Astronauts aboard the International Space Station used the robotic arm to snare a commercial cargo ship and bring it aboard this morning while traveling at five miles per second.

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Cygnus became part of the International Space Station at 10:52 a.m. EDT when the 16 bolts were fully engaged and tightened. The cargo ship will spend the next 55 days at the outpost -- through May 20 -- being unloaded and then filled with trash for disposal.

Bolting is now underway to connect Cygnus to the Unity module, which was the first U.S. element of the International Space Station launched.

The "ready-to-latch" indicators are green, giving the crew the OK to proceed with mechanically bolting the Cygnus in place. Sixteen electrically-driven bolts in the Common Berthing Mechanism will be engaged to affix the visiting vehicle.

With Cygnus now mere inches away from its home at the International Space Station, the astronauts and flight controllers are awaiting four "ready-to-latch" indicators to show the vessel is seated into the berthing port.

VIDEO: If you missed this morning's Cygnus grapple, here is a replay.

Over the next couple of hours, Mission Control will remotely operate the robot arm to swing Cygnus under the Unity module and maneuver the freighter into position at the berthing port. Then, the astronauts will resume their involvement and command electrically-driven bolts inside the berthing port to affix Cygnus to the International Space Station.

Television is scheduled to resume around 9:15 a.m. EDT (1315 GMT).

The capture came 252 miles over the Indian Ocean, about 80 hours after liftoff from Cape Canaveral aboard the Atlas 5 rocket.

Capture confirmed at 6:51 a.m. EDT! The station's robot arm, under the control of Expedition 47 commander Tim Kopra, extended itself to reach a grapple pin on the Cygnus and close snare wires around the pin fixture to firmly grasp the vessel.

Canadarm2 of the International Space Station is in motion, reaching out to grab Cygnus.

Flight director Gary Horlacher in Houston has given the go for capture to the crew aboard the space station.

Cygnus has arrived in the imaginary box for capture. The spacecraft will be placed in "free drift" mode, disabling its control thrusters to prevent any sudden movements while the robot arm is grabbling the freighter and ensuring it won't fight against the arm's capture.

The craft should reach the capture point in about five minutes. Current distance is 66 feet away.

Now 82 feet.

Cygnus is moving to the capture point now.

Go for final approach!

Now holding at the waypoint of 102 feet for a final systems check before resuming the approach to within reach of the International Space Station's robotic arm.

Distance now just 131 feet.

Now 330 feet separating the two spacecraft as they fly 255 miles over western Canada.

The latest estimate for the capture time is 6:47 a.m. EDT (1047 GMT).

Now 650 feet and closing. The astronauts have the authority from this point forward to issue an abort command to Cygnus.

Inside the Cupola at the robotics workstation is prime arm operator Tim Kopra, the Expedition 47 commander, and backup operator Tim Peake of the European Space Agency. Kopra will be at the controls for the capture a short time from now.

Flight director Gary Horlacher in Houston has given approval for Cygnus to proceed from its current 820-foot holdpoint. The vessel will move to within 98 feet where the next pre-planned pause will occur.

Cygnus is 820 feet away from the station, continuing this morning's rendezvous. All is reported nominal as this three-day trek from the launch pad nears its destination.

Good morning and welcome to live coverage of the Orbital ATK Cygnus cargo ship arriving at the International Space Station. The craft continues to slowly rise from beneath the station for capture about an hour from now.

Cygnus is less than 3,300 feet from the station now. The crew has a visual sight on the craft. About 90 minutes to capture.

Cygnus is 11.8 miles behind the space station and 2.5 miles below at present.

"We are looking forward to it," station commander Tim Kopra says of the upcoming capture.

"We got your back," said Jeremy Hansen, Canadian Space Agency astronaut serving as CAPCOM in Houston.

The International Space Station crew is awake for its Saturday in orbit, which is arrival day for the commercial Cygnus cargo ship. The freighter is about 30 miles away and closing for arrival in less than four hours.

Cygnus will complete its rendezvous with the space station when NASA astronaut Tim Kopra, awaiting at the controls of the Canadarm2, will reach out and grab the freighter around 6:40 a.m. EDT (1040 GMT). It will be berthed to the Unity connecting module for unloading.

"The crew onboard the station gets involved about two hours before they actually grapple Cygnus," said Dan Tani, former space shuttle and station astronaut and now the senior director for mission and cargo operations at Orbital ATK.

"Their job is to watch the vehicle as it’s coming in and command the Cygnus to go into free-drift. This means it cannot control itself. That way, when they do grapple it, the spacecraft won’t be fighting the force of the arm."

The Centaur upper stage launching the Cygnus space freighter Tuesday persevered through a velocity shortfall from the first stage of the Atlas 5 rocket, improvising with a longer firing to reach the correct orbit.

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An Atlas 5 rocket successfully launched another Cygnus cargo freighter for Orbital ATK Tuesday night, fulfilling the booster's role of reestablishing America's resupply link to the International Space Station.

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METEOR: Peering down at the Earth’s atmosphere from a research window aboard the International Space Station, a new science instrument launching Tuesday will compose unprecedented characterizations of the chemical makeup of shooting stars.

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SAFFIRE: Working via remote control this spring, scientists will spark a fire aboard the unmanned Cygnus cargo ship that launches next Tuesday to study how the deliberate flames spread in weightlessness.

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