Reports Report 331ac (Event 331-2011)

Observer
Name tom W
Experience Level 3/5
Remarks Not important: would be interested if any info could be forwarded to me about any other info found or other sightings of possible same event. Thanks.
Location
Address louisville, KY
Latitude 38° 7' 20.21'' N (38.122281°)
Longitude 85° 41' 35.4'' W (-85.693166°)
Elevation -
Time and Duration
Local Date & Time 2011-03-23 21:17 EDT
UT Date & Time 2011-03-24 01:17 UT
Duration ≈3.5s
Direction
Moving direction From right to left
Descent Angle 270°
Moving
Facing azimuth 207.91987°
First azimuth 146.51381°
First elevation 87°
Last azimuth 193.74906°
Last elevation 87°
Brightness and color
Stellar Magnitude 1
Color White blue yellow
Concurrent Sound
Observation No
Remarks -
Delayed Sound
Observation Yes
Remarks as stated heard a sort of pop but would be more likely from entry or some sort of sonic boom perhaps, and not from final flash.
Persistent train
Observation No
Duration -1s
Length -1°
Remarks Had a train that faded quickly behind it before becoming unstable and bursting/ exploding in a seemingly almost round pattern that was very shortly visible, less than a second. I probably only witnessed 3 seconds or less of the event. It wasn't exactly straight up but close as it moved quite a distance from east to west. Fairly bright but you could tell it's size was only dwarfed by it's altitude. The train faded quickly behind as if the glowing matter was slowed and cooled after falling or burning away from the main body.
Terminal flash
Observation Yes
Remarks Very high altitude, as mentioned fragments seemed to slow and extinguish quickly. The final fragmenting flash was only 2 to 3 times wider than that of the initial train and faded just as quickly. It was very bright but didn\'t provide any visible illumination on the ground in the least. I thaught I may have heard a pop but it was almost simultaneous with it\'s disintegration, which tells me the pop sound was not from it exploding as the sound would have taken much more time to reach me.
Fragmentation
Observation Yes
Remarks -