Wednesday, April 10, 2013

April 22 meteor shower ----- LYRIDS



The Lyrids (LYR) are a meteor shower lasting from April 16 to April 26 each year. The radiant of the meteor shower is located in the constellation Lyra, near this constellation's brightest star, Alpha Lyrae (proper name Vega); hence they are also called the Alpha Lyrids and sometimes the April Lyrids. The source of the meteor shower is particles of dust shed in the cometary tail generated by the periodic Comet C/1861 G1 Thatcher. The Lyrids have been observed for the past 2600 years.

The shower usually peaks on around April 22 and the morning of April 23. Counts typically range from 5 to 20 meteors per hour, averaging around ten. As a result of light pollution, observers in the country will see more, observers in the city fewer. Nights without a moon in the sky will reveal the most meteors.
 
The Lyrid meteor shower has been observed for more than 2,000 years; Chinese records say "stars fell like rain" during the shower of 687 BC. But in recent times the Lyrids have generally been weak. They have a brief maximum that lasts for less than a day, and even then only 10 to 20 Lyrids per hour may appear. One of the unpredictable aspects of this shower, though, is that it’s known for uncommon surges that sometimes result in up to 100 shooting stars per hour.

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