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SpaceWeather.com -- News and information about meteor showers, solar flares, auroras, and near-Earth asteroids
 
Solar wind
speed: 376.7 km/sec
density: 5.6 protons/cm3
explanation | more data
Updated: Today at 2345 UT
X-ray Solar Flares
6-hr max: A6
2150 UT Oct11
24-hr: A9
0510 UT Oct11
explanation | more data
Updated: Today at: 2340 UT
Daily Sun: 11 Oct 10
Sunspot 1112 is turning toward Earth. Credit: SDO/HMI. 2-day movie: 8 MB mpg
Sunspot number: 13
What is the sunspot number?
Updated 10 Oct 2010

Spotless Days
Current Stretch: 0 days
2010 total: 45 days (16%)
2009 total: 260 days (71%)
Since 2004: 813 days
Typical Solar Min: 486 days
explanation | more info
Updated 10 Oct 2010


The Radio Sun
10.7 cm flux: 76 sfu
explanation | more data
Updated 10 Oct 2010

Current Auroral Oval:
Switch to: Europe, USA, New Zealand, Antarctica
Credit: NOAA/POES
Planetary K-index
Now: Kp= 3 quiet
24-hr max: Kp= 5
storm
explanation | more data
Interplanetary Mag. Field
Btotal: 6.1 nT
Bz: 3.9 nT south
explanation | more data
Updated: Today at 2346 UT
Coronal Holes: 11 Oct 10
There are no large coronal holes on the Earth-facing side of the sun. Credit: SDO/AIA.
SPACE WEATHER
NOAA Forecasts
Updated at: 2010 Oct 11 2200 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: 2010 Oct 11 2200 UTC
Mid-latitudes
0-24 hr
24-48 hr
ACTIVE
25 %
15 %
MINOR
05 %
01 %
SEVERE
01 %
01 %
High latitudes
0-24 hr
24-48 hr
ACTIVE
35 %
20 %
MINOR
10 %
01 %
SEVERE
01 %
01 %
 
Monday, Oct. 11, 2010
What's up in space
 

AURORA ALERTS: Did you miss the Northern Lights? Next time get a wake-up call from Space Weather PHONE

 

ASTEROID FLYBY: Newly-discovered asteroid 2010 TD54 will fly by Earth on Tuesday, Oct. 12th, about 46,000 km above the planet's surface. At closest approach, the 7-meter space rock will shine like a 14th magnitude star as it races through the constellations Pisces and Aquarius. Advanced amateur astronomers can track the flight of 2010 TD54 using this ephemeris. There is no danger of a collision.

AURORA WATCH: The solar wind is stirring up geomagnetic storms around the Arctic Circle. High-latitude sky watchers should be alert for auroras after local nightfall on Oct. 11-12th. Images: from Calvin Hall of Palmer, Alaska; from Morten Ross of Sandbukta, Norway

SOLAR ACTIVITY: The sun's atmosphere above sunspot 1112 is criss-crossed by a tangled web of magnetic filaments. At the end of the day on Oct. 10th, one of them erupted. Click on the image to view a movie recorded by NASA's Solar Dynamics Observatory:

Because the blast site was located near the sun's eastern limb, Earth was not in the line of fire. The event should not affect our planet. Future eruptions, however, could. Sunspot 1112 and its unstable network of filaments are turning toward Earth, and the next blast could send something our way. Stay tuned for developments.

more images: from Ingmar Glass of Bavaria, Germany; from Cai-Uso Wohler of Bispingen, Germany; from Larry Alvarez of Flower Mound, Texas

CRESCENT PLANET: Venus is moving between Earth and the sun and, in the process, turning its night side toward us. From the terrestrial point of view, only a thin sliver of Venus remains illuminated. Dennis Put sends this picture of the crescent planet from Brielle, The Netherlands:

"Even modest equipment will allow Venus to be viewed as a crescent disk," says Put. "This image was taken in infrared light using a 9-inch Celestron telescope and a DMK21 camera."

The trick is finding Venus. Because the planet is so close to the sun, it hangs very close to the western horizon after sunset. Any low trees or buildings will block the view. One possibility: look before sunset. Venus is actually bright enough to be seen in blue sky. Sky & Telescope makes the following recommendation: "The time to view Venus is in daylight long before sunset — but don't accidentally sweep up the sun! In mid-afternoon, place your scope in the shadow of a building or other obstacle where you have a clear view of the sky 28° to 21° to the sun's left." Observing from inside a shadow means the sun will be safely hidden while you scan the suggested region of sky for Venus. Try it!

more images: from Mariusz Rudziński of Mirostowice Dolne, Poland; from Stephen Williams of Chabot Space and Science Center, Oakland, California;


Sept. 2010 Northern Lights Gallery
[previous Septembers: 2009, 2008, 2007, 2006, 2005, 2004, 2002, 2001, 2000]

  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 October 11, 2010 there were 1149 potentially hazardous asteroids.
Recent & Upcoming Earth-asteroid encounters:
Asteroid
Date(UT)
Miss Distance
Mag.
Size
2010 TQ19
Oct 8
9.6 LD
18
37 m
2010 TS19
Oct 10
3.7 LD
18
31 m
2010 TD54
Oct 12
0.1 LD
14
7 m
2010 TB54
Oct 13
6.1 LD
20
19 m
1999 VO6
Oct 14
34.3 LD
16
1.8 km
2010 TK
Oct 16
4.5 LD
18
37 m
1998 TU3
Oct 17
69.1 LD
13
5.2 km
2010 TG19
Oct 22
1.1 LD
15
70 m
1998 MQ
Oct 23
77.7 LD
15
1.9 km
2007 RU17
Oct 29
39.2 LD
15
1.1 km
2003 UV11
Oct 30
5 LD
12
595 m
3838 Epona
Nov 7
76.8 LD
14
3.4 km
2005 QY151
Nov 16
77.7 LD
17
1.3 km
2008 KT
Nov 23
5.6 LD
21
10 m
2002 EZ16
Nov 30
73.9 LD
16
1.0 km
2000 JH5
Dec 7
47 LD
-
1.5 km
2010 JL33
Dec 9
16.6 LD
13
1.3 km
2008 EA32
Jan 7
76.5 LD
-
2.1 km
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 web 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 Dynamics Observatory
  Researchers call it a "Hubble for the sun." SDO is the most advanced solar observatory ever.
STEREO
  3D views of the sun from NASA's Solar and Terrestrial Relations Observatory
Solar and Heliospheric Observatory
  Realtime and archival images of the Sun from SOHO.
Daily Sunspot Summaries
  from the NOAA Space Environment Center
Heliophysics
  the underlying science of space weather
Science Central
   
  more links...
 
 
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