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

[Matson, Robert D.]

Hi Pat,

In addition to the meteor appearing in 6 all-sky cameras, it also
appears in
four different radars, so I'd say the odds aren't bad that a meteorite
or
two might turn up.  --Rob 

-----Original Message-----
From: meteorobs-bounces at meteorobs.org
[mailto:meteorobs-bounces at meteorobs.org] On Behalf Of Pat
Sent: Thursday, August 29, 2013 6:48 AM
To: Meteor science and meteor observing
Subject: Re: (meteorobs) Major fireball event over SouthEast last
evening...

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_0727
> 23A_02A.png 
> http://fireballs.ndc.nasa.gov/special/20130828_072722/ev_20130828_0727
> 22B_03A.png 
> http://fireballs.ndc.nasa.gov/special/20130828_072722/ev_20130828_0727
> 22B_04A.png 
> http://fireballs.ndc.nasa.gov/special/20130828_072722/ev_20130828_0727
> 24A_07A.png
> 
> Videos (Windows Media Format):
> http://fireballs.ndc.nasa.gov/special/20130828_072722/ev_20130828_0727
> 24B_02A.wmv 
> http://fireballs.ndc.nasa.gov/special/20130828_072722/ev_20130828_0727
> 22B_03A.wmv 
> http://fireballs.ndc.nasa.gov/special/20130828_072722/ev_20130828_0727
> 22B_04A.wmv 
> http://fireballs.ndc.nasa.gov/special/20130828_072722/ev_20130828_0727
> 24A_07A.wmv
> 
> Light curve from Huntsville camera:
> http://fireballs.ndc.nasa.gov/special/20130828_072722/ev_20130828_0727
> 22_hsv_lc.png
> 
> Approximate ground track:
> http://fireballs.ndc.nasa.gov/special/20130828_072722/path.png
> 
> Regards,
> Bill Cooke
> NASA Meteoroid Environment Office