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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: 574.6 km/sec
density: 2.5 protons/cm3
explanation | more data
Updated: Today at 2245 UT
X-ray Solar Flares
6-hr max: A0
2245 UT Feb18
24-hr: A0
0100 UT Feb18
explanation | more data
Updated: Today at: 2245 UT
Daily Sun: 18 Feb 08
The sun is blank--no sunspots. Credit: SOHO/MDI
Sunspot number: 0
What is the sunspot number?
Updated 18 Feb 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= 3 quiet
24-hr max: Kp= 4
unsettled
explanation | more data
Current Auroral Oval:

Switch to: Europe, USA, New Zealand, Antarctica
Credit: NOAA/POES
Updated:
What is the auroral oval?
Interplanetary Mag. Field
Btotal: 5.5 nT
Bz: 3.3 nT north
explanation | more data
Updated: Today at 2246 UT
Coronal Holes:
A weak solar wind stream flowing from this minor coronal hole could reach Earth on or about Feb. 21st. Credit: SOHO Extreme UV Telescope
SPACE WEATHER
NOAA Forecasts
Updated at: 2008 Feb 18 2203 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 Feb 18 2203 UTC
Mid-latitudes
0-24 hr
24-48 hr
ACTIVE
10 %
05 %
MINOR
05 %
01 %
SEVERE
01 %
01 %
High latitudes
0-24 hr
24-48 hr
ACTIVE
15 %
10 %
MINOR
10 %
05 %
SEVERE
05 %
01 %

What's up in Space
February 18, 2008
Where's Saturn? Is that a UFO--or the ISS? What's the name of that star? Get the answers from mySKY--a fun new astronomy helper from Meade.   mySKY

PRESIDENTIAL PROMS: "There are some nice big prominences on the northeast limb of the sun today--President's Day in the United States," reports Greg Piepol of Rockville, Maryland. This snapshot through his SolarMax90 compares the giant, fiery clouds to Earth. Readers with solar telescopes, take a look!

SIGHTINGS: This morning at 4:30 a.m. EST, space shuttle Atlantis undocked from the International Space Station. Now sky watchers around the world are seeing the two spaceships side-by-side. "Here they are flying in formation past Venus in early morning twilight," reports Rob Carew of Melbourne, Australia:

Tonight the flybys continue over the United States. The two spaceships will appear as closely spaced points of light silently gliding in tandem through the twilight sky--an unforgettable sight. Check Heavens Above to find flyby times for your hometown or sign up for easy flyby alerts from Spaceweather PHONE.

more images: from Ashmeet Singh of New Delhi, India; from Kevin Baird of San Diego, California;

SOLAR TRANSIT: Meanwhile in broad Italian daylight, Riccardo Di Nasso of Pisa recorded a space station flyby ... of the sun:

"On Feb. 16th, after two years of tests and practice, I finally photographed a transit of the ISS across the sun. (Space shuttle Atlantis is there, too, somewhere in the silhouette.) It was a splendid sunny day; the ISS transited quickly, but right on time," says Di Nasso. He took the picture using a new Nikon D300 and a sun-filtered Skywatcher telescope.

more images: from Lynn van Rooijen of Broek in Waterland, the Netherlands ("This may not look like much, but it was a challenge as the total transit of the ISS + Atlantis was less than 1 second!" says van Rooijen.)

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. [comment]
On February 18, 2008 there were 926 potentially hazardous asteroids.
Feb. 2008 Earth-asteroid encounters:
Asteroid
Date(UT)
Miss Distance
Mag.
Size
2008 CT1
Feb. 5
0.3 LD
15
13 m
2007 DA
Feb. 12
9.8 LD
18
140 m
2008 CK70
Feb. 15
1.0 LD
16
40 m
4450 Pan
Feb. 19
15.9 LD
13
1.6 km
2002 TD66
Feb. 26
16.7 LD
15
440 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 bureau for real-time monitoring of solar and geophysical events, research in solar-terrestrial physics, and forecasting solar and geophysical disturbances.
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.
Daily Sunspot Summaries
  From the NOAA Space Environment Center
Current Solar Images
  from the National Solar Data Analysis Center
  more links...
©2008, SpaceWeather.com -- This site is penned daily by Dr. Tony Phillips.
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