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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: 568.0 km/sec
density: 1.9 protons/cm3
explanation | more data
Updated: Today at 2136 UT
X-ray Solar Flares
6-hr max: A0
2245 UT Nov23
24-hr: A0
1240 UT Nov23
explanation | more data
Updated: Today at: 2245 UT
Daily Sun: 23 Nov 07
Readers report that a new sunspot group is forming near the center of the solar disk. If you have a solar telescope, take a look. Credit: SOHO/MDI
Sunspot number: 0
What is the sunspot number?
Updated 21 Nov 2007
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= 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 23 2055 UT
What is the auroral oval?
Interplanetary Mag. Field
Btotal: 2.8 nT
Bz: 0.7 nT south
explanation | more data
Updated: Today at 2137 UT
Coronal Holes:
Earth is inside a solar wind stream flowing from the indicated coronal hole. Credit: Hinode X-ray Telescope
SPACE WEATHER
NOAA Forecasts
Updated at: 2007 Nov 23 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 Nov 23 2203 UTC
Mid-latitudes
0-24 hr
24-48 hr
ACTIVE
15 %
15 %
MINOR
05 %
05 %
SEVERE
01 %
01 %
High latitudes
0-24 hr
24-48 hr
ACTIVE
20 %
20 %
MINOR
10 %
10 %
SEVERE
05 %
05 %

What's up in Space
November 23, 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.

MARS DOUBLES IN BRIGHTNESS: During the past month, Mars has doubled in brightness and now it is putting on a nice show for backyard stargazers. A good night to look is Nov. 26th when Mars has an eye-catching close encounter with the Moon: full story.

3D SOLAR MINIMUM: The solar cycle is at low ebb; now is the time of "solar minimum." But even when the sun is blank and quiet, it can still leap out at you. Put on your 3D glasses and regard the following:

"In 3D, the silent sun comes alive," says Greg Piepol of Rockville, Maryland, who created the anaglyph by combining images he captured through his Coronado SolarMax90. If you don't have 3D glasses, he advises, "a pair of red and blue astronomical filters will work, too." Click here for more 3D!

COMET 17P/HOLMES: "Tonight the Moon was so bright it made Comet Holmes difficult to see with the unaided eye," reports Günther Strauch of Borken, Germany. "I decided to make this composite photo of the Moon and comet both shot to the same scale with my Canon 20D."

His image shows the main reason why exploding Comet Holmes is fading from view: it is spread out and increasingly dilute. Bright moonlight only makes matters worse. Indeed, the comet may become very difficult to see in the nights ahead as the Moon becomes full on Saturday, Nov. 24th. Solution: use a backyard telescope to pierce the glare. With the assistance of a finderscope, the comet remains easy to locate in the constellation Perseus right beside the bright star Mirfak: sky map.

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 23, 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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