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One of these days, the avid gazelle might see a space rock 100 meters wide from the earth, but fortunately, scientists don’t want it to collide with our planet.
The asteroid 2014 QJ33, which NASA is currently watching closely, is expected to enter Earth’s orbit on September 17, and orbit at a speed of 19,371 miles per hour. What is striking is its size-possibly larger than London Bridge, and fortunately, it will fly a safe distance of at least 1
More specifically, the space agency predicts that the width of the celestial body is between 48m and 100m, while the highest landmark on the Thames in London spans about 104 meters.
The huge space rock-Apollo asteroid-belongs to the category of Near-Earth Objects (NEO). According to NASA classification, it refers to any comet or asteroid that flies on our planet with 1.3 astronomical units (AU)-one AU is The average distance between the earth and the sun.
NEO is also a term used to describe “comets and asteroids are attracted to enter the orbit near the earth due to the gravitational force of nearby planets.”
Another synonymous but more commonly used narrow term is “potentially dangerous asteroid” or PHA.
According to NASA data, PHA is currently determined based on the asteroid’s measured potential for dangerous close passes. In particular, all asteroids with a minimum orbital crossing distance (MOID) of 0.05 AU or less and an absolute size (H) of 22.0 or less are defined as PHA.
NEOWISE data shows that there are 4700±1500 potentially dangerous asteroids with a diameter greater than 100 meters.
Although historically speaking, this incident has aroused many biblical speculations in the world, since the dinosaur space rocks were wiped out 66 million years ago, the earth has not seen asteroids of revelatory scale.
Most tracking asteroids do not directly contact the Earth’s atmosphere, but in rare cases, huge space bodies can affect the operation of the weather system.