Fireball, 7 November 2009
On 7 November 2009 at 11:31 UTC, sensors detected a fireball above 45.5°N, 157.7°W. It released energy equal to about 0.079 kilotons of TNT.
The numbers
- Date and time (UTC)
- 7 November 2009, 11:31
- Location
- 45.5°N, 157.7°W
- Height at peak brightness
- Not released
- Speed
- Not released
- Light energy radiated
- 2.2 × 10¹⁰ joules
- Estimated total energy
- 0.079 kilotons of TNT
What does that mean?
That is a small burst by fireball standards: the Chelyabinsk fireball of 2013 released about 440 kilotons. If the object was stony rock entering at a typical 20 km/s, it was roughly 1 metres across and weighed around 1.7 tonnes.
Most objects of this kind break up and burn away high in the atmosphere, but larger ones can drop small meteorites. About 70% of Earth is ocean, so most fireballs like this fall into the sea.
Saw a bright fireball yourself? Report what you saw.