back in 1994, and the reason we re able to know that it hasn t been this close since 1933 is because of the data that we ve been able to pick up on this, on this asteroid. it s well established, this orbit. so we know the exact track it s going to go on, and we know that it won t be this close for another 200 years. look at how big this thing is. 5400 feet, that is nearly four times the size of the empire state building. wow. tyler, thanks for that. all right. let s bring in keith cowling, editor of space raft.com, nasa space biologist. keith, good morning. good morning. this is kind of amazing that we haven t seen anything this close since the 1930s. and we re not going to see it again for 200 years? well, we haven t seen this asteroid this close since the 1930s, but things like this zoom by all the time. gosh, so close. but not too close for comfort in your view? yeah, this is a don t look