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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: 671.9 km/sec
density: 1.3 protons/cm3
explanation | more data
Updated: Today at 2243 UT
X-ray Solar Flares
6-hr max: A0
2155 UT Sep29
24-hr: A0
2155 UT Sep29
explanation | more data
Updated: Today at: 2245 UT
Daily Sun: 29 Sep 07
New sunspot 971 (mis-numbered as "970" in yesterday's edition of spaceweather.com) poses no threat for solar flares. Credit: SOHO/MDI
Sunspot number: 15
What is the sunspot number?
Updated 28 Sep 2007
Far side of the Sun:
This holographic image reveals no large sunspots on the far side of the sun. Image credit: SOHO/MDI
Planetary K-index
Now: Kp= 4 unsettled
24-hr max: Kp= 5
mild
explanation | more data
Current Auroral Oval:

Switch to: Europe, USA, New Zealand, Antarctica
Credit: NOAA/POES
Updated: 2007 Sep 29 2125 UT
What is the auroral oval?
Interplanetary Mag. Field
Btotal: 4.1 nT
Bz: 2.6 nT south
explanation | more data
Updated: Today at 2245 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: 2007 Sep 29 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: 2007 Sep 29 2203 UTC
Mid-latitudes
0-24 hr
24-48 hr
ACTIVE
20 %
10 %
MINOR
15 %
05 %
SEVERE
05 %
01 %
High latitudes
0-24 hr
24-48 hr
ACTIVE
25 %
10 %
MINOR
15 %
05 %
SEVERE
10 %
01 %

What's up in Space
September 29, 2007
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. .

SUPER-METEOR: Last night, a fireball reported to be 100 times brighter than a full Moon streaked over Finland. Witnessness say the meteor exploded in mid-air, but it is not yet known if large pieces of the space rock fell to the ground. Stay tuned for updates.

NORTHERN LIGHTS: Northern sky watchers should be alert for auroras tonight. Earth is inside a high-speed solar wind stream that is causing intermittant geomagnetic storms. Here is the view this morning from Mo i Rana, Norway,


Photo details: Nikon D80, Sigma 20mm lens, 10s at f/2.2. ISO 400

"These were my first auroras of the season--and nice and bright ones, too!" says photographer Petter Hamnes. They had to be bright to pierce the glare of the nearly full Moon. Lunar interference isn't all bad, however; note the lovely moonlit waterfall in the foreground.

September 2007 Aurora Gallery
[August 2007 Aurora Gallery] [Aurora Alerts]

SPACECRAFT OVER TYCHO: Two nights ago in Southgate, Michigan, Mark Wloch photographed a spacecraft flying past lunar crater Tycho:


Photo details: Celestron C-8, Philips ToUcam Pro II @ 30 fps, 1/500s per frame.

"It was the International Space Station," he says. "I captured the transit using my 8-inch Celestron telescope and a Philips ToUcam Pro II video camera." The station's silhouette (sometimes likened to that of a TIE fighter) nicely traces the 256-foot solar wings that provide power for the two cosmonauts and one astronaut now onboard.

Next week, the sprawling station will appear not in silhouette but as a radiant point of light gliding through the night sky of many US towns and cities. Check Heaven's Above for flyby timetables--or let us call you when the ISS is about to appear over your home town.

 

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 September 29, 2007 there were 888 potentially hazardous asteroids.
Sept. 2007 Earth-asteroid encounters:
Asteroid
Date(UT)
Miss Distance
Mag.
Size
2007 RF1
Sep. 2
8.5 LD
18
26 m
2007 RS1
Sep. 5
0.2 LD
17
3 m
2007 RJ1
Sep. 16
2.5 LD
16
40 m
2007 RC20
Sep. 20
5.1 LD
19
22 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 Environment 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...
©2007, SpaceWeather.com -- This site is penned daily by Dr. Tony Phillips.
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