An asteroid with its own mini orbiting moon will fly past the Earth this weekend, and astronomers are very excited. Asteroid 1999 KW4 is known as a “binary object” because it is made up of two asteroids that are gravitationally bound together. The larger asteroid is just under a mile in diameter, and its companion asteroid “moon” is about a third of that size. It will make its closest approach to Earth on Saturday, May 25, giving scientists an opportunity to observe it using telescopes on the ground.
The European Space Agency (ESA) has been tracking the asteroid, and says it is steadily getting brighter as it nears our planet. Earlier this week, ESA shared a grainy animation composed of two 90-second exposures, obtained on 9 May with the 0.6 m telescope at the Ob
Source link : Mirror
Author : Sophie Curtis
Publish date : 2019-05-24T17:39:00Z
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