2014 Orionid Meteor Shower
 
Oct. 17, 2014:  Waking up before sunrise is a good way to get a head start on
the day. On Oct. 21st, waking up before sunrise could stop you in your tracks.
 
Blame Halley's Comet.  Every year in mid-to-late October, Earth passes through
a stream of dusty debris from Comet Halley, and the pre-dawn sky can light up
with a pretty display of shooting stars.
 
http://science.nasa.gov/media/medialibrary/2014/10/17/skymap.gif
 
Orionid meteors fly out of a radiant near the shoulder of Orion, the Hunter.
In this sky map, the radiant is denoted by a red dot. Although the meteors
emerge from a single point, they can appear anywhere in the sky. Image credit:
Dr. Tony Phillips [Larger image]
 
"We expect to see about 20 meteors per hour when the shower peaks on Tuesday
morning, Oct 21st," says Bill Cooke, the head of NASA's Meteoroid Environment
Office.  "With no Moon to spoil the show, observing conditions should be
ideal."
 
Because these meteors streak out of the constellation Orion, astronomers call
them "Orionids."
 
"The Orionid meteor shower is not the strongest, but it is one of the most
beautiful showers of the year," notes Cooke.
 
The reason is its setting: The shower is framed by some of the brightest stars
in the heavens. Constellations such as Taurus, Gemini and Orion provide a
glittering backdrop for the display.  The brightest star of all, Sirius, is
located just below Orion's left foot, a good place to point your camera while
you're waiting for meteors.
 
http://www.spaceweather.com/meteors/orionids/images2009/Jefferson-Teng1.jpg
 
An Orionid meteor streaks over the city lights of Shanghai in 2009. Credit:
Jefferson Teng To see the show, Cooke suggests going outside one to two hours
before sunrise when the sky is dark and the constellation Orion is high
overhead. Lie down on a blanket with a broad view of the heavens.  Although
Orionids emerge from a small area near the shoulder of Orion, they will spray
across the entire sky.
 
"Be prepared for speed," he adds.  "Meteoroids from Halley's Comet strike
Earth's atmosphere traveling 148,000 mph.  Only the November Leonids are
faster."
 
Speed is important because fast meteors have a tendency to explode.
Occasionally, Orionid fireballs will leave incandescent streams of debris in
their wake that linger for minutes. Such filaments of "meteor smoke" twisted
by upper atmospheric winds into convoluted shapes can be even prettier than
the meteors themselves.
 
"It really is a wonderful morning to be awake," says Cooke.  "Just don't plan
on going anywhere in a hurry."
 
Credits:
Author: Dr. Tony Phillips | Production editor: Dr. Tony Phillips | Credit:
Science@NASA
 
More information:
 
NASA Meteoroid Environment Office -- home page
 
 
Regards,
 
Roger

--- D'Bridge 3.99
 * Origin: NCS BBS - Houma, LoUiSiAna (1:3828/7)