(Adds hatch opening and welcome of new crew aboard outpost, paragraphs 5-7)
By Joe Skipper and Steve Gorman
CAPE CANAVERAL, Fla., April 27 (Reuters) - Four astronauts, three from NASA and one from the European Space Agency, arrived at the International Space Station (ISS) on Wednesday and docked their SpaceX capsule, just two days after the last crew to depart the orbiting outpost returned to Earth.
Rendezvous of the Crew Dragon capsule with the station less than 16 hours after launch from NASA's Kennedy Space Center in Cape Canaveral, Florida, marked one of the fastest flights by Elon Musk's SpaceX to the ISS from liftoff to docking, NASA webcast commentators said.
The fully automated docking took place at about 7:37 p.m. EDT (2337 GMT) while the Crew Dragon capsule, dubbed Freedom, and the space station were flying about 260 miles (420 km) above the central Pacific Ocean, according to NASA.
The Freedom crew consists of three American NASA astronauts - flight commander Kjell Lindgren, 49; mission pilot Bob Hines, 47; and mission specialist Jessica Watkins, 33 - as well as Italian astronaut Samantha Cristoforetti, 45, of the European Space Agency (ESA).
After docking ahead of schedule to the station's Harmony module, crew members spent two hours conducting standard leak checks and pressurizing the chamber between the capsule and the ISS before opening the entry hatches.
A live NASA video feed showed the smiling new arrivals floating headfirst through the padded passageway one by one into the station. They were greeted with hugs and handshakes by the four-member team they will be replacing - three Americans and a German ESA crewmate due to end their mission next week.
Three Russian cosmonauts currently sharing the station but preparing for a spacewalk on Thursday were not present for the welcome.
The four latest astronauts, designated Crew 4, are the fourth full-fledged ISS crew NASA has launched aboard a SpaceX vehicle since the California-based rocket company began flying U.S. space agency astronauts in 2020.
RAPID FLIGHT TURNAROUNDS
SpaceX was founded in 2002 by Musk, the billionaire CEO of electric carmaker Tesla Inc who on Monday clinched a deal to buy social media platform Twitter. It has now launched seven human spaceflights over the past two years.
That includes a four-man team organized by Houston-based company Axiom Space that splashed down on Monday after a two-week stay aboard the ISS, capping the first all-private astronaut mission to the orbiting laboratory.
The Crew 4's predawn launch on Wednesday came just 39 hours after the Axiom team safely parachuted into the Atlantic off the Florida coast in a separate Crew Dragon capsule.