Space rock measures approximately 600 feet
#Asteroid #Space #nearearthobject
The fire ball that passed over Japan in 2017 is linked to a mile-long asteroid. Scientists now believe that the asteroid, known as 2003 YT1 could break up and harm life on Earth.
Comparatively, the average distance between the Earth and the moon is about 239,000 miles.
JPL reports that two other much smaller asteroids – approximately the size of a bus and an airplane – will also approach Earth on Tuesday, coming within 700,000 miles.
On Wednesday, two additional house-sized asteroids are also anticipated to come within four million miles of the Earth – none of which pose a threat.
This is not the first time this year an asteroid has had a “close call.”
An asteroid is a rocky fragment of space matter that is a remnant of the formation of the solar system 4.6 billion years ago.
What asteroid is “potentially hazardous” is determined by its size, shape, mass, composition and position.
According to JPL, it’s classified as about 500 feet or larger and within less than half the distance from the Earth to the sun: around 93 million miles.
In addition, a near-Earth object (NEO) is an asteroid or comet that approaches Earth less than 1.3 times the distance from the Earth to the sun.
While small asteroids are frequent visitors and 80 to 100 tons of material falls upon Earth from space in the form of dust and small meteorites every day, the Center for Near Earth Object Studies (CNEOS) assures that “no one should be overly concerned about an Earth impact of an asteroid or comet.”
Scientists and engineers are currently studying potential asteroid impacts – both finding and tracking asteroids and using simulations, in order to prevent threatening situations.