NASA predicts 'near miss' with giant asteroid this Halloween

NASA predicts that a giant 2.5km wide asteroid named 2015 TB145 will zoom past Earth at 125,500km/h around 499,000 kilometres away - the closest since July 2006.

The space agency has described the asteroid as "hazardous" as it falls well within the 7360000km threshold of proximity to Earth. Despite NASA's constant scanning and tracking asteroids, the 2015 TB145 was spotted on October 10. The space agency explained that it was spotted at such short notice due to the asteroid's extremely eccentric and high-inclination orbit.

Despite it's erratic orbit and close pass, NASA is confident that it will not hit Earth. 

The next recently observed major object, 2015 RN35, is currently projected to come relatively close earth anytime from 2038 to 2114.

None of the thousands of objects on NASA's risk monitoring system are regarded as likely to impact earth greatly. The maximum detected hazard rating using the Torino Impact Hazard Scale is 10. A Torino Scale rating of 1 indicates an event that "merits careful monitoring" but currently all threats have been marked at zero.

Although you won't be able to see the asteroid with the naked eye , it will be visible with a telescope. People can also monitor the comets and asteroids themselves by typing the name of the rock into JPL's Small-Body Database Browser.