It was in February 2012 about a year before its close approach to Earth in February 2013.
The asteroid is known as 2012 DA14. It is about 150 feet across.
The name was 2012-DA14.
It came and went on February 15th, it was called 2012-DA14.
The asteroid does not have a name, but has the designation 2012 DA14
It does not have an actual name, but it has the designation 2012 DA14
One already has. 2012 DA14 passed about 17,000 miles from earth on February 13, 2013.
No. The asteroid has passed, having missed Earth by about 17,000 miles. That's fairly close, but scientists new it would miss by about that much.
There are no asteroids being tracked, studied, or observed for which any point in their orbit coincides with any point in Earth's orbit at any time in 2012.
This asteroid does exist, found in less than two weeks before the Spanish La Sagra Observatory astronomer, 2012 DA14 just temporary number. Has been found to connect 10 days of observation, astronomers generally determined its orbit, similar to the Earth's orbit, but the inclination is large. Therefore, most of the time, the asteroid away from Earth came away. But it does have two opportunities each year the asteroid can run very close to the distance of the Earth. Just said, year 2 chances will run to the near Earth asteroid. Last February 16 this year, when it was closest to the earth about 250 million kilometers, equivalent to the Earth-Moon distance of 6 times, partial, or very far. However, next year's February 15, 2012 DA14l indeed close to the Earth. It grazed from about 21,000 kilometers from the Earth's surface, the height of the geostationary orbit communications satellites used to broadcast television signals are low than us! Though this is really close to the Earth rub in the past, but still just "rub." In the past it does not hit the Earth. 21000 meters in astronomy scale is really close to the standards of everyday life, this distance is far enough. It is unlikely to hit the Earth in February 2012 DA14 next year.
1991 BA is the closest and smallest asteroid yet observed outside the Earth's atmosphere. Reference.
There are no asteroids being tracked, observed, or studied that are in orbits in which their positions will coincide with the Earth's position at any time in 2012. (As I write this, roughly 2/3 of 2012 have passed relatively uneventfully, at least by comparison with global devastation.)
1. The Sun 2. The Moon 3. 2012-DA14 4. The Empire State Building