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Showing posts with label asteroid. Show all posts
Showing posts with label asteroid. Show all posts

Wednesday, 6 November 2013

Hazardous asteroids may be more numerous than previously thought, scientists say.

By Joel Achenbach

There are scads of building-size, potentially hazardous asteroids lurking in Earth’s immediate neighborhood, and they may be colliding with the planet 10 times more often than scientists have previously believed, according to a new study published Wednesday that examined the airburst of a 25-million-pound asteroid earlier this year near the Russian city of Chelyabinsk.
Three studies released Wednesday, two in the journal Nature and one in the journal Science, have provided the most detailed description and analysis of the dramatic event on the morning of Feb. 15. 

Scientists now estimate the diameter of the object at just a hair under 20 meters, or about 65 feet. Undetected by astronomers, the rock came out of the glare of the sun and hit the atmosphere at 43,000 miles per hour.

Friday, 15 February 2013

La NASA descarta que el meteorito y el asteroide estén relacionados....

Según los científicos de la NASA, “la trayectoria del meteorito que ha caído en Rusia es significativamente diferente de la trayectoria del asteroide 2012 DA14, lo que supone que se trata de objetos que no tienen ninguna relación”. Todavía se está recopilando información del primero y los análisis son aún preliminares, añade la agencia espacial estadounidense. “En los vídeos se ve cómo el meteorito pasa de izquierda a derecha frente al Sol elevándose, lo que significa que estaba viajando de Norte a Sur, mientras que la trayectoria del asteroide 2012 DA14 va en la dirección opuesta, de Sur a Norte”.

Los datos que van obteniendo los científicos se inclinan claramente hacia descartar que se trate de objetos relacionados y se han hecho estimaciones de la masa y tamaño del meteorito de Siberia.

Thursday, 7 February 2013

2012 DA14: Too close for comfort

It's an asteroid, it's called 2012 DA14, it was only discovered last year, it is going to pass by Earth on Friday of next week (February 15) and it is going to set a record for a close miss of a space object. This monster is approaching at 4.8 miles per second. However, there is good news. It isn't going to hit... so they say.
The Russian Federal Space Agency (Federal'noe Kosmicheskoe Agentsvo) confirms that the object will fly near the Earth on February 16 MSK time, between approximately twenty to twenty-five miles from our planet (nearest point 17,200 miles). This is lower than some geostationary satellites and even closer than the upcoming near-impact with the Doomsday Asteroid, Apophis, scheduled for 2029.

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