It is most likely to miss, but it will definitely pass between Earth and the Moon. The high inclination of the orbit makes it less likely to be greatly purturbed by Mars or Venus. Nevertheless it could be purturbed significantly over 878 years, enough to displace it 300,000 kilometers closer to Earth. The closer it gets to Earth the stronger the effect of gravity; if it gets close enough, it may not matter what the projected miss distance is, it may simply be pulled in. The fact that it approaches Earth from behind makes this more likely since the duration of the close-encounter is drawn-out over a longer timespan, giving gravity more time to do its work.

For randomly selected meteorites, there is a 75% probability of an ocean-strike. However the high-inclination of 1950DA's orbit makes it appear that the hit would definitely occur in the northern hemisphere, making a land-hit more likely. Most of the population of the planet is in the northern hemisphere as well. A land-hit is usually considered less destructive, however a large dust cloud is expected, versus tsunami, which could adversely affect world food supplies.

Asteroid 1950DA is not a meteorite. It is a spherical rock 1.1 kilometers in diameter. This thing has serious potential. Tunguska was small in comparison. In fact at this size there is potential for global effects, although not global catastrophe. It is at worst a "continent killer".

Click: Breaking News on Asteroid 1950DA.

Deflection? Solar sails won't do. We haven't demonstrated a single solar sail successfully in all the history of the space program. I prefer an impact-deflector: a simple exchange of momentum between a projectile and the asteroid. Using a nuclear device would create a lot of debris, which is just as dangerous. So I think a series of impactors would be preferable.