Asteroid 2016 RB1 was discovered on Sept. 5, 2016, by astronomers using the 60-inch Cassegrain reflector telescope of the Catalina Sky Survey, located at the summit of Mount Lemmon in the Catalina Mountains north of Tucson, Arizona -- a project of NASA'S NEO Observations Program in collaboration with the University of Arizona.
If this was a porous rock asteroid with 16 meters diameter traveling at 17 kilometers per second then it would have been an airburst [Imperial college of london impact calculator] This calculator is based on a 30 page paper Earth Impact Effects Program: A Web-based computer program for calculating the regional environmental consequences of a meteoroid impact on Earth
Distance from Impact: 500.00 meters ( = 1640.00 feet )
Projectile diameter: 16.00 meters ( = 52.50 feet )
Projectile Density: 1500 kg/m3
Impact Velocity: 17.00 km per second ( = 10.60 miles per second )
Impact Angle: 45 degrees
Target Density: 2000 kg/m3
Target Type: Crystalline Rock
The projectile begins to breakup at an altitude of 72500 meters = 238000 ft
The projectile bursts into a cloud of fragments at an altitude of 30900 meters = 101000 ft
The residual velocity of the projectile fragments after the burst is 11.9 km/s = 7.42 miles/s
The energy of the airburst is 2.35 x 10^14 Joules = 56 kilotons
No crater is formed, although large fragments may strike the surface.
If it was made of iron (8 times denser than water) and 16 meters in diameter then
The projectile begins to breakup at an altitude of 14000 meters = 46000 ft
The projectile bursts into a cloud of fragments at an altitude of 5120 meters = 16800 ft
The residual velocity of the projectile fragments after the burst is 6.76 km/s = 4.2 miles/s
The energy of the airburst is 2.09 x 10^15 Joules =500 kilotons.
Large fragments strike the surface and may create a crater strewn field. A more careful treatment of atmospheric entry is required to accurately estimate the size-frequency distribution of meteoroid fragments and predict the number and size of craters formed.