THIS Halloween just got a whole lot scarier with the discovery of a huge asteroid hurtling towards Earth.

The space rock, dubbed 2015 TB145, was only discovered less than a fortnight ago by astronomers using the Pan-STARRS telescope in Hawaii.

“The asteroid is on an extremely eccentric and high inclination orbit,” explained NASA.

With the asteroid expected to come within the 7,500,000km threshold of proximity to Earth, it has been classified as a potentially hazardous object.

Although NASA is confident the asteroid will fly past our planet some 499,000km away, while cruising at speeds over 126,000km per hour.

Despite missing Earth, experts monitoring the space debris estimate the fly-by will be the closest an asteroid has come to our home planet in close to a decade.

They also expect it will be another 12 years before we experience something similar.

“This is the closest approach by a known object this large until 1999 AN10 approaches within 1 lunar distance in August 2027,” said NASA.

Despite being estimated to be somewhere between 280 to 260 metres in diameter, space fans will still need a telescope to grab a glimpse of the giant rock as it passes Earth.