Image of Tuesday morning fireball caught by an all-sky camera atop the Allegheny Observatory in
Pittsburgh. (Image Sources: NASA, Allegheny Observatory, American Meteor Society, WPXI-TV 11)
By Glenn A. Walsh
Reporting for SpaceWatchtower
Early Tuesday morning, a bright fireball
was observed by many people in the Pittsburgh area, and throughout
much of Pennsylvania, Ohio, Michigan, Indiana, and New York. One of
the largest such meteors observed since the Chelyabinsk, Russia
meteor almost exactly two years earlier, fortunately in this case
there has been no damage on the ground reported.
Friends of the Zeiss received an
eye-witness report from a woman in the Pittsburgh suburb of Fox
Chapel, who reported, “Gazing out my window, there was a blazing,
streaking, yellow orange light heading N. to slightly N.E. It
had a slightly wide & long "tail" & was bright
enough to light my room as though it was a searchlight.” She
also noted “the sound of a distant boom” two minutes after seeing
the meteor.
The American Meteor Society, which
collects fireball and meteor reports from the general public,
received 125 eye-witness reports about the event that occurred around
4:50 a.m. Eastern Standard Time (EST) / 9:50 Coordinated Universal
Time (UTC) on February 17. Three witnesses in the Pittsburgh area
also reported hearing a delayed boom after seeing the fireball.
Images and video of the meteor were
caught by three NASA cameras, including one on the roof of
Pittsburgh's Allegheny Observatory. These are part of NASA's All-Sky
Fireball Network, currently a network of 15 specialized,
black-and-white video cameras, with lenses that allow for a view of
the whole night sky overhead.
NASA estimates that the meteoroid, at
the point it entered Earth's atmosphere, probably weighed about 500
pounds and was traveling about 45,000 miles per hour. Even though the
dense space rock was only about two feet in diameter, after entering
the atmosphere it flared-up brighter than a Full Moon. NASA also
noted that, from the meteor's apparent orbit, it probably originated
in the main asteroid belt between Mars and Jupiter.
Yesterday, in an interview with
Pittsburgh's KDKA-TV 2, Dr. Brendan Mullan, Director of the Henry
Buhl, Jr. Planetarium and Observatory at Pittsburgh's Carnegie
Science Center, mentioned that if remnants of the meteor reached the
ground, they may have fallen near Kittanning, Pennsylvania (44 miles
northeast of Pittsburgh). The American Meteor Society estimates, from
witness reports, that the fireball trajectory did take it over
Clarion County and northern Armstrong County in Western Pennsylvania.
It is estimated that only 10 percent of a large meteor, or in this case about 50 pounds of meteoric material, could have, potentially, reached the ground. The rest of the meteor would have been lost to the light and heat that created the fireball. Most small meteors are completely vaporized in the atmosphere. The fact that this meteor was large enough to create a sonic boom means there is a possibility that some meteoric material may have reached the ground.
With snowfalls since the fireball
observation possibly covering any such remnants, meteorites from this
meteor may not be found until Spring, at the earliest. And, even
after the snow is gone, finding a remnant from this meteor could be
quite difficult.
Video of Pittsburgh Fireball, from NASA camera atop Pittsburgh's Allegheny Observatory:
Link >>> https://www.youtube.com/watch?v=7wqEHVvdJuU
More on NASA's All-Sky Fireball Network: Link >>>
http://fireballs.ndc.nasa.gov/
NASA animation showing apparent trajectory of Pittsburgh Fireball:
Link >>>
https://www.facebook.com/video.php?v=857973824261845
American Meteor Society reports and graphics regarding the Pittsburgh Fireball:
Link >>>
http://www.amsmeteors.org/2015/02/early-morning-pittsburgh-fireball/
Related Blog Post ---
1938 Fireball Explosion Over W PA Remembered (2013 March 11):
Special Thanks: Eric G. Canali, former Floor Manager of Pittsburgh's original Buhl Planetarium and Institute of Popular Science and Founder of the South Hills Backyard Astronomers amateur astronomy club.
Source: Glenn A. Walsh Reporting for
SpaceWatchtower, a project of Friends of the Zeiss.
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* Civil War Museum of Andrew Carnegie Free Library:
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*
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