Earth will be visited by an asteroid that is confirmed to pass by without any impact, on March 5, 2016.
This asteroid is a return guest. In 2013 it flew by at a distance of 1.3 million miles, according to mnn.com. The asteroid could get much closer to earth possibly at 11,000 miles and maybe even as far nine million miles NASA said, reported cbsnews.com.
“NASA’s Center for NEO Studies (CNEOS) at the Jet Propulsion Laboratory declared that there is no possibility of the object impacting Earth,” according to cbsnews.com. The asteroid, named “2013 TX68,” would only impact Earth on September 28, 2017, but there is one in 250 million chance, reported nasa.gov.
When the 2013 TX68 flew by Earth in 2013, it exploded over Chelyabinsk, Russia. The size of the asteroid in 2013 was approximately 65 feet wide, and the upcoming asteroid is approximately 100 feet in diameter, according to nasa.gov.
Asteroid 2013 TX68 was discovered on October 6, 2013 by the NASA-funded Catalina Sky Server. It was discovered during the nighttime sky, and after three days of tracking 2013 TX68, it disappeared into daytime sky and it could no longer be seen. Since scientists couldn’t track the asteroid for very long, they could not predict its orbit, but they know for sure it won’t hit Earth, according to nasa.gov.
Asteroids are a general mixture of oxygen and silicon, the two most abundant elements in Earth’s crust. Metallic asteroids are composed of other elements such as iron, nickel, gold, magnesium, platinum, iridium, and palladium. Metallic asteroids may contain precious metals such as osmium, ruthenium and rhodium, according universetoday.com.
The largest asteroid to ever hit Earth was the Vredefort Crater. The Vredefort Crater was estimated to have a radius of 118 miles, and it hit Earth about two billion years ago. The asteroid impacted Earth in Free State, South Africa, and the crater was declared a UNESCO World Heritage Site in 2005, reported news.nationalgeographic.com.