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The Orionid meteor shower, usually shortened to the Orionids, is the most prolific meteor shower associated with Halley’s Comet. The Orionids are so-called because the point they appear to come from, called the radiant, lies in the constellation Orion, but they can be seen over a large area of the sky. Orionids are an annual meteor shower which last approximately one week in late October. In some years, meteors may occur at rates of 50–70 per hour.
The Orionid meteor shower is produced by the well known Halley’s Comet, which was named after the astronomer Edmund Halley and last passed through the inner solar system in 1986 on its 75- to 76-year orbit. When the comet passes through the solar system, the sun sublimates some of the ice, allowing rock particles to break away from the comet. These particles continue on the comet’s trajectory and appear as meteors (“falling stars”) when they pass through Earth’s upper atmosphere. Halley’s comet is also responsible for creating the Eta Aquariids, which occur each May.
The radiant of the Orionids is located between the constellations Orion and Gemini (in the south-eastern sky before dawn, as viewed from mid-northern latitudes. The most active time of the meteor shower was in the early morning of October 21, 2009 6 a.m. Eastern Standard Time in the United States or 11 a.m. in the United Kingdom. The meteor shower arrived at 230.000 km/h (140,000 miles/hour) on the morning of the 21.
Period: October 2-November 7
Peak: October 20-21
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|Location||: Northern and Southern Emispheres|
|Date||: Oct 21, 2017 00:00|
|Learn More||: Wikipedia|
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