Close Encounter with a Big Asteroid on May 31
May 22, 2013 | NASA
Earth's May 31 "close call" with a 1.7 mile-wide asteroid has radio astronomers excited. Fortunately it is going to miss Earth by over 3 million miles.
"Whenever an asteroid approaches this closely, it provides an important scientific opportunity to study it in detail to understand its size, shape, rotation, surface features, and what they can tell us about its origin. We will also use new radar measurements of the asteroid's distance and velocity to improve our calculation of its orbit and compute its motion farther into the future than we could otherwise."
Earth Flyby Reality Check
February 15, 2013 | NASA
NASA has a collection of videos, simulations, graphics and frequently asked questions about the Asteroid 2012 DA14 Earth close approach on their website.
Images and Data from an Asteroid Visit
September 29, 2013 | NASA
In 2011 and 2012, NASA's Dawn spacecraft orbited the giant asteroid Vesta. This was an opportunity for researchers to get close-up observations to compare with the information they obtained from ground and satellite observations. They now have an article titled: "Dawn Reality-Checks Telescope Studies of Asteroids".