Overview
- The Progress MS-35 vehicle lifted off from Baikonur on Wednesday, Sept. 16 at 9:33 a.m. EDT on a Soyuz 2.1b after a successful ascent and orbital insertion reported by multiple agencies.
- Roscosmos says the spacecraft carries about 2,600 kilograms of pressurized and unpressurized cargo including food, science supplies, maintenance hardware, propellant that can be pumped into Zvezda, potable water and atmospheric gases.
- The flight follows a Sept. 9 launch scrub that prompted rollback of the Soyuz for inspection and repair of a third‑stage issue before the rocket returned to the pad for today’s launch.
- Progress will spend roughly 48 hours in orbit for a multi‑orbit chase and is scheduled to dock to the ISS Poisk zenith port using the automated Kurs‑NA system with the manual TORU backup available; some outlets list slightly different docking times for Sept. 18–19.
- The mission will stay attached for about five months so crew can unload supplies and load waste, after which Progress will be deliberately deorbited for destructive reentry over the Pacific, continuing the long‑running role of Russia’s expendable cargo fleet in keeping the station operating.