HAWTHORNE, Calif.—Hawthorne-based SpaceX will attempt Oct. 30 to launch its third group of astronauts to the International Space Station as part of its contract with NASA’s Commercial Crew Program to shuttle personnel to the orbiting outpost. The four-member crew is scheduled to launch atop a SpaceX Falcon 9 rocket from Cape Canaveral in Florida at 11:21 p.m. Saturday California time. If the launch is postponed for any reason, a backup launch window opens at 10:10 p.m. California time Nov. 3. Flying aboard the SpaceX Crew Dragon spacecraft Endurance will be NASA astronauts Raja Chari, mission commander; Tom Marshburn, pilot; and Kayla Barron, mission specialist. Also aboard will be European Space Agency astronaut Matthias Maurer, also a mission specialist. The astronauts—dubbed Crew-3, as part of SpaceX’s third official manned flight to the space station—are expected to arrive at the station early Monday morning. They will be greeted upon arrival by the …