rootbrowseIAC-19A6session 44. Mitigation - Tools, Techniques and ChallengesPapers1. Debris mitigation, how to change an “ugly duckling” satellite in a “swan” satellite : the example of Microscope2. Long-term simulations to assess the effects of drag and solar sails on the space debris environment3. Kicking the space junk habit4. Environment capacity as an early mission design driver5. Environmental Sustainability of Large Satellite Constellations in Low Earth Orbit6. The H2020 ReDSHIFT project: a successful European effort towards space debris mitigation7. Comparison of Disposal Options for Tundra Orbits in Terms of Delta-V Cost and Long-Term Collision Risk8. Debris collision mitigation from the ground using laser guide star adaptive optics at Mount Stromlo Observatory: results from the first artificial star ever created in Australian skies9. DRAMA 3.0 - Upgrade of ESA’s Debris Risk Assessment and Mitigation Analysis Tool Suite10. Aerothermodynamics modelling of complex shapes in the DEBRISK atmospheric reentry tool: methodology and validation