(meteorobs) Major fireball event over SouthEast last evening...

[Pat]

There are very good sonics on this event also with at least 8 stations catching it. I get a sonic boom just SW of the town of Benton. Unfortunately my first calcs put that boom at about 40km which disagrees with the video altitude. Obviously there has to be a solution there within the error bounds of all data which works.
Another unfortunate event is it seems the Doppler Radar server must have crashed between 7am and 8am UTC...all stations have a gap in data at that time!

--- In meteorobs at yahoogroups.com, Bill Cooke <cookewj at ...> wrote:
>
> Last night at approximately 2:27 AM CDT (2013 August 28 07:27:22 UTC), all 6 NASA allsky cameras in the SouthEast picked up a very bright fireball (peak magnitude ~ -11, 2 magnitudes brighter than the Last Quarter Moon) that MAY have produced meteorites. The cameras were completely saturated, necessitating a manual solution. This may very well be the brightest event our network has observed in 5 years of operation.
> 
> Using two stations, we have derived the following crude parameters:
> 
> Start location: 84.943 W, 34.969 N at an altitude of 97.4 km
> Last location: 84.578 W, 35.206 N at an altitude of 37.9 km (this is NOT the lowest point; other stations show it continuing)
> Speed: 23.7 km/s
> Peak brightness: -10.9
> Mass: ~45 kg (roughly 0.3 to 0.4 meters in diameter)
> Radiant: RA - 336 +/- 2 deg, Dec +9.8 +/- 4 deg
> 
> We will work to refine the solution tomorrow. 
> 
> Composites from cameras stations:
> http://fireballs.ndc.nasa.gov/special/20130828_072722/ev_20130828_072723A_02A.png
> http://fireballs.ndc.nasa.gov/special/20130828_072722/ev_20130828_072722B_03A.png
> http://fireballs.ndc.nasa.gov/special/20130828_072722/ev_20130828_072722B_04A.png
> http://fireballs.ndc.nasa.gov/special/20130828_072722/ev_20130828_072724A_07A.png
> 
> Videos (Windows Media Format):
> http://fireballs.ndc.nasa.gov/special/20130828_072722/ev_20130828_072724B_02A.wmv
> http://fireballs.ndc.nasa.gov/special/20130828_072722/ev_20130828_072722B_03A.wmv
> http://fireballs.ndc.nasa.gov/special/20130828_072722/ev_20130828_072722B_04A.wmv
> http://fireballs.ndc.nasa.gov/special/20130828_072722/ev_20130828_072724A_07A.wmv
> 
> Light curve from Huntsville camera:
> http://fireballs.ndc.nasa.gov/special/20130828_072722/ev_20130828_072722_hsv_lc.png
> 
> Approximate ground track:
> http://fireballs.ndc.nasa.gov/special/20130828_072722/path.png
> 
> Regards,
> Bill Cooke
> NASA Meteoroid Environment Office
> 
> 
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