South Korea's National Space Situational Awareness Organization said on its website that the station is expected to re-enter the atmosphere sometime between 5:12am and 1:12pm Seoul time (2012 GMT to 0412 GMT) on Monday.
Markus Dolensky, technical director of the International Center for Radio Astronomy Research in Australia, said witnesses to the Tiangong-1 descent should see "series of fireballs" streaking across the sky - provided there were no clouds.
According to NBC News, what experts do know is that it is highly unlikely that large pieces of the Tiangong-1 will survive re-entry through Earth's atmosphere, much less impact any populated area, but even scientists are skeptical.
China successfully launched Tiangong-1 into space in September 2011 and, since then, the country's first prototype space station has performed a variety of useful operations.
Speaking at a daily news briefing, foreign ministry spokesman Lu Kang said the government had been continually informing the United Nations space agency of the latest information about the Tiangong-1. Tiangong means "heavenly place" but Logsdon says, "it's just one or more than a half a million pieces of space junk orbiting the Earth".
An online tracking hub set up by the Aerospace Corporation suggests the Tiangong-1 is now orbiting above the South Atlantic Ocean.
THE out-of-control Chinese space station has crashed into the Pacific and was "mostly" destroyed on re-entry, officials confirmed. While most parts of the falling space lab are likely to burn in the Earth's atmosphere upon reentry, there is a slight chance of a little debris, containing toxic hydrazine, reaching the surface of the Earth.
An out-of-control Chinese space station is expected to reenter the Earth's atmosphere Easter Sunday but exactly when or where it will make its appearance isn't yet known.
Because there are so many unknowns about Tiangong-1's trajectory, observers can only give an educated guess.
The re-entry latitude of the Tiangong-1 is expected to be within 43 degrees north and 43 degrees south of the equator, a huge swath of the earth which stretches from NY to Cape Town.
Two years later, Tiangong-1 is slated to return. A third astronaut slept in the Shenzhou spaceships that docked with the station, which also contained facilities for personal hygiene and food preparation. Space.com has highlighted the likelihood of the module coming down on Sunday, a crash that would coincide with Easter and April Fool's Day.
China hasn't controlled the Tiangong-1 modular space station for over two years now.
These missions proved the viability of China's space station tech (another test platform, Tiangong-2, was launched in 2016), and in 2013 Tiangong-1, having accomplished what its creators set out to do, was deactivated. It plans to send a manned mission to the moon in the future.