The 2006 QQ23 was earlier claimed to hit our planet earth at a break-neck speed that triggered fear amongst the people. The rumour was then debunked and was later suggested to not pose any threat to us.
Although the space rock is classified as ''potentially hazardous'', it is not going to collide with the earth and will only flyby at 7:30 UT on Saturday, August 10, 2019. So you should not worry at all; asteroids have come much closer to Earth before and missed.
“If a rocky meteoroid larger than 25 meters but smaller than one kilometre were to hit Earth, it would likely cause local damage to the impact area. We believe anything larger than one to two kilometres could have worldwide effects,” said NASA, according to a report.
"We have to make sure that people understand that this is not about Hollywood, it's not about the movies. This is about ultimately protecting the only planet we know, right now, to host life - and that is the planet Earth,” said US space agency's chief Jim Bridenstine