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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: 602.4 km/sec
density: 3.8 protons/cm3
explanation | more data
Updated: Today at 2245 UT
X-ray Solar Flares
6-hr max: A0
2245 UT Jul22
24-hr: A0
2245 UT Jul22
explanation | more data
Updated: Today at: 2245 UT
Daily Sun: 22 Jul 08
The sun is blank--no sunspots. Credit: SOHO/MDI
Sunspot number: 0
What is the sunspot number?
Updated 22 July 2008
Far side of the Sun:
This holographic image reveals one possible sunspot on the far side of the sun. Check back tomorrow for confirmation. Image credit: SOHO/MDI
Planetary K-index
Now: Kp= 3 quiet
24-hr max: Kp= 3
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: 6.2 nT
Bz: 1.7 nT north
explanation | more data
Updated: Today at 2246 UT
Coronal Holes:
Earth is inside a solar wind stream flowing from the indicated coronal hole. Credit: SOHO Extreme UV Telescope
SPACE WEATHER
NOAA Forecasts
Updated at: 2008 Jul 22 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 Jul 22 2203 UTC
Mid-latitudes
0-24 hr
24-48 hr
ACTIVE
30 %
20 %
MINOR
15 %
05 %
SEVERE
01 %
01 %
High latitudes
0-24 hr
24-48 hr
ACTIVE
50 %
25 %
MINOR
20 %
10 %
SEVERE
05 %
01 %
What's up in Space
July 22, 2008
AURORA ALERTS: Did you miss the Northern Lights of July 12th? Next time get a wake-up call from Space Weather PHONE.  

DWARF PLANET NAMED: The solar system now has four dwarf planets. The newest member of the club is Makemake (pronounced "MAH-keh MAH-keh"), named by its discoverer Mike Brown after a Polynesian fertility god. (Brown's wife was pregnant when the object was discovered.) The International Astronomical Union (IAU) approved the name on July 19th. Makemake is about two-thirds the size of Pluto and it lies 1.65 times farther from the sun: IAU press release.

BIG SPACE JUNK: Weight: 1400-lb. Size: Like a double-wide refrigerator. It is, in short, one big piece of space junk:


Above: The EAS photographed on July 23, 2007, by ISS astronauts: more.

The Early Ammonia Servicer (EAS), pictured above, was thrown overboard from the International Space Station on July 23, 2007, almost one year ago. At the time, the castaway was in a high orbit and barely visible from Earth's surface. Not anymore: Twelve months later, with its orbit decaying, the EAS has become easy to see.

"The EAS has noticeably brightened," reports veteran satellite observer Marco Langbroek of Leiden, the Netherlands. "A year ago it was a difficult naked eye object at mag. +4 to +4.5, but on July 20, 2008, I easily observed it at mag. +2.5 to +2.0, moving very fast due to its low orbit: photo."

The EAS is expected to reenter Earth's atmosphere and disintegrate near the end of 2008 or early 2009. Until then, you can see it, growing brighter as it descends, with your own eyes. Europeans are favored with flybys this week, North Americans next week. Check our Simple Satellite Tracker to find out when to look.

VIDEO BONUS: On July 15, 2008, Kevin Fetter used a low-light video camera to photograph the EAS orbiting over his home in Brockville, Ontario: movie. "The bright star in the video is Altair," he says. "It was nice to see the EAS still hanging on."

       
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 July 22, 2008 , there were 962 potentially hazardous asteroids.
July 2008 Earth-asteroid encounters:
Asteroid
Date(UT)
Miss Distance
Mag.
Size
2003 YE45
July 13
16.5 LD
15
1.4 km
2008 BT18
July 14
5.9 LD
13
1.0 km
2003 LC5
July 15
62 LD
16
1.4 km
2008 NP3
July 17
6.8 LD
18
85 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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