Sky-Watcher Heliostar 76Ha · ZWO ASI183MM Pro · Player One S-Series ERF 1.25" · MLAstro SAL-33 · ZWO EAF · Adobe Photoshop · AstroSharp Ltd SharpCap · Emil Kraaikamp AutoStakkert! · Filip Szczerek ImPPG (Image Post-Processor) · Markus Enzweiler StarStaX
Integration
4000 × 0.65ms
Sky-Watcher Heliostar 76Ha (76/630mm) A short 15 km trip to Magenta (MI), Italy, to capture an ISS solar transit. What makes this specific event exceptionally rare is that the transit occurred precisely during a scheduled, live ARISS (Amateur Radio on the International Space Station) contact! Exactly as the ISS was silhouetted against the solar disk at 09:32 UT, French astronaut Sophie Adenot was inside the Columbus Module (using the OR4ISS callsign) actively speaking with students from Collège Jorge Semprun & Ecole primaire Henri Clément in Saint-Rémy and Gueugnon, France. The radio contact window was open between 09:26 and 09:37 UTC. This makes this 0.61-second transit not just a lucky visual alignment, but a snapshot of an active human connection between space and Earth. ISS transit data: Time 05 Jun 2026, 09:33:14.40 UT Distance 489.98 km Altitude 421 km ISS angular size 55.39" ISS velocity 51.1'/s Center line distance 0.4 km Visibility path width 5.33 km SharpCapVersion=4.1.14136.0 ZWO ASI183MM Pro Pan=1216 Tilt=472 Binning=1 Capture Area=3200x3200 Colour Space=MONO8 Flip=None Gain=150 Exposure=0,6500ms Cooler Power=50 Temperature=-1 Target Temperature=0 Cooler=On Focuser Temperature=35,15999984741211 StartCapture=2026-06-05T09:32:03.4110582Z MidCapture=2026-06-05T09:33:45.3333087Z EndCapture=2026-06-05T09:35:27.2555593Z Duration=203,845s FrameCount=5011 ActualFrameRate=24,5825fps TimeZone=+2,00 Light=4000 Dark=NA Flat=NA DarkFlat=NA AutoStakkert.exe (4.0.11) Stacking=10% QualityType=2(auto) AP Size=64 Stack quality 33140.57659266 Median quality 107.53 ( quantiles 100.35, 107.53116.01)
