The 2006 QV89 asteroid now has a zero% likelihood of hitting the Earth in September
Why discuss an asteroid that has no likelihood of touching the Earth? As a result of this asteroid, referred to as 2006 QV89, has a narrative. A narrative to be fairly tough to comply with.
As its title suggests, this asteroid was found in 2006. It's a near-Earth asteroid (NEA, or NEO, for Close to-Earth Object). An object is classed as NEO when its perihelion, or its nearest strategy to the Solar, is inside a radius of 1.three astronomical models. And if its orbit crosses Earth's orbit and its object exceeds 140 meters (460 ft), it’s referred to as a probably harmful object (PHO.).
The 2006 QV89 has a diameter of about 30 meters (100 ft), so it's too small to trigger sufficient injury to change into a PHO. However we didn’t at all times know that QV89 was not harmful.
QV89 was onerous to comply with at first, as have been many asteroids. One seems within the sky, scientists have a short while to restrict its dimension and orbit, then in a couple of days, it could disappear. And this might not be seen for many years. On the premise of this transient window of statement, astronomers should resolve whether or not or not it’s a threat and whether or not it ought to be on the danger listing. (All that the danger listing means is that the objects it accommodates have a non-zero likelihood of hitting them – not very helpful, actually.)
2006 on the orbit of QV 89. Picture credit score: ESA
When QV89 was detected for the primary time, it was solely seen for 10 days. It's not numerous time to find out if it's a risk. Within the case of this asteroid, nobody was sure. The perfect guess was that he had a 7,000 likelihood of reaching Earth in September 2019. So he was positioned on the danger listing.
The astronomers wished to comply with this asteroid, however they didn’t know the place to look. If it appears insurmountable, it’s not. What scientists know is the place QV89 ought to be within the sky, if it have been to hit Earth. It implies that even with out seeing this factor, we will exclude an impression.
A Perseid meteor of 2010 on the very giant telescope (VLT) of the European European Observatory. Credit score: ESO
On July four and 5, ESO and ESA astronomers used the very giant telescope (VLT) to probe the evening sky. As a substitute of wanting in useless for the small rock, they pointed the large telescope to the place the asteroid ought to be, because it was heading in the direction of us. The hassle is a part of the continuing collaboration between ESA and ESO to look at high-risk asteroids. The VLT, with its eight.2 meter head mirror, has the facility to see asteroids transfer in area, if the place to steer it.
They didn’t see something. They took a really deep image of the place QV89 ought to be in 2006 if it have been to hit our planet in September, and it was not there.
Nope. No asteroid. If 2006 QV89 have been to the touch the Earth, it ought to be on this image. The three crimson crosses point out the place it ought to be if it have been to strike us. Picture credit score: ESO / O. Hainaut / ESA
The picture above is a picture of the world of the sky the place the 2006 QV89 asteroid could be situated, provided that it was on a collision course with the Earth in 2019. This picture was taken with the very giant telescope ( VLT) of the European European Observatory. The phase indicated by the three crimson crosses on this picture reveals the placement of the asteroid if it was on a collision course. It has been handled to get rid of star contamination within the background. Due to this fact, if this picture have been current, the 2006 QV89 asteroid would seem as a spherical and vibrant mild supply inside the phase.
Though the asteroid was smaller than astronomers suppose, possibly just a few toes broad, it might seem. Smaller than that and the VLT wouldn’t have seen it. However that was the case, so 2006 QV89 would even be innocent. The whole lot that may be so small would burn within the ambiance of the Earth.
We’re protected. For the second. There may be formally no likelihood that the planet will hit Earth, and ESA has eliminated 2006 QV89 from its threat listing. We may by no means hear about it once more.