Thought I would share this here, it should be quite the spectical, it isn't supposed to enter Earth's atmospere, but, even it is does, it was estimated to deisintergrate before any impact scenario.
Very cool times in our skies, would really like to watch and see if this does get entangled with Earths atmosphere and gravitational pull.
QuoteNewly-discovered asteroid 2012 KT42 is flying past Earth today (May 29th) only ~14,000 km above the planet's surface. This means 2012 KT42 will actually fly inside the Clark Belt of geosynchronous satellites. The 3- to 10-meter wide asteroid ranks # 6 on the top 20 list of closest-approachers to Earth.
http://spaceweather.com/ (http://spaceweather.com/)
1Wordlwatcher