Bus-sized asteroid to whizz pass Earth this weekend

By News24 26 April 2019
Patrick Michel (L) from the French National Center for Scientific Research and Holger Sierks of the Max-Planck-Institute for Solar system research speak during a press conference regarding the Asteroid Impact Mission (AIM) in Berlin, Germany, 14 November 2016. The conference took place to to stress the importance for growing knowledge of Near Earth Objects (NEOs) and to raise awareness for the need to protect Earth from dangerous NEO impacts. EPA/JOERG CARSTENSEN

An asteroid the size of a bus will make a close fly-by of the Earth on Saturday.

The object, dubbed 2019 GF1, is between 8m and 18m long and will come as close as 1.8 million kilometres from the planet, data from NASA’s Jet Propulsion Laboratory (JPL) revealed.

For a typical object, it’s travelling relatively slowly at 1.91km/s – about five times the speed of sound – according to JPL.

“It’s moving across the sky very slowly because it’s orbiting the Sun at a similar rate to the Earth,” South African Astronomical Observatory (SAAO) Science Engagement Astronomer Dr Daniel Cunnama told News24.

Even at 18m long, 2019 GF1 is smaller than 2019 GC6 which came very close to Earth on April 9.

Asteroid 2019 GC6 was only discovered nine days before its fly-by, reports, and is a massive 30m wide.

It came as close as 219 000km. The Moon averages 380 000km from Earth.

Asteroids usually orbit a belt between Mars and Jupiter, as well as beyond Neptune in a region known as the Kuiper Belt.

They can be nudged out of orbit by an impact or the gravity of a large object.

These objects can then make their way into the inner solar system (between the Sun and Mars) where they are known and near-Earth objects (NEOs).

Cunnama remarked that 2019 GF1’s orbit was close to that of Earth.

“It looks like it’s on a very big orbit. It’s slightly off the Earth’s orbit.”

2019 GF1 could be classified as an Apollo asteroid because it crosses the Earth’s orbit, according to JPL data.

Other classifications include Amors (which orbit outside the Earth’s orbit), and Inner Earth Objects (which orbit between the Earth and the Sun).

According to, there are about 1 967 potentially hazardous NEOs and scientists continue to discover new ones.

The SAAO hosts an Asteroid Terrestrial-Impact Last Alert System (Atlas) instrument in Sutherland to monitor for hazardous asteroids.The instrument is funded by NASA and costs $3.8m.



In other news...

July 18 marks Nelson Mandela day. All over the country, South African citizens devote 67 minutes to charitable causes in memory of Madiba. It's a great initiative and one of those few occasions in South Africa where we come together as a nation in pursuit of a common cause. An annual 67 minutes isn't going to cut it though.

In the words of Madiba: "A critical, independent and investigative free press is the lifeblood of any democracy."

Every day Daily Maverick investigates and exposes the deep rot of state capture and corruption but we need your help. Without our readers' support we simply won't survive. We created Maverick Insider as a membership platform where our readers can become part of our community while ensuring that we can keep doing the investigations that we do and, crucially, that our articles remain free to everyone that reads them. Sign up to Maverick Insider this Mandela Month and make that meaningful contribution last longer than 67 minutes.For whatever amount you choose, you can support Daily Maverick and it only takes a minute.

Support Daily MaverickPayment options

Comments - share your knowledge and experience

Please note you must be a Maverick Insider to comment. Sign up here or if you are already an Insider.


Malema buddy’s mine leaves community reeling

By Micah Reddy for amaBhungane

"Sometimes the best way to help someone is just to be near them." ~ Veronica Roth