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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: 369.5 km/sec
density: 1.4 protons/cm3
explanation | more data
Updated: Today at 2256 UT
X-ray Solar Flares
6-hr max: B1
2140 UT Dec31
24-hr: C8
0110 UT Dec31
explanation | more data
Updated: Today at: 2245 UT
Daily Sun: 31 Dec 07
The sun is blank, but a new and active sunspot will soon appear on the eastern limb. Credit: SOHO/MDI
Sunspot number: 0
What is the sunspot number?
Updated 31 Dec 2007
Far side of the Sun:
This holographic image reveals one possible sunspot on the far side of the sun. Image credit: SOHO/MDI
Planetary K-index
Now: Kp= 2 quiet
24-hr max: Kp= 2
quiet
explanation | more data
Current Auroral Oval:

Switch to: Europe, USA, New Zealand, Antarctica
Credit: NOAA/POES
Updated: 2007 Dec 31 2116 UT
What is the auroral oval?
Interplanetary Mag. Field
Btotal: 4.8 nT
Bz: 1.4 nT north
explanation | more data
Updated: Today at 2257 UT
Coronal Holes:
A solar wind stream flowing from the indicated coronal hole should reach Earth on Jan. 3rd or 4th. Credit: Hinode X-ray Telescope
SPACE WEATHER
NOAA Forecasts
Updated at: 2007 Dec 31 2203 UTC
FLARE
0-24 hr
24-48 hr
CLASS M
15 %
15 %
CLASS X
05 %
05 %
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 Dec 31 2203 UTC
Mid-latitudes
0-24 hr
24-48 hr
ACTIVE
10 %
10 %
MINOR
05 %
05 %
SEVERE
01 %
01 %
High latitudes
0-24 hr
24-48 hr
ACTIVE
10 %
10 %
MINOR
05 %
05 %
SEVERE
01 %
01 %

What's up in Space
December 31, 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.

SOLAR ACTIVITY ALERT: A sunspot located just out of sight over the sun's eastern limb has unleashed two strong C-class solar flares in the past 24 hours. The sun's rotation should bring this active region into view later today or tomorrow allowing us to evaluate its potential for more explosions. If you have a solar telescope, monitor the limb.

UPDATE: NASA's STEREO-A spacecraft has spotted a bright CME emerging from behind the eastern limb: movie.

HEAVENLY MEETING: Last night, Comet 8P/Tuttle passed by spiral galaxy M33. It was, well... a picture is worth a thousand words:


more galaxy-comet encounter photos

"The emerald-colored comet and M33 were a fantastic late Christmas gift for me," says Gerald DeShirlia who photographed the encounter from his drive way in Wimberley, Texas, using a 7-inch refracting telescope and a Canon 20D digital camera.

Now Comet 8P/Tuttle is heading toward Earth. On Jan. 1st and 2nd it makes its closest approach to our planet--only 24 million miles away. The emerald-colored comet will brighten to a predicted magnitude of 5.8, visible to the unaided eye from dark-sky sites and a fine target for backyard telescopes: sky map.

Comet 8P/Tuttle Photo Gallery
[World Map of Comet Sightings]
[sky maps: Dec. 31, Jan 1] [ephemeris] [orbit] [comet binoculars]

WINTER SUN: "After weeks of cloud cover, we had a brief sun break here in upstate New York--just long enough to enjoy a small prominence as the solar disk passed through tree branches that line the southern exposure from my backyard observatory," says Alan Friedman of downtown Buffalo, NY:

"The sun is currently at 23 degrees in altitude from Buffalo, but it's on the rise! This photo is a composite of several exposures captured with my 92mm Astro-Physics refractor and a Coronado SolarMax hydrogen alpha filter."

more images: from John Nassr of Baguio, the Philippines; from Larry Alvarez of Flower Mound, Texas;

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 December 31, 2007 there were 913 potentially hazardous asteroids.
Jan. 2008 Earth-asteroid encounters:
Asteroid
Date(UT)
Miss Distance
Mag.
Size
2007 TU24
Jan. 29
1.4 LD
10
400 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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