A refrigerator-size tank thrown from the space station in July 2007 will fall on Earth on Sunday, the U.S. space agency NASA said Friday.

NASA and the U.S. Space Surveillance Network, which tracks objects in space, is monitoring the movement of the 1,400-pound ammonia tank to determine where it will impact and caution people on the ground. Mike Suffredini, NASA's space station program manager, however, assured that there is "a very low likelihood that anybody will be impacted by it," according to Msnbc.com.

A video camera stand was thrown by a spacewalking NASA astronaut from the space station together with the ammonia tank and it burned up in the atmosphere early this year, Suffredini said.

NASA still expects some debris of up to 40 pounds to break off from the tank and hit land or the ocean at a speed of 100 miles per hour.