Publications de Stephan Hellmich

A method for asteroid detection using convolutional neural networks on VST images

Mathieu Salzmann, Jean-Paul Richard Kneib, Elisabeth Andréa Cécile Rachith, Stephan Hellmich

Context. The study of asteroids, particularly near-Earth asteroids, is key to gaining insights into our Solar System and can help prevent dangerous collisions. Beyond finding new objects, additional observations of known asteroids will improve our knowledg ...

2025

Swiss Space Sustainability Research Days 2025 - Book of Abstracts

Jean-Paul Richard Kneib, Elisabeth Andréa Cécile Rachith, Thibault Antoine Marie Joseph Ghesquière-Diérickx, Emmanuelle Brigitte Marie David, Carolyn Marie Crichton, Stephan Hellmich

The first Swiss Space Sustainability Research Days, held from January 6–8, 2025, in Les Diablerets, brought together over 50 experts from Swiss research institutions and industry. Participants explored key topics including the environmental impact of space ...

2025

Sustainable Solutions in the Space Sector: Factors Determining the Perception of the Opportunity Landscape by Key Players in the Space Industry

Emmanuelle Brigitte Marie David, Stephan Hellmich

In essence, the problem of orbital pollution is a tragedy of commons. Space does not belong to anyone, thus, there is a tendency to exploit it excessively without accountability for mitigating the resulting consequences. While sustainable space solutions h ...

International Astronautical Federation, IAF2024

In-situ observations of resident space objects with the CHEOPS space telescope

Stephan Hellmich

The CHaracterising ExOPlanet Satellite (CHEOPS) is a partnership between the European Space Agency and Switzerland with important contributions by 10 additional ESA member States. It is the first S-class mission in the ESA Science Programme. CHEOPS has bee ...

Elsevier BV2024

Shape Models of Lucy Targets (3548) Eurybates and (21900) Orus from Disk-integrated Photometry

Stephan Hellmich

We use our new light curves, along with historical data, to determine the rotation state, photometric properties, and convex shape models of the targets of the Lucy mission (3548) Eurybates and (21900) Orus. We determine a retrograde spin for both targets, ...

IOP Publishing Ltd2023

Reflectivity of Venus's Dayside Disk During the 2020 Observation Campaign: Outcomes and Future Perspectives

Stephan Hellmich

We performed a unique Venus observation campaign to measure the disk brightness of Venus over a broad range of wavelengths in 2020 August and September. The primary goal of the campaign was to investigate the absorption properties of the unknown absorber i ...

IOP Publishing Ltd2022