Asteroid (29075) 1950 DA was discovered on 23 February 1950. It was observed for 17 days and then faded from view for half a century. Scientists estimate there is a 0.3 per cent chance it will hit Earth on March 16 2880
Scientists at Nasa have been watching an asteroid, named 1950 DA, which is currently on a path to collide with Earth on March 16, 2880.
Scroll down for animation.
The asteroid is a rock two-thirds of a mile in diameter, travelling at about 15km (nine miles) a second relative to the Earth.
It is due to swing so close to Earth it could slam into the Atlantic Ocean at 38,000 miles per hour.
It is estimated that if 1950 DA were to collide with the planet, it would do so with an force of around 44,800 megatonnes of TNT.
Although the probability of an impact is only 0.3 per cent, this represents a risk 50 per cent greater than an impact from all other asteroids.
ANIMATION: Asteroid 1950 DA's potential trajectory
A simulation of an asteroid impact tsunami developed by scientists at the University of California, Santa Cruz, shows waves as high as 400 feet sweeping onto the Atlantic Coast
ASTEROID 1950 DA
The asteroid, named 1950 DA, is a rock two-thirds of a mile in diameter, travelling at about 15 km (nine miles) per second relative to the Earth.
It is due to swing so close to Earth it could slam into the Atlantic Ocean at 38,000 miles per hour.
It is estimated that if 1950 DA were to collide with the planet, it would do so with an force of around 44,800 megatonnes of TNT.
Although the probability of an impact is only 0.3 per cent, this represents a risk 50 per cent greater than an impact from all other asteroids.
Over the long timescales of Earth's history, asteroids this size and larger have periodically hammered the planet.
The so-called K/T impact, for instance, ended the age of the dinosaurs 65 million years ago.
Asteroid 1950 DA was discovered on 23 February 1950. It was observed for 17 days and then faded from view for half a century.
Then, an object discovered on 31 December 2000 was recognised as being the long-lost 1950 DA.
The New Year's Eve sighting was exactly 200 years to the night after the discovery of the first asteroid, Ceres.
It was found that the asteroid 1950 DA has a trajectory that for a 20-minute window on March 16, 2880, a collision cannot be entirely ruled out.
Optical observations showed the asteroid rotated once every 2.1 hours, the second fastest spin rate ever observed for an asteroid its size.
But scientists claim there is no cause for concern.
If it is eventually decided 1950 DA needs to be diverted, the hundreds of years of warning could allow a method as simple as dusting the surface of the asteroid with chalk or charcoal, or perhaps white glass beads.
This would change the asteroid's reflectivity and allow sunlight to do the work of pushing the asteroid out of the way.
Planetary scientists, meanwhile, are getting a better handle on the risks of asteroid impacts.
Enlarge 
This graphic shows the orbits of all the known Potentially Hazardous Asteroids (PHAs), numbering over 1,400 as of early 2013. These are the asteroids considered hazardous because they are fairly large (at least 460 feet or 140 meters in size), and because they follow orbits that pass close to the Earth's orbit
There are currently 1,400 potentially hazardous asteroids that could pass close to Earth.
These asteroids are considered hazardous because they are fairly large - at least 460 feet or 140 meters in size - and will pass within 7.5million kilometres.
Nasa is currently tracking all 1,400 potentially hazardous asteroids so far identified and predicting their future close approaches and impact probabilities.
As part of this effort it is working on the development of an infrared sensor that could improve its asteroid tracking capabilities, dubbed the Near Earth Object Camera (NEOCam) sensor.
Once launched, the space-based telescope would be positioned at a location about four times the distance between Earth and the moon.
From this lofty perch, NEOCam could observe the comings and goings of near Earth objects, including PHAs, without the impediments such as cloud cover and daylight.
The Near-Earth Object Camera (NEOCam) is a mission proposed to NASA to find potentially hazardous asteroids. The mission will use a new sensor, called the NEOCam chip, that has more pixels and better sensitivity than previous generations of infrared sensors
Culled from Daily Mail
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