications
- Earth observation
- Communications constellations
- Scientific research
- Human spaceflight
- Technology demonstration
Debris Environment LEO contains the highest concentration of:
- Tracked objects (~70% of catalog)
- Small untracked debris
- Collision risk
EU Space Act proposal (COM(2025) 335, not in force) Union spacecraft operators in LEO would have to:
- Keep the post-mission orbital lifetime within the limit of an implementing act (Annex V point 3.4.2) — the proposal sets no year figure
- Subscribe to the EU collision avoidance services (Art. 64)
- Have manoeuvrability for orbits with an apogee above 400 km (Art. 66)
- Draw up debris mitigation plans (Art. 70(2))
Mega-Constellations LEO is seeing unprecedented growth with constellations like:
- Starlink (SpaceX)
- OneWeb
- Amazon Kuiper
- EU IRIS²
This drives urgent need for updated debris mitigation requirements.