Heads up space nuts....or maybe it should be heads down!

There's a new 12 meter rock zippin' through our neighborhood today. With only 86 observations since it's discovery, 2016RB1 is expected to whiz by Earth at a mere 0.1 LD sometime today. That doesn't leave much room for any error in distance calculations otherwise this one might leave a mark if it lands.

Exactly why I'm voting for "Sweet Meteor Of Death"!

SMOD lol by GhostCreekMine, on Flickr

Looks like it passed by shortly after you posted this; close approach time was listed at 1728 zulu (1138 MT) +/- < 1 min (my forum clock in the lower right says you've got the site on central time, so 12:21 is about 17 minutes prior to the passing).

Don't worry...you have plenty of time to construct your foil hat for next year. 2012 TC4 flies by at a predicted nominal pass distance of 0.04 LD (almost an order of magnitude closer) sometime between 0329 and 0903 on 12 Oct 2017 (2129-0303 MT, 11-12 Oct 2017). It's #2 on the list of JPL potentially hazardous asteroids. It's about the same size as 2016 RB1, but it's relative velocity is a bit higher. Other than that, many of us likely won't be around in 2095 for the passing of 2010 RF12 that has a ~6% chance of hitting us according to current ephemeris.

If you want to geek out more, check out their list, and play with the filters: Near Earth Object Program

Spaceweather also posts them up at the bottom of each day's feed.