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SpaceWeather.com -- News and information about meteor showers, solar flares, auroras, and near-Earth asteroids
SPACE WEATHER
Current conditions
Solar wind
speed: 337.9 km/sec
density: 1.4 protons/cm3
explanation | more data
Updated: Today at 2247 UT
X-ray Solar Flares
6-hr max: A0
2245 UT Dec15
24-hr: A0
2245 UT Dec15
explanation | more data
Updated: Today at: 2245 UT
Daily Sun: 15 Dec 08
The sun is blank--no sunspots. Credit: SOHO/MDI
Sunspot number: 0
What is the sunspot number?
Updated 13 Dec. 2008
Far side of the Sun:
This holographic image reveals no sunspots on the far side of the sun. Image credit: SOHO/MDI
Planetary K-index
Now: Kp= 0 quiet
24-hr max: Kp= 1
quiet
explanation | more data
Current Auroral Oval:
Switch to: Europe, USA, New Zealand, Antarctica
Credit: NOAA/POES
What is the auroral oval?
Interplanetary Mag. Field
Btotal: 3.6 nT
Bz: 2.2 nT south
explanation | more data
Updated: Today at 2247 UT
Coronal Holes:
A solar wind stream flowing from the indicated coronal hole should reach Earth on or about Dec. 21st. Credit: SOHO Extreme UV Telescope
SPACE WEATHER
NOAA Forecasts
Updated at: 2008 Dec 15 2201 UTC
FLARE
0-24 hr
24-48 hr
CLASS M
01 %
01 %
CLASS X
01 %
01 %
Geomagnetic Storms:
Probabilities for significant disturbances in Earth's magnetic field are given for three activity levels: active, minor storm, severe storm
Updated at: 2008 Dec 15 2201 UTC
Mid-latitudes
0-24 hr
24-48 hr
ACTIVE
05 %
10 %
MINOR
01 %
05 %
SEVERE
01 %
01 %
High latitudes
0-24 hr
24-48 hr
ACTIVE
05 %
15 %
MINOR
01 %
05 %
SEVERE
01 %
01 %
What's up in Space
December 15, 2008
NORTHERN LIGHTS: Did you sleep through the auroras of November? Next time get a wake-up call: Spaceweather PHONE.  

SOLAR FLARE SURPRISE: Solar flares are supposed to obliterate everything in their vicinity, yet one of the most powerful flares of the past 30 years has done just the opposite, emitting a beam of pure and unbroken hydrogen atoms. Researchers think this strange event could yield vital clues to the inner workings of solar flares: full story.

GREAT GEMINIDS: The Geminid meteor shower peaked over the weekend and "it was a great show," says NASA astronomer Bill Cooke. "On Saturday night, our all-sky recording system at the Marshall Space Flight Center in Alabama recorded more than 80 bright Geminids in spite of clouds and bright moonlight." Click on the composite image, below, to launch a 4 MB movie:


Play the movie

Another NASA camera with clearer skies in Georgia recorded even more meteors including a rapid-fire flurry of three at once: movie. "This could be one of the best displays of Geminids we've ever seen," says Cooke.

Preliminary counts by the International Meteor Organization indicate that the shower peaked at 160 meteors per hour during the early hours of Dec. 14th. Earth is now exiting the Geminid debris stream and meteor rates are falling--but not yet to zero. Subsiding activity could continue for several nights to come: live updates.

UPDATED: 2008 Geminid Meteor Gallery
[previous years: 2007, 2006, 2004, 2002, 2001]

CHRISTMAS STAR: Scientific theories aiming to explain the biblical "Christmas Star" frequently include Venus. Look at this picture, taken last night by Colorado astronomer Jimmy Westlake, and you can understand why:


Photo details: Fuji Finepix S2, ISO 400, 16 mm Nikkor lens at f2.8, 41 seconds

"After a heavy Colorado snowfall, I wandered up into the National Forest behind my house and found a snow-covered spruce tree," says Westlake. "I positioned my camera (a Fuji Finepix S2) and tripod to capture Venus shining at the apex of the spruce. A small flashlight illuminated the foreground. The result is Venus' own Christmas tree."

Brilliant Venus is dominating the evening sky this holiday season. Look for it hovering over the treetops after sunset. Venus may not be the Christmas Star, but it's a merry substitute. Happy holidays!


Great Conjunction Photo Gallery

       
Near-Earth Asteroids
Potentially Hazardous Asteroids (PHAs) are space rocks larger than approximately 100m that can come closer to Earth than 0.05 AU. None of the known PHAs is on a collision course with our planet, although astronomers are finding new ones all the time.
On December 15, 2008 there were 1010 potentially hazardous asteroids.
Dec. 2008 Earth-asteroid encounters:
Asteroid
Date(UT)
Miss Distance
Mag.
Size
2008 WY94
Dec. 5
3.2 LD
19
35 m
2008 WG14
Dec. 5
4.8 LD
17
49 m
2008 XK
Dec. 6
1.7 LD
17
15 m
2008 XC1
Dec. 12
4.3 LD
16
102 m
2008 XB2
Dec. 13
5.8 LD
18
47 m
2006 VB14
Dec. 14
36 LD
15
795 m
2008 EV5
Dec. 23
8.4 LD
13
435 m
Notes: LD means "Lunar Distance." 1 LD = 384,401 km, the distance between Earth and the Moon. 1 LD also equals 0.00256 AU. MAG is the visual magnitude of the asteroid on the date of closest approach.
Essential Links
NOAA Space Weather Prediction Center
  The official U.S. government space weather bureau
Atmospheric Optics
  The first place to look for information about sundogs, pillars, rainbows and related phenomena.
Solar and Heliospheric Observatory
  Realtime and archival images of the Sun from SOHO.
STEREO
  3D views of the sun from NASA's Solar and Terrestrial Relations Observatory
Daily Sunspot Summaries
  from the NOAA Space Environment Center
Current Solar Images
  from the National Solar Data Analysis Center
Science Central
  a one-stop hub for all things scientific
  more links...
   
©2008, SpaceWeather.com -- This site is penned daily by Dr. Tony Phillips.
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