You are viewing the page for Jul. 10, 2009
  Select another date:
<<back forward>>
SpaceWeather.com -- News and information about meteor showers, solar flares, auroras, and near-Earth asteroids
SPACE WEATHER
Current conditions
Solar wind
speed: 434.7 km/sec
density: 2.8 protons/cm3
explanation | more data
Updated: Today at 2346 UT
X-ray Solar Flares
6-hr max: A0
2340 UT Jul10
24-hr: A4
1040 UT Jul10
explanation | more data
Updated: Today at: 2340 UT
Daily Sun: 10 July 09
New-cycle sunspot 1024 is about to disappear over the sun's western limb. Credit: SOHO/MDI
Sunspot number: 15
What is the sunspot number?
Updated 09 July 2009

Spotless Days
Current Stretch: 0 days
2009 total: 142 days (75%)
Since 2004: 653 days
Typical Solar Min: 485 days
explanation | more info
Updated 09 July 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= 1 quiet
24-hr max: Kp= 3
quiet
explanation | more data
Current Auroral Oval:
Switch to: Europe, USA, New Zealand, Antarctica
Credit: NOAA/POES
Interplanetary Mag. Field
Btotal: 2.8 nT
Bz: 1.4 nT south
explanation | more data
Updated: Today at 2347 UT
Coronal Holes:
A solar wind stream flowing from the indicated coronal hole could reach Earth on July 12th or 13th. Credit: SOHO Extreme UV Telescope
SPACE WEATHER
NOAA Forecasts
Updated at: 2009 Jul 10 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 Jul 10 2201 UTC
Mid-latitudes
0-24 hr
24-48 hr
ACTIVE
15 %
05 %
MINOR
05 %
01 %
SEVERE
01 %
01 %
High latitudes
0-24 hr
24-48 hr
ACTIVE
25 %
15 %
MINOR
10 %
05 %
SEVERE
01 %
01 %
What's up in Space
July 10, 2009

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

 

GRAND CENTRAL SPACE STATION: On July 11th, space shuttle Endeavour will blast off from the Kennedy Space Center on a mission to the International Space Station (ISS). On July 12th, a Russian supply ship (Progress 33) will approach the ISS for docking tests. On July 13th, Endeavour itself will rendezvous with the ISS. Stay tuned to the Simple Satellite Tracker for a busy series of flybys.

GOOD-BYE SUNSPOT 1024: The biggest, most active sunspot in two years is about to disappear. Sunspot 1024 is approaching the sun's western limb and, later today, it will go around the bend. Pavol Rapavy sends this photo from Rimavska Sobota, Slovakia:

Readers with solar telescopes should train their optics on the edge of the sun. Even minor eruptions from sunspot 1024 could hurl photogenic blobs of hot plasma high over the limb where they would shine in beautiful relief against the black of space beyond. The parting shots could be the best of all.

more images: from Cai-Uso Wohler of Bispingen, Germany; from David B.V. Tyler of Buckinghamshire UK; from D. Booth, T. Emerson, J .Stetson of South Portland, Maine; from Andy Yeung of Hong Kong; from Stephen Yeathermon of Santa Fe, Texas;

BLUE MOON OVER IRAN: A severe dust storm so large that it is visible from space is blowing across Iran. Government officials have closed schools, cancelled flights, and warned the elderly and children to stay indoors. The only good thing about the storm is that it is turning the Moon a pleasing shade of blue:

Amir H. Abolfath took the picture from Tehran on July 7th. "I thought blue moons were a myth," he says, "but there it was."

Yes, blue moons are real. They appear when the air is filled with fine particles of dust (or other aerosols) about 1 micron in diameter. This is just the right size to make dusty air act as a blue color filter. Because the dust storm is so large, blue moons could be a regular fixture in the Persian sky for some nights to come.

more images: from Farzad Zamanfar of Tehran, Iran;


2009 Sarychev Sunset Gallery
[See also: 2008 Kasatochi Sunset Photo Gallery]


2009 Noctilucent Photo Gallery
[previous years: 2008, 2007, 2006, 2005, 2004, 2003]


Explore the Sunspot Cycle

       
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 10, 2009 there were 1065 potentially hazardous asteroids.
July 2009 Earth-asteroid encounters:
Asteroid
Date(UT)
Miss Distance
Mag.
Size
2009 MM8
July 13
11.4 LD
18
53 m
2008 NP3
July 18
11.8 LD
18
87 m
2006 TU7
July 20
14.2 LD
17
175 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...
   
©2008, SpaceWeather.com -- This site is penned daily by Dr. Tony Phillips.
©2019 Spaceweather.com. All rights reserved.