WASHINGTON (AP) – A small asteroid was headed for a fiery but harmless dive into Earth’s atmosphere early Tuesday morning over Africa, astronomers said in a first of its kind advance warning.

Harvard scientists announced late Monday afternoon that the asteroid 2008 TC3 would burn up in the sky, making a fireball potentially visible to people in northern Africa. Measuring between 3 feet and 15 feet in diameter, the rock was expected to enter Earth’s atmosphere above Sudan at 10:46 p.m. EDT Monday, just before dawn in Africa.

Harvard astronomer Tim Spahr said the asteroid was so small it wouldn’t reach the ground before burning up and wouldn’t hurt anyone, but the fireball should be seen heading from west to east.

“It’s the first time we’ve been able to predict an impactor in advance and it’ll be quite a celestial show for the world,” said Donald Yeomans, manager of NASA’s Near Earth Object program, which tracks asteroids and comets that come close.

There are 5,681 such objects, but only 757 of them are large enough to cause any damage if they hit Earth.

This object, spotted by an Arizona telescope late Sunday and calculated on Monday to be heading toward Earth, isn’t one of them. Astronomers don’t know precisely how big it is or what it is made of, but they know that it is small enough that it will burn up harmlessly. As it enters the atmosphere becoming a meteor, it compresses the air in front of it, which then gets hotter, causing a fireworks display.