Russia’s Progress 73 cargo craft stands at its launch pad at the Baikonur Cosmodrome in Kazakhstan.
|Mission type||ISS resupply|
|Spacecraft||Progress MS-12 (No.442)|
|Start of mission|
|Launch date||31 July 2019|
|Launch site||Baikonur Site 31/6|
|Docking with ISS|
|Docking date||31 July 2019|
The launch was planned for 1 July 2018, rescheduled for 5 June 2019 and rescheduled to 31 July 2019.
Progress MS-12 docked with the Pirs docking module. The docking took place 3 hours 18 minutes 31 seconds into the mission (a new record time).
The Progress MS-12 spacecraft delivered 1164 kg of dry cargo (in the cargo compartment), 420 kg of water (in the Rodnik-system tanks), 51 kg of oxygen (in pressurized bottles), 850 kg of propellant in the refueling section and 880 kg of propellant in the integrated propulsion system to the International Space Station. The dry cargo consisted of: 394 kg of hardware for onboard systems, 27 kg of medical supplies, 1 kg of personal protective gear, 190 kg of hygiene items, 7 kg of repairs and servicing equipment, 20 kg of means of crew support, 282 kg of food, 13 kg of payloads, 38 kg of structural components and other hardware and 192 kg of NASA cargo. 
- NASA Office of Inspector General (June 28, 2016). NASA’s Response to SpaceX’s June 2015 Launch Failure: Impacts on Commercial Resupply of the International Space Station (PDF) (Report). NASA Office of Inspector General. p. 13. Retrieved 2016-07-18.