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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: 424.5 km/sec
density: 1.1 protons/cm3
explanation | more data
Updated: Today at 2244 UT
X-ray Solar Flares
6-hr max: A0
2245 UT Nov17
24-hr: A7
0430 UT Nov17
explanation | more data
Updated: Today at: 2245 UT
Daily Sun: 17 Nov 07
Sunspot 974 poses no threat for solar flares. Credit: SOHO/MDI
Sunspot number: 13
What is the sunspot number?
Updated 16 Nov 2007
Far side of the Sun:
This holographic image reveals one mid-sized sunspot on the far side of the sun. Image credit: SOHO/MDI
Planetary K-index
Now: Kp= 1 quiet
24-hr max: Kp= 3
quiet
explanation | more data
Current Auroral Oval:

Switch to: Europe, USA, New Zealand, Antarctica
Credit: NOAA/POES
Updated: 2007 Nov 17 2122 UT
What is the auroral oval?
Interplanetary Mag. Field
Btotal: 3.6 nT
Bz: 2.1 nT north
explanation | more data
Updated: Today at 2246 UT
Coronal Holes:
Earth is inside a solar wind stream flowing from this coronal hole. Credit: Hinode X-ray Telescope
SPACE WEATHER
NOAA Forecasts
Updated at: 2007 Nov 17 2204 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 Nov 17 2204 UTC
Mid-latitudes
0-24 hr
24-48 hr
ACTIVE
10 %
10 %
MINOR
01 %
05 %
SEVERE
01 %
01 %
High latitudes
0-24 hr
24-48 hr
ACTIVE
15 %
15 %
MINOR
05 %
05 %
SEVERE
01 %
01 %

What's up in Space
November 17, 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.

LEONID METEORS: To people who witnessed the great meteor storms of 1998-2002, the word "Leonid" is synonymous with "spectacular." Alas, this year's display is going to be weak. The Leonid debris stream is criss-crossed by rich tendrils of comet dust, but Earth will miss the richest tendrils in 2007. Forecasters expect no more than about a dozen ordinary meteors per hour when the shower peaks before dawn on Sunday, Nov. 18th.

SPACE STATION: Early yesterday morning, the International Space Station (ISS) passed over the Netherlands where astrophotographer Ralf Vandebergh was waiting with his camera and a 10-inch telescope. He took these pictures:

"My images show the station's new Harmony node and the just-unfurled P6 solar array," points out Vandebergh.

Harmony was delivered to the ISS earlier this month by space shuttle Discovery and moved into its current location just two days ago by astronauts using the station's robotic arm to wrestle the 30,000-lb module into place. Future shuttles will use Harmony as a docking port. Also, two new science labs (Kibo and Columbus) are scheduled to be attached to Harmony later this year and next, further expanding the ISS and making it an even better target for astrophotography.

Would you like to know when the space station is about to fly over your backyard? Sign up for Spaceweather PHONE.

COMET 17P/HOLMES: "It's full of stars!" Not really, but the translucent atmosphere of Comet 17P/Holmes often looks that way when it passes in front of a rich star field. Consider this photo sent by Milan Gucic and Slavko Stojanov of Novi Sad, Serbia:

On Nov. 19th the comet will "swallow" another star--a very bright one--when it glides in front of 2nd-magnitude Mirfak. Already the two are converging nicely: photo. The close encounter is easy to see with the naked eye, just look north after sunset for the star-fuzzball combo in Perseus: sky map. Even better, try a backyard telescope; the view is marvelous.

Comet 17P/Holmes Photo Gallery
[Interactive World Map of Comet Photos]
[sky map] [ephemeris] [3D orbit] [Night Sky Cameras]

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 November 17, 2007 there were 907 potentially hazardous asteroids.
Nov. 2007 Earth-asteroid encounters:
Asteroid
Date(UT)
Miss Distance
Mag.
Size
2005 GL
Nov. 8
8.0 LD
16
280 m
2007 VA3
Nov. 11
7.0 LD
19
30 m
2007 UL12
Nov. 12
18.4 LD
17
325 m
1989 UR
Nov. 24
27.6 LD
15
880 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...
©2007, SpaceWeather.com -- This site is penned daily by Dr. Tony Phillips.
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