Because of the recent Soyuz MS-10 launch abort, this date of this activity is under review and will likely be postponed.
Expedition 57 astronauts are slated to venture outside the International Space Station to continue the replacement of the outpost's batteries that started in early 2017.
U.S. EVA-52 is expected to be the first of two spacewalks that will see the replacement of the old nickel-hydrogen batteries on the station's P4 truss 4A power channel with new lithium-ion units. The outing is expected to start at 12:05 UTC Oct. 19, 2018, and should last about 6.5 hours.
These batteries are to be brought to the ISS inside the unpressurized section of the Japanese-built Kounotori 7 cargo ship. Only when the spacecraft successfully arrives with and is berthed to the outpost several days later will the two spacewalks be performed.
The old batteries will be placed in the spacecraft's unpressurized compartment for disposal in the northwestern Pacific Ocean at the end of Kounotori 7's mission.