Asteroid alert: NASA tracks a 557FT asteroid on Earth 'close approach' - But will it hit?

Asteroid BR1 is a fast-moving NEO or near-Earth object crossing Earth’s orbit of the Sun.

The space rock was first spotted by NASA in the solar system on January 17, and the space agency has tracked the asteroid more than 30 times since.

The observations have allowed NASA to determine the rock’s size, speed and trajectory.

NASA said: “Near-Earth Objects (NEOs) are comets and asteroids that have been nudged by the gravitational attraction of nearby planets into orbits that allow them to enter the Earth’s neighbourhood.

"Composed mostly of water ice with embedded dust particles, comets originally formed in the cold outer planetary system while most of the rocky asteroids formed in the warmer inner solar system between the orbits of Mars and Jupiter.

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