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OUT OF MIND » PLANET AWARENESS » GUIDE TO THE NIGHT SKY » Everything you need to know: Eta Aquarid meteor shower

Everything you need to know: Eta Aquarid meteor shower

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PurpleSkyz

PurpleSkyz
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Everything you need to know: Eta Aquarid meteor shower
In 2016, Eta Aquarid meteor shower peaks on mornings of May 5 and 6. How to watch, history, radiant point, what part of Earth is favored, here.

In 2016, the forecast calls for the greatest number of Eta Aquarid meteors to light up the predawn darkness on May 5 and 6. It should be a good year for this shower, with the May 6 new moon guaranteeing deliciously dark skies for the 2016 Eta Aquarids. This shower favors the Southern Hemisphere, ranking as one of the finest showers of the year. At mid-northern latitudes, these meteors don’t fall so abundantly, though mid-northern meteor watchers will catch some, too, and might be lucky enough to catch an earthgrazer – a bright, long-lasting meteor that travels horizontally across the sky – before dawn. The Eta Aquarids are mainly a predawn shower. Follow the links below to learn more about the Eta Aquarid meteor shower.
When and how should I watch the Eta Aquarids?
Radiant point of the Eta Aquarid shower
How many meteors should I expect to see?
Why more Eta Aquarid meteors in the Southern Hemisphere?
Halley’s Comet is the source of the Eta Aquarid meteor shower.
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Everything you need to know: Eta Aquarid meteor shower Meteor-Eta-Aquarid-Mount-Bromo-Justin-Ng
Meteor captured over Mount Bromo, an active volcano in Indonesia, during the 2013 Eta Aquarid shower. Photo by Justin Ng of Singapore. See more photos by Justin Ng.
Everything you need to know: Eta Aquarid meteor shower Meteors-Eta-Aquarids-composite-Colin-Legg-5-6-2013
View larger. | The 2013 Eta Aquarid meteor shower was fantastic as viewed from Earth’s Southern Hemisphere. Colin Legg of Australia created this composite of his experience. He wrote, ‘Composite of approximately 50 images containing 26 meteors, meteor train, 17 % moon, zodiacal light and Pilbara desert.’
When and how should I watch the Eta Aquarids? The 2016 Eta Aquarid meteor shower is expected to produce the greatest number of meteors in the wee hours before dawn on May 5 and 6. However, the broad peak of the Eta Aquarid shower may present a decent showing of meteors during the predawn hours on May 4 and May 7, too.
The best time to watch these fast and often bright meteors is in the early morning hours, before the onset of morning twilight. Don’t know when twilight begins in your part of the world? Try one of the links on our almanac page .
Give yourself at least an hour of viewing time for watching any meteor shower. Meteors tend to come in spurts that are interspersed by lulls. Also, it can take as long as 20 minutes for your eyes to adapt to the dark.
You need no special equipment to watch a meteor shower, but a little luck always helps. Meteor watching is a lot like fishing. Sometimes you catch a good number of them and sometimes you don’t.
Everything you need to know: Eta Aquarid meteor shower Eta-aquarid-shower
Radiant point of Eta Aquarid meteor shower. It’s in the constellation Aquarius, in the southeast before dawn on May mornings, as seen from mid-northern latitudes.
Everything you need to know: Eta Aquarid meteor shower Water_Jar_Aquarius
A Y-shaped asterism called the Water Jar marks the radiant of the Eta Aquarid meteor shower. It’s pretty noticeable in a dark sky.
Radiant point of the Eta Aquarid shower If you trace the paths of the Eta Aquarid meteors backward, they all seem to radiate from a certain point in front of the constellation Aquarius the Water Bearer. This point on the sky’s dome is called the radiant of the meteor shower, which nearly aligns with the faint star Eta Aquarii. Hence, the meteor shower is named in honor of this star.
Eta Aquarii is one of the four stars making up the Y-shaped Water Jar asterism in the northern part of Aquarius. If you can find the Water Jar in the constellation Aquarius, you’ve as good as located the radiant point for the Eta Aquarid meteors. However, the alignment of the radiant and the star is coincidental. Eta Aquarii looms some 170 light-years away while the Eta Aquarid meteors burn up about 100 kilometers (60 miles) above the Earth’s surface.
The higher the radiant appears in your sky, the more Eta Aquarid meteors that you’re likely to see. The radiant soars highest in the nighttime sky just before dawn, so that’s why you tend to see the most meteors in the wee morning hours.
But you don’t have to locate the Water Jar, or the radiant of the shower, to enjoy the Eta Aquarids. These meteors fly every which way across the sky, in front of numerous constellations. Find a dark, open sky away from artificial lights, and sprawl out on a reclining lawn chair to comfortably watch the wondrous nighttime attraction.
How many meteors should I expect to see? In a dark sky, especially at more southerly latitudes, the Eta Aquarids can produce up to 20 to 40 meteors per hour. From mid-northern latitudes, you might only see about 10 meteors per hour. Or you might see more.
Everything you need to know: Eta Aquarid meteor shower Halleys_comet
Halley’s Comet, the parent of the May Eta Aquarid and October Orionid meteor showers. Image Credit: NASAblueshift . Dust from this comet will streak the nighttime as Eta Aquarid meteors on the mornings of May 5 and 6.
Halley’s Comet is the source of the Eta Aquarid meteor shower. Every year, our planet Earth crosses the orbital path of Halley’s Comet in late April and May, so bits and pieces from this comet light up the nighttime as Eta Aquarid meteors. This shower is said to be active from April 19 to May 20, although Earth plows most deeply into this stream of comet debris around May 5 or 6.
The comet dust smashes into Earth’s upper atmosphere at nearly 240,000 kilometers (150,000 miles) per hour. Roughly half of these swift-moving meteors leave persistent trains – ionized gas trails that glow for a few seconds after the meteor has passed.
Our planet also crosses the orbital path of Halley’s Comet at the other end of the year, giving rise to the Orionid meteor shower, which is usually at its best in the predawn hours on or near October 21.
Why not see how many Eta Aquarid meteors you’ll catch in the dark hours before dawn on May 5 and 6?
Bottom line: What’s a good shower for the Southern Hemisphere? In 2016, it’s the Eta Aquarid shower on the mornings of May 5 and 6. It’s okay in the Northern Hemisphere, too! How to watch, some history, chart showing radiant point in this post.
EarthSky’s meteor shower guide for 2016


Thanks to: http://earthsky.org



  

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