Asteroid 138971 watch LIVE – Huge 'potentially dangerous' space rock 3 times bigger than Empire State to pass tomorrow

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A GIGANTIC asteroid is making its way towards Earth and Nasa has labelled it as "potentially hazardous."

The US space agency expects the large space rock to shoot past us tomorrow at a "close" distance and you should be able to watch it live.

Asteroid 138971 (2001 CB21)  is said to be up to 4,265 feet wide.

That makes it almost three times as big as the Empire State Building, but the good news is, it's not expected to hit Earth.

Space fans should be able to watch the asteroid as it shoots past Earth thanks to the The Virtual Telescope Project 2.0.

The live feed will start at 10pm ET on March 4 (3am GMT March 5).

You can also track Asteroid 138971 (2001 CB21) virtually at NASA Jet Propulsion Laboratory's Small-Body Database Lookup website. 

Read our Asteroid 138971 live blog for the latest news and updates…

  • Josie Rhodes Cook

    Rare occurrence

    The asteroid won't come within around 3 million miles again until 2043.

    So, space fans should try to watch the asteroid as it shoots past Earth thanks to the The Virtual Telescope Project 2.0, or they won't get another chance to spot it anytime soon.

  • Josie Rhodes Cook

    How fast is the asteroid?

    Nasa thinks Asteroid 138971 (2001 CB21) will fly by Earth at around 27,000 miles per hour in the early hours of March 4.

    That means it will be traveling 18 times faster than a Lockheed Martin F-16 jet fighter does at full speed.

  • Josie Rhodes Cook

    'Potentially hazardous'

    Any fast-moving space object that comes within 4.65 million miles is considered to be "potentially hazardous" by cautious space organizations, and the asteroid is expected to fly by Earth on March 4 from an estimated distance of 3million miles away.

    One small change to the trajectories of any NEOs could spell disaster for Earth.

    Nasa thinks Asteroid 138971 (2001 CB21) will speed past Earth at around 27,000 miles per hour in the early hours of that day.

  • Josie Rhodes Cook

    What is a NEO?

    Nasa considers anything passing near Earth's orbit a Near-Earth Object (NEO).

    Thousands of NEOs are tracked by scientists to monitor whether they're on a collision course with our planet.

  • Josie Rhodes Cook

    How close will the asteroid get?

    Asteroid 138971 should shoot past us on March 4 from an estimated distance of 3million miles away.

    A few million miles might sound pretty far away, but it's actually quite close in terms of space.

    By comparison, the Moon is only about 238,900 miles from Earth.

  • Josie Rhodes Cook

    Will the asteroid hit Earth?

    The good news is, Asteroid 138971 is not expected to hit Earth.

    An asteroid of this size would do some serious damage to the planet.

  • Josie Rhodes Cook

    Empire State asteroid

    Asteroid 138971 (2001 CB21)  is said to be up to 4,265 feet wide, making it almost three times as big as the Empire State Building.

    The Empire State Building stands at around 1,453 feet tall, so it would pale in comparison to Asteroid 138971 (2001 CB21).

  • Josie Rhodes Cook

    Passing 'close' to Earth

    Asteroid 138971 is making its way towards Earth and Nasa has labeled it as "potentially hazardous."

    The US space agency expects the large space rock to shoot past us at a "close" distance.

  • Josie Rhodes Cook

    Tracking the asteroid

    You can also track Asteroid 138971 (2001 CB21) virtually at NASA Jet Propulsion Laboratory's Small-Body Database Lookup website. 

  • Josie Rhodes Cook

    How to watch

    Space fans should be able to watch the asteroid as it shoots past Earth thanks to the The Virtual Telescope Project 2.0.

    The live feed will start at 10pm ET on March 4 (3am GMT March 5).

  • Josie Rhodes Cook

    How big is the asteroid?

    Asteroid 138971 (2001 CB21) is said to be up to 4,265 feet wide.

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