FILE - In this Tuesday, May 22, 2012 file photo, the SpaceX Falcon 9 rocket lifts off from space launch complex 40 at the Cape Canaveral Air Force Station in Cape Canaveral, Fla. The privately built space capsule that's zipping its way to the International Space Station has also launched something else: A new for-profit space race. (AP Photo/John Raoux)
FILE - In this Tuesday, May 22, 2012 file photo, the SpaceX Falcon 9 rocket lifts off from space launch complex 40 at the Cape Canaveral Air Force Station in Cape Canaveral, Fla. The privately built space capsule that's zipping its way to the International Space Station has also launched something else: A new for-profit space race. (AP Photo/John Raoux)
CAPE CANAVERAL, Florida (AP) ? The world's first private supply ship flew tantalizingly close to the International Space Station on Thursday but did not stop, completing a critical test in advance of Friday's actual docking.
The unmanned SpaceX Dragon capsule performed a practice lap around the orbiting lab and checked out its communication and navigation systems.
Officials at the U.S. space agency, NASA, and the SpaceX company said the rendezvous went well, although test results still were being analyzed.
It is the first U.S. vessel to visit the space station since NASA's shuttles retired last summer ? and the first private spacecraft to ever attempt a delivery. The Dragon is carrying 1,000 pounds (453 kilograms) of provisions.
The space station astronauts struggled with bad computer monitors and camera trouble as the Dragon zoomed toward them, but the problem did not hold up the operation.
The astronauts successfully turned on Dragon's strobe light by remote control, but could not see it because of the sun glare and distance. The Dragon finally popped into camera view about 10 minutes later, appearing as a bright speck of light against the blackness of space, near the Earth's blue horizon. The two solar wings were clearly visible as the Dragon drew closer.
"Can nicely see the vehicle," Dutch spaceman Andre Kuipers said.
On Friday, two of the space station's six astronauts, Kuipers and Donald Pettit, will use the space station's robot arm to grab the Dragon and attach it to the complex. The crew will have a week to unload the contents before releasing the spacecraft for re-entry. It is the only supply ship designed to return to Earth with experiments and equipment; the others burn up in the atmosphere.
SpaceX's objective is to help stockpile the space station, joining Russia, Europe and Japan in resupply duties. In three or four more years, however, the California-based company run by the billionaire who co-founded PayPal, Elon Musk, hopes to be launching station astronauts.
It is the cornerstone of President Barack Obama's strategy for NASA: turning over orbital flights to private business so the space agency can concentrate on destinations farther afield, like asteroids and Mars.
Obama called Musk on Wednesday, a day after Dragon's flawless launch from Cape Canaveral, Florida.
"The President just called to say congrats. Caller ID was blocked, so at first I thought it was a telemarketer," Musk said via Twitter early Thursday.
Musk monitored Thursday's operation from the SpaceX Mission Control in California.
The space station and Dragon will be visible from select locations on Earth in the pre-dawn hours Friday. Among the many U.S. cities with viewing opportunities if skies are clear are New York, Los Angeles, Washington, Chicago and Jacksonville, Florida.
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