There are numerous reports and videos about a large fireball that made landfall in Russia on February 15th, 2013. Information and videos are still being collected: We will continue to update this page as more information becomes available.
For basic information about fireball meteors please see the fireball FAQ.
From NASA Community Facebook Page
New information provided by a worldwide network of sensors has allowed scientists to refine their estimates for the size of the object that entered that atmosphere and disintegrated in the skies over Chelyabinsk, Russia, at 7:20:26 p.m. PST, or 10:20:26 p.m. EST on Feb. 14 (3:20:26 UTC on Feb. 15).
The estimated size of the object, prior to entering Earth’s atmosphere, has been revised upward from 49 feet (15 meters) to 55 feet (17 meters), and its estimated mass has increased from 7,000 to 10,000 tons. Also, the estimate for energy released during the event has increased by 30 kilotons to nearly 500 kilotons of energy released. These new estimates were generated using new data that had been collected by five additional infrasound stations located around the world – the first recording the event being in Alaska, over 6,500 kilometers away from Chelyabinsk. The infrasound data indicates that the event, from atmospheric entry to the meteor’s airborne disintegration took 32.5 seconds. The calculations using the infrasound data were performed by Peter Brown at the University of Western Ontario, Canada.
“We would expect an event of this magnitude to occur once every 100 years on average,” said Paul Chodas of NASA’s Near-Earth Object Program Office at the Jet Propulsion Laboratory in Pasadena, Calif. “When you have a fireball of this size we would expect a large number of meteorites to reach the surface and in this case there were probably some large ones.”
The trajectory of the Russia meteor was significantly different than the trajectory of the asteroid 2012 DA14, which hours later made its flyby of Earth, making it a completely unrelated object. The Russia meteor is the largest reported since 1908, when a meteor hit Tunguska, Siberia.
A hole in Chebarkul Lake made by meteorite debris. Photo by Chebarkul town head Andrey Orlov.
The fireball that hit Russia’s Urals is the largest rock to strike the planet since 1908, Nature Magazine says. The blast was even more powerful than North Korea’s recent nuclear test, added the UK journal.
The Russian Academy of Science now estimates the meteorite had a mass of around 10 tons before it entered Earth’s atmosphere, and began disintegrating at an altitude of between 30 and 50 kilometers.
Here are some comments made about this event on the meteor obs mailing list.
From Marco Langbroek of the Dutch Meteor Society
With a geocentric radiant at declination -81 degrees for the 2012 DA14 orbit, it is impossible for fragments from an associated “stream” to impact at a latitude as high as 55 North. As seen from the viewpoint of approaching 2012 DA14 fragments, 55 N is the “backside” of the Earth.
From Jeremie Vaubaillon of the IMCCE
Having a look at these videos, taken from Sverdlovsk and Kamensk https://www.youtube.com/watch?v=e686-i7woR4
the bolide was heading very roughly North-East towards South-West.
From Esko Lyytinen
* Note: The following orbital elements produced by Esko Lyytinen were computed within a day of the fireball event with very little calibrated video evidence available. Due to the early release of this orbit, it varies slightly from other published solutions for the fireball.
Using mainly the video and the weather satellite image, with no real good calibrations, I get a
rough solar system orbit ( the last stage by means of Marco Langbroek Excel sheet).
( Entry with velocity 17 km/s ( 17.3) from about az. 97 with the slope of 18 deg. Corresponding (luminous) start heigth (assumed, quite heigh for the velocity, but considers very big size) 100 km and the end 7+ km.)
- q=0.80 AU
- aphelion at 2.53 AU
- node=326.43 ( J2000.0 )
- arg peri=116.0
- 43.6 days after perihelion
The geocentric radiant is 338, +2 This is only of very general quality and given with (a lot) too many decimals.
The orbit does not much resemble the 2009 Feb, 16 innish fireball that I told of yesterday.
According to that solution, the landing site would be not much more than 30 km away from that video recording site. But I do not know the coordinates of this, except very roughly. There quite probably are a lot of small fragments fallen down much earlier along the track, (with possibly a number of bigger ones, besides the main piece).
From Russian Today:
“According to NASA scientists, the trajectory of the Russian meteorite was significantly different than the trajectory of the asteroid 2012 DA14, making it a completely unrelated object. Information is still being collected about the Russian meteorite and analysis is preliminary at this point. In videos of the meteor, it is seen to pass from left to right in front of the rising sun, which means it was traveling from north to south. Asteroid DA14’s trajectory is in the opposite direction, from south to north.”
Here are links to several videos posted by Skywise on meteor obs
720 – 4:45 – hand held – shows trail, then sonic boom with multiple secondaries
720 – 1:46 – hand held – showing trail, sonic boom & secondaries excellent detail of ‘smoke’ rising in portions of trail
240 – 0:18 – hand held – trail, sonic boom & secondaries
720 – 0:54 – in car – no audio – shows entire entry
1080 – 1:34 – hand held vertical – trail, sonic boom & secondaries
720 – 1:05 – security cam – no audio – shows shadow progression
480 – 1:03 – shows trail, closer, multiple sonic booms & secondaries
360 – 2:12 – trail, sonic boom, secondaries, damage