Around and around it goes, when and where it stops, nobody knows. China's Tiangong-1 space station is making its last orbits around Earth and a skywatcher in Oklahoma has captured one last video of the space lab before its inevitable crash.

Thomas Dorman is a satellite tracker from Tahlequah, Oklahoma. He has been documenting flyovers of Tiangong-1 using telescopes, binoculars, video and still cameras, a DVD recorder, a computer and other gear since the space lab's launch back in September 2011. On Saturday (March 31), Dorman managed to capture a final video of Tiangong-1 in a farewell of sorts. In the video, Tiangong-1 appears as a bright dot zipping from the upper left to lower right. The bright star in the frame is Polaris. [China's Falling Space Station: Everything You Need to Know]

"I was able to spot Tiangong-1 this morning," Dorman told Inside Outer Space. Dorman said he caught Tiangong-1 on video despite high clouds and wind. The space station was still intact and not shedding any fiery debris, he added. 

"It was zipping right along! No ablation observed!" Dorman said, adding that Tiangong-1 appeared in his Saturday morning sky about 14 seconds earlier than he expected based on orbital data. 

"This is most likely our last chance to observe Tiangong-1," Dorman wrote on Vimeo, where he posted the video, adding that cloudy weather would likely prevent a Sunday morning viewing. "Enjoy." 

China's first space station Tiangong-1, shown here in an artist's illustration, is expected to fall to Earth late April 1 or early April 2, 2018.
China's first space station Tiangong-1, shown here in an artist's illustration, is expected to fall to Earth late April 1 or early April 2, 2018.
Credit: China Manned Space Engineering Office

As of this morning (April 1), China's Tiangong-1 is expected to crash to Earth sometime between late tonight and early Monday (April 2). 

A European Space Agency forecast predicts Tiangong-1's re-entry will occur sometime between midnight and early Monday morning. Meanwhile, a forecast from the U.S.-based analysis group Aerospace Corp. predicts Tiangong-1 will likely fall to Earth tonight at 8:10 p.m. EDT (0010 April 2 GMT), give or take 2.5 hours. 

This map by the European Space Agency shows the area in which China's Tiangong-1 space station could fall (shown in green) around April 1, 2018.
This map by the European Space Agency shows the area in which China's Tiangong-1 space station could fall (shown in green) around April 1, 2018.
Credit: European Space Agency

Exactly where the school bus-sized Tiangong-1 will fall remains unknown. The spacecraft, which weighs 9.4 tons (8.5 metric tons), could fall anywhere along its remaining orbital path between the latitudes of 43 degrees north and 43 degrees south, experts have said. 

You can track Tiangong-1's fall using the Aerospace Corp.'s dashboard here, which uses data from U.S. Air Force radar tracking systems and telescopes. You can also follow Tiangong-1 using this satellite tracker by N2YO.com. 

Editor's note: If you spot Tiangong-1 streaking across your sky during its re-entry and capture video or images of the descent, let us know! You can send images and video in to spacephotos@space.com

Visit Space.com today for complete coverage of the Tiangong-1 re-entry.

Leonard David is author of "Mars: Our Future on the Red Planet," published by National Geographic. The book is a companion to the National Geographic Channel series "Mars." A longtime writer for Space.com, David has been reporting on the space industry for more than five decades. Follow us @SpacedotcomFacebook or Google+. Originally published on Space.com.