This huge 4921-foot HIDDEN asteroid can HIT Earth, study warns of danger to humanity | Tech News

This huge 4921-foot HIDDEN asteroid can HIT Earth, study warns of danger to humanity

Scientists have discovered the largest potentially hazardous asteroid in the last eight years which went undetected by hiding behind the Sun. It can strike the Earth one day.

By: HT TECH
| Updated on: Nov 01 2022, 12:17 IST
Asteroid fun facts in pics: NASA reveals all you need to know
Asteroids
1/5 Space is full of objects, out of which only a few have been discovered. Asteroids are some of these objects. If you are not aware about the dangerous objects called asteroids, here are some facts you should know. First, did you know that asteroids are sometimes called minor planets? Well, they are. (Pixabay)
Asteroids
2/5 Differences between an Asteroid, Comet, Meteoroid, Meteor and Meteorite: According to the information provided by NASA, Asteroid is a relatively small, inactive, rocky body orbiting the Sun. Comet is a relatively small, at times active, object whose ice can vaporize in sunlight forming an atmosphere (coma) of dust and gas and, sometimes, a tail of dust and/or gas. Meteoroid is a small particle from a comet or asteroid orbiting the Sun. Meteor is the light phenomena which results when a meteoroid enters the Earth's atmosphere and vaporizes, in short, a shooting star. While, Meteorite is a meteoroid that survives its passage through the Earth's atmosphere and lands upon the Earth's surface. (NASA)
Asteroids
3/5 Asteroid: Size, frequency and impact- More than 100 tons of dust and sand sized particles are bombarded towards Earth everyday, according to NASA. While, about once a year, an automobile-sized asteroid hits Earth's atmosphere, creates an impressive fireball, and burns up before reaching the surface. Every 2,000 years or so, a meteoroid the size of a football field hits Earth and causes significant damage to the area. Only once every few million years, an object large enough to threaten Earth's civilization comes along. Impact craters on Earth, the moon and other planetary bodies are evidence of these occurrences. Space rocks smaller than about 25 meters (about 82 feet) will most likely burn up as they enter the Earth's atmosphere and cause little or no damage. By comparison, asteroids that populate the main asteroid belt between Mars and Jupiter, and pose no threat to Earth, can be as big as 940 kilometers (about 583 miles) across. (NASA)
Asteroids
4/5 How is an Asteroid Orbit Calculated? An asteroid's orbit is computed by finding the elliptical path about the sun that best fits the available observations of the object. That is, the object's computed path about the sun is adjusted until the predictions of where the asteroid should have appeared in the sky at several observed times match the positions where the object was actually observed to be at those same times. (Pixabay)
Asteroids
5/5 What is NASA doing to find and learn more about potentially hazardous asteroids and comets? NASA has established a Planetary Defense Coordination Office (PDCO), managed in the Planetary Science Division at NASA Headquarters in Washington, D.C. The PDCO ensures the early detection of potentially hazardous objects (PHOs) - asteroids and comets whose orbits are predicted to bring them within 0.05 Astronomical Units of Earth (5 million miles or 8 million kilometers) and of a size large enough to reach Earth's surface - that is, greater than approximately 30 to 50 meters. NASA tracks and characterizes these objects and issues warnings about potential impacts, providing timely and accurate information. NASA also leads the coordination of U.S. Government planning for response to an actual impact threat. (AFP)
Asteroids
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Know the dangers of this largest potentially hazardous asteroid. Will it strike the Earth? (Pixabay)

The various telescopes on Earth and on satellites orbiting the Earth have discovered more than 20,000 near-Earth objects (NEOs), which could someday in future hit our planet. But when it comes to discovering asteroids roaming completely within Earth's orbit, our record is very poor. So far, we have only discovered 25 such asteroids. The reason behind it is that the glare of the Sun stops modern telescopes from fully gazing around the sky to find out asteroids that can be lethal to our planet. A study has recently discovered one such space rock and by its claims, it is the largest potentially hazardous asteroid to be discovered in the last eight years with a width of 1.5 kilometers (4921-foot asteroid, approximately). And what's concerning is that it can strike the Earth one day.

Largest potentially hazardous asteroid discovered

The study has been published in The Astronomical Journal and has used the Dark Energy Camera (DECam) mounted on the Víctor M. Blanco 4-meter Telescope at Cerro Tololo Inter-American Observatory in Chile to find this scary space rock. The asteroid has been named 2022 AP7. The concern with this particular asteroid is that compared to other such celestial bodies, its orbit is entirely within Earth's orbiting space, and due to how it is placed, it can someday cross paths with our planet. And the bigger fear is that there can be more of the same.

“Our twilight survey is scouring the area within the orbits of Earth and Venus for asteroids. So far we have found two large near-Earth asteroids that are about 1 kilometer across, a size that we call planet killers,” said Scott S. Sheppard, an astronomer and the lead author of the study in a statement. “There are likely only a few NEAs with similar sizes left to find, and these large undiscovered asteroids likely have orbits that keep them interior to the orbits of Earth and Venus most of the time”, he added.

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The main reason why discovery of such asteroids have been so slow is because of the intense glare of the Sun. As telescopes contain highly light-sensitive instruments to view objects far away in space, a bright light from the Sun can either overexpose any image taken or damage the instrument itself. This is why most telescopes only operate on the night sky-field of the Earth.

“Only about 25 asteroids with orbits completely within Earth's orbit have been discovered to date because of the difficulty of observing near the glare of the Sun,” revealed Sheppard.

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First Published Date: 01 Nov, 11:15 IST
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