Asteroid to come near to Earth: Where, when and how to watch it free of cost? NASA unravels mysteries

According to NASA's Jet Propulsion Laboratory, asteroid 2011 UL21 may come to the Earth at the speed of around 58,000 miles per hour. It may come within 4.1 million miles of Earth. We can say that the asteroid may be approximately 17 times farther away from Earth than the moon.