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Asteroid-Bennu-933271

Asteroid Bennu ‘Dynamically Unstable’ and Could Be Heading Directly For Earth

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Not one to stir up fear but I wonder if this has got all the scientists and astronomers in a mild panic. In another article we shared we see Russian scientist working on (testing) lasers to blow up asteroids and another one prior to that a NASA program to deflect or destroy incoming asteroid threats ‘NASA Preparing Spacecraft to ‘Nuke’ Dangerous Asteroids‘. I wonder if perhaps they are truly worried about this one hitting Earth, let’s be real…it’s not as if they are going to tell us (the people) that they are worried. Though it might be many years from now, they will surely need all the available time to perfect a method of averting an asteroid disaster.

But this is not just some scare tactic to get shares or views folks, asteroid Bennu (as you will read in the article) presently has a 1-in-2,700 chance of slamming into Earth on Sunday September 2135!

via Express UK:

The enormous asteroid, which has been called one of the most potentially hazardous asteroids by scientists, is estimated to be the size of the Empire State Building.

The huge space rock has the potential to unleash 1,200 megatons of energy upon collision – 80,000 times that of the Hiroshima bomb.

Members of a US ‘national planetary defence team’ have published a study warning of the possible “dire” consequences of the asteroid colliding with Earth.

Scientists working at the Lawrence Livermore National Laboratory have been collaborating with NASA on a spacecraft named HAMMER (hypervelocity Asteroid Mitigation Mission for Emergency Response vehicle).

The craft, which weighs a 8.8 tonnes and is 9 meters tall, is usually able to deflect asteroids from earth, destroying them with nuclear blasts.

But scientists have deemed HAMMER “inadequate” in the case of asteroid Bennu, as it would be unable to move the huge asteroid off its current path.

The rock is 1,664 times heavier than the Titanic at 79 billion kilograms and is 500 metres in length – the width of five football fields.

Academics said: “Using a single HAMMER spacecraft as a battering ram would prove inadequate for deflecting an object like Bennu.”

But another solution is sending several rockets carrying HAMMER spacecrafts, however the mission’s success rate would lower significantly “due to the failure rate associated with each individual launch”.

If the asteroid is blasted with nuclear bombs, the Earth could be showered with radioactive rock fragments.

Bennu has a 1 in 2,700 chance of hitting Earth on September 25, 2135, according to researchers.

Kirsten Howley, a physicist at Lawrence Livermore National Laboratory and co-author of the study, said: “The chance of an impact appears slim now, but the consequences would be dire.

“This study aims to help us shorten the response timeline when we do see a clear and present danger so we can have more options to deflect it. The ultimate goal is to be ready to protect life on Earth.”

It could take a minimum of 7.4 years to reach Bennu if it was decided to send a craft, and “many years for the small change in speed to accumulate into a sufficient change in trajectory,” according to the study.

But experts predict that if an asteroid the size of Bennu hit, it would fall short of wiping out humanity.

An asteroid would need to be at least 1 kilometre wide to cause mass extinction, according to scientists.

Ms Howley added: “The probability of a Bennu impact may be 1 in 2,700 today, but that will almost certainly change – for better or worse – as we gather more data about its orbit.

“Delay is the greatest enemy of any asteroid deflection mission. That’s why there’s urgency in getting viable deflection platforms on the shelf today.”

ISABEL VAN BRUGEN
Express UK


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