Date: 3/2/2009

Australian astronomers at the Siding Sprint Observatory discovered the 35-meter wide asteroid three days before its closest approach, which at the time was being compared to the theoretical object responsible for the Tunguska explosion that occurred in 1908. It had been projected to be twice as large as some telecommunications satellites and soaring about a fifth of the distance to the Moon. DD45 zipped by us at 74,800 km, impact-free.