7284 20250113185413.0 10.25518/0037-9565.12342 DOI SCART-2025-0026 Blomme, R. The colliding-wind binary HD 168112 2024 HD 168112 is a non-thermal radio emitter that has only recently been confirmed as a spectroscopic binary by Putkuri et al. (2023, DOI: 10.1093/mnras/stad2657). We use an independent set of spectroscopic observations to determine its orbital parameters. We also analyse radio observations we collected around its periastron passage. While other orbital phases clearly show non-thermal emission, the phases near periastron are thermal and are dominated by the free-free emission in the colliding-wind region. NO binaries: spectroscopic stars: early-type stars: individual (HD 168112) radio continuum: stars Rauw, G. Volpi, D. Nazé, Y. Abdul-Masih, M. Bulletin de la Société Royale des Sciences de Liège 93 2024 3 262-267 ronny.blomme@ksb-orb.be https://popups.uliege.be/0037-9565/index.php?id=12342 published in REFERD