For the second time this week a small asteroid is set to pass relatively close to the earth.

According to NASA, at around 5:30 this evening asteroid 2018 CB will pass by the earth at a distance of about 39,000 miles, which is less than one-fifth the distance of earth to the moon. The asteroid is estimated to be between 50 and 130 feet in size.

It's said, that earth isn't supposed to be at significant risk of getting hit by any known asteroids for at least 100 years. That alone is a weird statement since the asteroid that is passing by earth today was only just discovered this past Sunday (Feb 4th).

It's really only a couple times a year that an asteroid of this size passes by the earth. Although small asteroids do pass between the earth and the moon several times a month, just not this large.

This past Tuesday asteroid 2018 CC passed by the earth at 3:10 pm. That asteroid was a bit further away (114,000 miles)  and a bit smaller too, between 50 and 100 feet in size.

Source: NASA