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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: 342.2 km/sec
density: 2.1 protons/cm3
explanation | more data
Updated: Today at 2347 UT
X-ray Solar Flares
6-hr max: B1
1800 UT Aug12
24-hr: B2
0035 UT Aug12
explanation | more data
Updated: Today at: 2340 UT
Daily Sun: 12 Aug 10
Sunspot 1093 is splitting in two. Readers with solar telescopes should take a look! Credit: SDO/HMI
Resolutions: 4096, 1024, 512
Sunspot number: 66
What is the sunspot number?
Updated 11 Aug 2010

Spotless Days
Current Stretch: 0 days
2010 total: 35 days (15%)
2009 total: 260 days (71%)
Since 2004: 803 days
Typical Solar Min: 486 days
explanation | more info
Updated 11 Aug 2010


The Radio Sun
10.7 cm flux: 86 sfu
explanation | more data
Updated 11 Aug2010

Current Auroral Oval:
Switch to: Europe, USA, New Zealand, Antarctica
Credit: NOAA/POES
Planetary K-index
Now: Kp= 0 quiet
24-hr max: Kp= 2
quiet
explanation | more data
Interplanetary Mag. Field
Btotal: 3.0 nT
Bz: 0.8 nT south
explanation | more data
Updated: Today at 2347 UT
Coronal Holes:
A narrow ssolar wind stream flowing from this sinuous coronal hole could reach Earth on August 15th. Credit: SDO/AIA
SPACE WEATHER
NOAA Forecasts
Updated at: 2010 Aug 12 2201 UTC
FLARE
0-24 hr
24-48 hr
CLASS M
05 %
05 %
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 Aug 12 2201 UTC
Mid-latitudes
0-24 hr
24-48 hr
ACTIVE
10 %
10 %
MINOR
01 %
01 %
SEVERE
01 %
01 %
High latitudes
0-24 hr
24-48 hr
ACTIVE
10 %
10 %
MINOR
01 %
01 %
SEVERE
01 %
01 %
What's up in Space
August 12, 2010

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

 

SUNSET PLANET SHOW: When the sun goes down tonight, step outside and look west. Venus, Mars, Saturn and the crescent Moon are having a lovely 4-way conjunction. It's a great way to warm up for the Perseid meteor shower, which peaks on Thursday night, August 12th. Get the full story from Science@NASA. Sky maps: August 12, 13.

PERSEID METEOR SHOWER: The annual Perseid meteor shower is underway. According to the International Meteor Organization, dark-sky observers are now counting more than 35 Perseids per hour, including many fireballs. Be alert for Perseids from 10 pm on Thursday, Aug. 12th, until sunrise on Friday, Aug. 13th. The darkest hours before dawn are usually best.

Last night, Brian A. Klimowski caught this Perseid streaking over the San Francisco Peaks near Flagstaff, Arizona:

"I used a Canon 7D set at ISO4000 with an exposure time of 30 seconds," says Klimowski. Readers, take note of those settings. They might come in handy tonight when the meteor rate approaches one hundred per hour in some places. Point, click, and submit your images here.

Key Perseid Resources:

SUNSPOT TWINS: Sunspot 1093 is splitting in two. "Pass the cigar," says photographer Alan Friedman, "it's twins!" He sends this picture from his backyard observatory in Buffalo, New York:

During the past 48 hours, the dark core of the sunspot has divided itself into two Earth-sized pieces. The process resembles cellular mitosis. Whether this event heralds the breakup and eventual quieting of the active region--or conversely, a multiplication of its size and activity--remains to be seen.

Either way, "it's is a nice photo-op for astronomers with solar telescopes," says Friedman. "Take a look!"

more images: from Jimmy Eubanks of Boiling Springs, SC; from Rogerio Marcon of Campinas SP Brasil; from Pavol Rapavy of Rimavska Sobota, Slovakia; from the Solar Dynamics Observatory in Earth orbit;


Updated: Solar Eclipse Photo Gallery
[NASA: South Pacific Eclipse] [animated map]


August 2010 Northern Lights Gallery
[previous Augusts: 2009, 2008, 2007, 2006, 2005, 2004, 2003]

 

 
       
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 August 12, 2010 there were 1142 potentially hazardous asteroids.
Upcoming Earth-asteroid encounters:
Asteroid
Date(UT)
Miss Distance
Mag.
Size
2005 NZ6
Aug 14
60.5 LD
18
1.3 km
2002 CY46
Sep 2
63.8 LD
16
2.4 km
2010 LY63
Sep 7
56 LD
18
1.2 km
2009 SH2
Sep 30
7.1 LD
25
45 m
1998 UO1
Oct 1
32.1 LD
17
2.1 km
2005 GE59
Oct 1
77 LD
18
1.1 km
2001 WN5
Oct 10
41.8 LD
18
1.0 km
1999 VO6
Oct 14
34.3 LD
17
1.8 km
1998 TU3
Oct 17
69.1 LD
15
5.3 km
1998 MQ
Oct 23
77.7 LD
17
1.9 km
2007 RU17
Oct 29
40.6 LD
18
1.0 km
2003 UV11
Oct 30
5 LD
19
595 m
3838 Epona
Nov 7
76.8 LD
16
3.4 km
2005 QY151
Nov 16
77.7 LD
18
1.3 km
2008 KT
Nov 23
5.6 LD
28
10 m
2005 NZ6
Aug 14
60.5 LD
18
1.3 km
2002 CY46
Sep 2
63.8 LD
16
2.4 km
2010 LY63
Sep 7
56 LD
18
1.2 km
2009 SH2
Sep 30
7.1 LD
25
45 m
1998 UO1
Oct 1
32.1 LD
17
2.1 km
2005 GE59
Oct 1
77 LD
18
1.1 km
2001 WN5
Oct 10
41.8 LD
18
1.0 km
1999 VO6
Oct 14
34.3 LD
17
1.8 km
1998 TU3
Oct 17
69.1 LD
15
5.3 km
1998 MQ
Oct 23
77.7 LD
17
1.9 km
2007 RU17
Oct 29
40.6 LD
18
1.0 km
2003 UV11
Oct 30
5 LD
19
595 m
3838 Epona
Nov 7
76.8 LD
16
3.4 km
2005 QY151
Nov 16
77.7 LD
18
1.3 km
2008 KT
Nov 23
5.6 LD
28
10 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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