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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: 303.9 km/sec
density: 4.4 protons/cm3
explanation | more data
Updated: Today at 2345 UT
X-ray Solar Flares
6-hr max: B2
2330 UT Jul19
24-hr: B5
0750 UT Jul19
explanation | more data
Updated: Today at: 2340 UT
Daily Sun: 19 Jul 10
Sunspot 1087 is rapidly decaying. Credit: SOHO/MDI
Sunspot number: 12
What is the sunspot number?
Updated 18 July 2010

Spotless Days
Current Stretch: 0 days
2010 total: 35 days (17%)
2009 total: 260 days (71%)
Since 2004: 803 days
Typical Solar Min: 486 days
explanation | more info
Updated 18 July 2010


The Radio Sun
10.7 cm flux: 77 sfu
explanation | more data
Updated 18 July 2010

Current Auroral Oval:
Switch to: Europe, USA, New Zealand, Antarctica
Credit: NOAA/POES
Planetary K-index
Now: Kp= 1 quiet
24-hr max: Kp= 2
quiet
explanation | more data
Interplanetary Mag. Field
Btotal: 4.5 nT
Bz: 0.6 nT north
explanation | more data
Updated: Today at 2346 UT
Coronal Holes:
A solar wind stream flowing from the indicated coronal hole should reach Earth on July 22nd or 23rd. Credit: SDO/AIA
SPACE WEATHER
NOAA Forecasts
Updated at: 2010 Jul 19 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: 2010 Jul 19 2201 UTC
Mid-latitudes
0-24 hr
24-48 hr
ACTIVE
05 %
05 %
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
July 19, 2010

ANDROID FLYBYS: Our field-tested satellite tracker is now available for Android phones. Features: Global predictions and flyby alarms! Learn more.

 

NEW SUNSPOT: A new sunspot is emerging over the sun's southeastern limb, and it could be a big one. Click here and here for first-look images.

NOCTILUCENT CLOUDS: "An amazing display ... bright and beautiful ... like a dolphin playing in electric-blue waves..." These are a few of the things sky watchers are saying about the noctilucent clouds drifting over Europe. It's an ongoing display. If you live at high latitudes, in Europe or elsewhere, be alert for these mysterous clouds after dark.

FIERY TRANSIT: For a split second yesterday, the sunspot number sunspot increased .... by 6 astronauts and 815,520 lb of laboratories, habitats, and solar arrays. "It was a solar transit of the International Space Station," says Thierry Legault who photographed the event from Rambouillet, France:

"I used Calsky to predict the transit," he continues. "It was right on time." The ISS was moving fast; orbiting Earth at 17,000 mph, it crossed the face of the sun in only 0.5 seconds. He caught the passage using a digital video camera attached to a solar-filtered 6-inch telescope. And that's not all: "In addition to the ISS, there were several prominences, decaying sunspot 1087, and a new eruptive area coming into view over the sun's southeastern limb." Click here for the complete picture.

more images: from Jérôme Delpau of Le Mans, Sarthe, France

DOUBLE-LONG SOLAR ECLIPSE: For most observers, the South Pacific eclipse of July 11th lasted about four minutes--the time required for the Moon's shadow to sweep across any single point on Earth's surface. University of Arizona astronomer Glenn Schneider wasn't satisfied with such a short time, however, so he chartered a plane to chase the Moon's shadow. (continued below)


Above: a quick-look composite of images from Schneider's flight

"Flying at 39,000 feet along the path of totality, we managed to extend the eclipse to 9 minutes 23 seconds" says Schneider. The extra time allowed his team to take more and deeper images, revealing details of the sun's corona that ground-based expeditions might have missed. "We're analyzing the data now."

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

 
       
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 July 19, 2010 there were 1139 potentially hazardous asteroids.
July-Oct 2010 Earth-asteroid encounters:
Asteroid
Date(UT)
Miss Distance
Mag.
Size
1999 JD6
Jul 27
53.9 LD
17
1.8 km
6239 Minos
Aug 10
38.3 LD
18
1.1 km
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
55.9 LD
18
1.3 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
2.0 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
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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