The S.S. Rick Husband approaches the capture position below the International Space Station. Photo Credit: NASA |
Once the spacecraft was about 33 feet (10 meters) below the station, NASA astronaut Tim Kopra, the commander of the orbiting laboratory, took control of the space station’s robotic arm to move in and grab the free-flying Cygnus. Capture took place at 5:51 a.m. CDT (10:51 GMT) when the cargo freighter and ISS were about 250 miles (402 kilometers) over the south Indian Ocean.
“We’re really honored to bring aboard the S.S. Rick Husband to the International Space Station,” said Kopra. “It recognizes a personal hero of so many of us and this will be the first Cygnus honoree who was directly involved with the construction of this great station.”
Tim Kopra and Tim Peake work in the Cupola module to grab the free-flying Cygnus from space. Photo Credit: NASA |
Getting the spacecraft below the CBM into the Ready To Latch position took a little longer than usual. Ground teams told the crew that because the robotic arm was fully stretched out, the procedure had to take place a little slower.
During final RTL alignments, the space station’s ground track took it away from video downlink. This caused the operators on the ground controlling the robotic arm to pause for about 30 minutes.
About an hour behind the timeline, berthing finally took place at 9:52 a.m. CDT (14:52 GMT) while the station was flying over the Pacific Ocean just west of Mexico.
The hatch between the station and Cygnus was opened the next day on Sunday. The crew will now begin the long process of unloading the thousands of pounds of cargo on board the spacecraft.
File photo of the Previous Cygnus berthed. This photo was taken during a space walk earlier in the year. Photo Credit: NASA |
The vehicle is expected to remain attached to ISS for about two months (55 days) before being loaded with trash and unberthed on May 20. After departing the vicinity of the outpost, Cygnus will remain in orbit for eight more days to conduct the Saffire experiment.
Saffire will help scientists and engineers understand how fires spread in large areas on certain materials.
Cygnus was the first of three planned cargo ship arrivals in the next two weeks. A new Russian Progress spacecraft will launch on March 31 and is scheduled to dock on April 2. Then a SpaceX Dragon will fly atop a “full thrust” Falcon 9 on April 8, before being berthed to the Harmony module on April 10.
Together, some 12 tons (10.8 metric tons) of cargo will be delivered in arguably the busiest time in the space station program’s history.
Video courtesy of NASA TV
Time lapse by Trent Faust
Read more work by Derek Richardson and others at Spaceflight Insider.
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