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Asteroid 2004 BL86 to Fly By Earth

Update: This event has passed

At 16:20 UTC on Monday, January 26, 2015, asteroid 2004 BL86 flew by Earth at a distance only 3 times greater than the distance between Earth and Moon. People in North and South America, Europe and Africa will have front row seats for the event.

Illustration image

2004 BL86 will fly by Earth on Jan 26, 2015.

2004 BL86's path as of Jan 19. The Asteroid will fly by Earth on Jan 26, 2015.


All you will need to see this space rock is a small telescope or a pair of strong binoculars!

Due to time zone differences, the event will occur on Tuesday, January 27, 2015 at locations following a time zone of UTC+8 or more.

Time in my city when 2004 BL86 is closest to Earth

With an approximate diameter of 0.31 miles (500 meters), 2004 BL86 will be the largest known asteroid to come this close to the Earth until August 7, 2027 when asteroid 1999 AN10 will zoom past the Earth.

10 Things About Asteroids You Must Know

Thrice the Lunar Distance

According to astronomers, at its closest point the asteroid will be around 745,000 miles (1.2 million km) from the Earth’s surface. This is about 3.1 times the average distance between the Moon and the Earth.

Moon Distance Calculator

2004 BL86 was discovered in 2004 by the Lincoln Near-Earth Asteroid Research or LINEAR, a collaboration between NASA, the United States Air Force and the Massachusetts Institute of Technology's Lincoln Laboratory.

Count down to 2004 BL86's closest approach to Earth

Where and how to see 2004 BL86?

2004 BL86's close encounter will provide a rare opportunity for amateur astronomers to view the asteroid, since according to NASA, 2004 BL86 will not come this close to the Earth for the next 200 years.

At its closest approach, 2004 BL86 won't be visible to the naked eye but observers with small telescopes and powerful binoculars will be able to view it.

Observers in North America, South America, Europe and Africa will have the best view of the asteroid flyby. Those in East Asia and Australia will have a chance to see the asteroid, but will require stronger equipment since the asteroid will be less bright while passing over these regions.

Will the weather in my city allow me to see the flyby?

To view the asteroid, astronomers suggest that viewers look towards the constellations of Hydra, Cancer and Leo.

Should I be worried?

Absolutely not! Scientists around the world have ruled out any possibility of the asteroid hitting the Earth – 2004 BL86 is expected to safely sweep by the Earth on January 26.

Topics: Astronomy, Asteroids

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