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The Perseids are Coming
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Author:  Sky_Watcher [ Fri Jul 31, 2009 3:03 pm ]
Post subject:  The Perseids are Coming

From http://science.nasa.gov/headlines/y2009 ... ds2009.htm

July 31, 2009: Earth is entering a stream of dusty debris from Comet Swift-Tuttle, the source of the annual Perseid meteor shower. Although the shower won't peak until August 11th and 12th, the show is already getting underway.

Brian Emfinger of Ozark, Arkansas, photographed this early Perseid just after midnight on Sunday, July 26th:

Image

"I used an off-the-shelf digital camera to capture this fireball and its smoky trail," says Emfinger. "It was a bright one!"

Don't get too excited, cautions Bill Cooke of NASA's Meteoroid Environment Office. "We're just in the outskirts of the debris stream now. If you go out at night and stare at the sky, you'll probably only see a few Perseids per hour."

This will change, however, as August unfolds.

"Earth passes through the densest part of the debris stream sometime on August 12th. Then, you could see dozens of meteors per hour."

For sky watchers in North America, the watch begins after nightfall on August 11th and continues until sunrise on the 12th. Veteran observers suggest the following strategy: Unfold a blanket on a flat patch of ground. (Note: The middle of your street is not a good choice.) Lie down and look up. Perseids can appear in any part of the sky, their tails all pointing back to the shower's radiant in the constellation Perseus. Get away from city lights if you can.

There is one light you cannot escape on August 12th. The 55% gibbous Moon will glare down from the constellation Aries just next door to the shower's radiant in Perseus. The Moon is beautiful, but don't stare at it. Bright moonlight ruins night vision and it will wipe out any faint Perseids in that part of the sky.

Image
Above: Looking northeast around midnight on August 11th-12th. The red dot is the Perseid radiant. Although Perseid meteors can appear in any part of the sky, all of their tails will point back to the radiant. Image copyright: Spaceweather.com, used with permission.

The Moon is least troublesome during the early evening hours of August 11th. Around 9 to 11 p.m. local time (your local time), both Perseus and the Moon will be hanging low in the north. This low profile reduces lunar glare while positioning the shower's radiant for a nice display of Earthgrazers.

"Earthgrazers are meteors that approach from the horizon and skim the atmosphere overhead like a stone skipping across the surface of a pond," explains Cooke. "They are long, slow and colorful—among the most beautiful of meteors." He notes that an hour of watching may net only a few of these at most, but seeing even one can make the whole night worthwhile.

The Perseids are coming. Enjoy the show.

Author:  Tweaked [ Fri Jul 31, 2009 8:26 pm ]
Post subject:  Re: The Perseids are Coming

I wonder if the view will be any better from the "AIR..." We'll be flying east, over night, on August 11th...

Author:  Sky_Watcher [ Tue Aug 11, 2009 3:26 pm ]
Post subject:  Re: The Perseids are Coming

SPACEWEATHER RADIO: The US Air Force Space Surveillance Radar is scanning the skies over North America. When a Perseid meteor passes overhead--"ping"--there is an echo.

Tune into Spaceweather Radio for a live audio feed from the radar facility.

http://spaceweatherradio.com/

Author:  Timbit [ Wed Aug 12, 2009 1:05 am ]
Post subject:  Re: The Perseids are Coming

You rock SkyWatcher, thank you so much for that!!

Tim

Author:  Tweaked [ Wed Aug 12, 2009 2:01 am ]
Post subject:  Re: The Perseids are Coming

I hope we can see something from the plane... I have a window seat.

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