2008 TC3 [an asteroid in space] was discovered on 6 October by astronomers using the Mt. Lemmon telescope in Arizona.... At 01:45 UTC, JPL scientist Paul Chodas announced, "We estimate that this [asteroid] will enter the Earth's atmosphere at around 2:45:28 UTC [October 7] and reach maximum deceleration around 2:45:54 UTC at an altitude of about 14 km. These times are uncertain by +/-15 seconds or so."Question: The actual time of entry in the earth's atmosphere?
Answer: The flash accompanying the asteroid's entry into the atmosphere was photographed by satellite at 02:45:47 UTC [October 7]. This was very probably close to the time of maximum deceleration. That's a difference of seven (7) seconds, which is within the +/-15 seconds uncertainty given by JPL scientist Chodas.
Not bad, eh?