Recent Calculations Suggest 'Apophis' asteroid 2068 Collision Theory Alive

Asteroid 'Apophis' has started worrying scientists again, after new analysis show its deflecting orbit.  Astronomers say, 'Yarkovsky acceleration', a path changing effect, unconsidered earlier, is heating the asteroid unevenly by the Sun, creating a drift of 170 metres each year. With 1 in 150,000 impact probability, new considerations have increased collision threat by 'Apophis' in 2068. Astronomer David Tholen said the ‘2068 impact scenario’ is in action  and must be carefully tracked.