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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: 395.7 km/sec
density: 3.6 protons/cm3
explanation | more data
Updated: Today at 2345 UT
X-ray Solar Flares
6-hr max: A0
1940 UT Jan27
24-hr: A0
1030 UT Jan27
explanation | more data
Updated: Today at: 2340 UT
Daily Sun: 27 Jan 09
A new sunspot is forming in the circled region. The low latitude of the spot tentatively identifies it as a member of old Solar Cycle 23. Credit: SOHO/MDI
Sunspot number: 11
What is the sunspot number?
Updated 27 Jan. 2009
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= 2 quiet
24-hr max: Kp= 2
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: 5.3 nT
Bz: 3.7 nT north
explanation | more data
Updated: Today at 2346 UT
Coronal Holes:
A solar wind stream flowing from the indicated coronal hole could hit Earth on or about Jan. 30. However, because of the hole's southern latitude, the stream it is spewing could miss Earth entirely. Credit: SOHO Extreme UV Telescope
SPACE WEATHER
NOAA Forecasts
Updated at: 2009 Jan 27 2201 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: 2009 Jan 27 2201 UTC
Mid-latitudes
0-24 hr
24-48 hr
ACTIVE
01 %
01 %
MINOR
01 %
01 %
SEVERE
01 %
01 %
High latitudes
0-24 hr
24-48 hr
ACTIVE
05 %
05 %
MINOR
01 %
01 %
SEVERE
01 %
01 %
What's up in Space
January 27, 2009

AURORA ALERT: Did you sleep through the Northern Lights? Next time get a wake-up call: Spaceweather PHONE.

 

NASA NEEDS YOU: NASA is forming a mini-Deep Space Network to monitor the "Dark Side" of the Sun. Ham radio clubs with access to 10m dish antennas can join the effort. Read the full story from Science@NASA. If you're an experienced ham with an interest in participating, please contact the STEREO team for technical details.

SOLAR ECLIPSE: When the sun rose yesterday over Gough Island in the remote South Atlantic Ocean, only half of the sun actually appeared. The rest was hidden behind the Moon:

Chantal Steyn took the picture using a Nikon D300. "It was amazing to see the eclipsed sun rise over the ocean waves," she says. "At one point the crescent narrowed to just 20%. Gough Island was a good location for viewing the eclipse despite the cloud cover."

Most of the Jan. 26th eclipse took place over remote places like Gough Island, inhabited mainly by sea birds and transient photographers. A few exceptions: South Africa, Indonesia and the Philippines. Observers there were favored with some very nice crescent suns and even "rings of fire." Browse the gallery for examples:

UPDATED: Jan. 26 Solar Eclipse Gallery
[Submit your photos] [Animated eclipse maps]

THE GREEN COMET COMETH: The first thing that strikes most observers when they see Comet Lulin is the color: It's green! Astrophotographer Günther Strauch recorded the hue on Jan. 26th from his backyard observatory in Borken, Germany:

"This is a composite of 11 half-minute exposures I made using a Canon EOS 40D and a 16-inch Meade telescope," he says.

Green is a sign of poisonous gas. The comet's atmosphere contains toxic cyanogen (CN) and diatomic carbon (C2). Both substances glow green when illuminated by sunlight via a process called "resonant fluorescence."

In 1910, many people panicked when astronomers revealed Earth would pass through the cyanogen-rich tail of Comet Halley. False alarm: The wispy tail of the comet couldn't penetrate Earth's dense atmosphere; even it if had penetrated, there wasn't enough cyanogen to cause real trouble. Comet Lulin will cause even less trouble than Halley did. At closest approach on Feb. 24, 2009, Lulin will stop 38 million miles short of Earth, a distant fuzzball easily seen in binoculars, possibly visible to the unaided eye, utterly harmless. Stay tuned.

Comet Lulin Photo Gallery
[Comet Hunter telescope] [sky map] [ephemeris]


Explore the Sunspot Cycle


Recent Fireballs: Jan. 23, Jan. 17, Dec. 29

       
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 January 27, 2009 there were 1017 potentially hazardous asteroids.
Jan. 2009 Earth-asteroid encounters:
Asteroid
Date(UT)
Miss Distance
Mag.
Size
2008 YC29
Jan. 2
3.4 LD
18
35 m
2008 YY32
Jan. 3
6.2 LD
18
40 m
2008 YG30
Jan. 4
3.6 LD
16
50 m
2008 YV32
Jan. 9
2.7 LD
19
25 m
2008 YF29
Jan. 11
9.7 LD
18
65 m
2002 AO11
Jan. 15
7.7 LD
17
120 m
1998 CS1
Jan. 17
11 LD
12
1.3 km
2009 BS5
Jan. 17
2.4 LD
18
15 m
2009 BJ2
Jan. 21
4.6 LD
19
16 m
2009 BE
Jan. 23
2.1 LD
17
26 m
2009 BD
Jan. 25
1.8 LD
19
10 m
2009 BO5
Jan. 25
6.7 LD
20
19 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 space weather bureau
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.
STEREO
  3D views of the sun from NASA's Solar and Terrestrial Relations Observatory
Daily Sunspot Summaries
  from the NOAA Space Environment Center
Current Solar Images
  from the National Solar Data Analysis Center
Science Central
   
  more links...
   
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