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The Russia Asteroid Airburst from Telegraph (UK) Text

Impact location injuries and damage

1,000 injuries, of those 100+ were hospitalized.

297 Buildings damaged including 6 hospitals and 12 schools.

Main meteorite impacted eighty miles of west Chelyabinsk. Map insert shows Chelyabinsk below Ykaterinburg and southeast of Moscow.

Meteorite debris hit zinc factory here [indicates area between roads M5, E30, and M51].

Meteorite in numbers

• The bright initial fireball was caused by rapidly ionizing gases in the atmosphere.
• The meteor hit the atmosphere at an initial speed of 10-13 miles per second.
• The object entered the atmosphere 32 miles up. The sonic boom took two minutes and 30 seconds to reach the ground.
• Meteors of this size are said to hit the Earth on the order of once a decade.
• The meteorite produced many fragments over a wide area. The main piece hit a lake 80 miles west of Chelyabinsk.

Asteroid and meteor paths

The meteor which hit Russia is entirely unconnected to the flyby of the massive 130,000 ton asteroid 2012 DA 14 which is expected to miss the Earth by a narrow margin at 19.25 TMT on Friday 15, February 2013. The two Asteroids come from completely different directions.

Graphic shows the approximate path of the Russian meteor coming from the side of the sun, on the left, impacting Russia at 03:15 GMT. The Asteroid 2012 DA14 path shows movement from the bottom crossing the moon鈥檚 orbit and traveling through the Typical GPS Satellite Orbit between 18:00 and 21:00 passing earth on the right.

The asteroids compared

Graphic of a space shuttle is smaller than the Asteroid 2012 DA14 which was 50m and the Russian Meteor is much smaller than both at 2m (approx.).

Sources Dr. Simon Green, senior lecturer in planetary and space sciences at the Open University, P. Chodas NASA & @breakingnews.

Yarkovsky Effect

Sun in center of dashed line with an counterclockwise arrow. Two objects circle the sun on opposite sides with red wavy lines for afternoon emission.

The object on the right indicates with an arrow pointing counterclockwise and text 鈥淵arkovsky push same as orbit motion: spirals outward; rotation same as origin motion.鈥�

The object on the left indicates with an arrow pointing clockwise and text 鈥淵arkovsky push opposite orbit motion: spirals inward; rotation opposite as origin motion.鈥�

Because any material takes some time to heat up, it emits more infrared energy in the afternoon than in the morning. This extra afternoon emission provides a small push like a tiny rocket (from Newton鈥檚 3^rd law) that鈥檚 always 鈥渙n鈥� called the 鈥淵arkovsky effect鈥�. The Yarkovsky effect can make the object spiral outward away from the Sun if the object is spinning in the same direction as its orbit motion or spiral inward toward the Sun if the object is spinning in the opposite direction as its orbit motion.