According to NASA, a spacecraft carrying Williams, Butch Wilmore and two other astronauts is set to undock from the International Space Station at 1:05 a.m. ET (10:35 am IST) and splash down off the coast of the American state of Florida at 5:57 pm ET (around 3 am, Wednesday, IST). According to NASA, a spacecraft carrying Williams, Butch Wilmore and two other astronauts is set to undock from the International Space Station at 1:05 a.m. ET (10:35 am IST) and splash down off the coast of the American state of Florida at 5:57 pm ET (around 3 am, Wednesday, IST).