"By tracking and listing these objects and making that information available, we enable spaceflight safety and increase transparency in the space domain", Chiles said.
It says that the Chinese space station may enter the Earth's atmosphere around 7:25pm tonight.
An abandoned Chinese space station is falling to Earth and it could hit as early as this weekend.
Space.com reports that the revised targets will change the likely debris fall area for Tiangong-1.
According to the agency, the chances of someone being hit by a piece of the space lab is 10 million times less than the annual probability of being hit by lightning.
Russia, Canada and northern Europe are all reported to be out of range.
Because there are so many unknowns about Tiangong-1's trajectory, observers can only give an educated guess.
On Monday 26 March, the space station was at an altitude of about 210 kilometres (130 miles).
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During the re-entry period for Tiangong-1, you might be able to see streaks in the sky, like a meteor shower, but that depends on several factors.
Many experts believe much of the craft is expected to burn up during the re-entry and no one knows for sure where debris from the spacecraft may land.
Zhu Zongpeng, the nation's chief space laboratory designer, insisted the process is in control - but hasn't given any details on what China is doing.
"This is a big thing the size of a school bus".
China has predicted most of its debris will fall in the ocean as it breaks up on descent.
In 1997 in Tulsa, Oklahoma, Lottie Williams got a bruise on her shoulder from a small piece of debris from a rocket launched the year before.
China was excluded from the 420-ton International Space Station mainly due to US legislation barring such cooperation and concerns over the Chinese space program's strong military connections. Expected to come crashing back to earth on April 1st sometime during the midday hours.
The Tiangong-1 was launched in September 2011 as a prototype for China's ultimate space goal: a permanent space station which is expected to launch around 2022. On this mission, the crew spent 11 days at the station and completed two dockings - one computer-controlled and one crew-guided.
China also plans to put a man on the moon and send a rover to Mars.