You are viewing the page for May. 11, 2008
  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: 326.0 km/sec
density: 0.7 protons/cm3
explanation | more data
Updated: Today at 2245 UT
X-ray Solar Flares
6-hr max: A1
1825 UT May11
24-hr: A1
1825 UT May11
explanation | more data
Updated: Today at: 2245 UT
Daily Sun: 11 May 08
The sun is blank--no sunspots. Credit: SOHO/MDI
Sunspot number: 0
What is the sunspot number?
Updated 11 May 2008
Far side of the Sun:
This holographic image reveals no sunspots on the farside 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: 2.8 nT
Bz: 2.0 nT north
explanation | more data
Updated: Today at 2246 UT
Coronal Holes:
There are no coronal holes on the Earth-facing side of the Sun. Credit: SOHO Extreme UV Telescope
SPACE WEATHER
NOAA Forecasts
Updated at: 2008 May 11 2203 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: 2008 May 11 2203 UTC
Mid-latitudes
0-24 hr
24-48 hr
ACTIVE
10 %
15 %
MINOR
05 %
05 %
SEVERE
01 %
01 %
High latitudes
0-24 hr
24-48 hr
ACTIVE
15 %
25 %
MINOR
05 %
10 %
SEVERE
01 %
05 %
What's up in Space
May 11, 2008
MOTHER'S DAY: Give your mom a truly heavenly gift on May 11th--a subscription to Space Weather PHONE!  

SPACE STATION TRICORDER: Astronauts are using a Star Trek tricorder-like device to keep track of microscopic life forms onboard the International Space Station. Get the full story from Science@NASA.

WHAT WOULD GALILEO SAY? Before you read any further, click here. That's what Galileo saw in 1610 when he turned his small telescope toward Jupiter: a fuzzy disk surrounded by four point-like moons. It wasn't much to look at, but his pioneering observations upended 17th century cosmology.

Fast forward 398 years to the backyard of amateur astronomer Paul Haese in Blackwood, South Australia: "I took this picture of Jupiter on May 10th using my peltier cooled 14-inch Celestron telescope."

"The seeing was great," he says. Jupiter's moon Io appears in the foreground not as a dimensionless point of light, but a true 3D orb. The Great Red Spot, a hurricane twice as wide as Earth, reveals its inner swirls while two companion red spots turn nearby: labels. The overall detail is simply breathtaking.

"I'm a happy camper, says Haese. "This is my best picture of Jupiter yet." And it didn't even upend cosmology. What would Galileo say?

Readers, Jupiter is a wonderful target for any backyard telescope and it's easy to find. Before dawn, look south for a bright light in the constellation Sagittarius: sky map.

more images: from Mike Salway of Central Coast, NSW Australia; from Christopher Go of Cebu City, Philippines;

SUN RIMS: "The Golden Gate Bridge is one of the sun's favorite toys," says photographer Mila Zinkova, who offers two examples from May 6th. "When the sun was setting behind the South Tower of the bridge, a sundog danced just above the North Tower: photo. But the show was not over yet. A few minutes later, the sun displayed its red and green rims for the bridge and me to enjoy."

Red and green rims are caused by refraction of light in Earth's atmosphere, especially the low atmosphere where air density gradients produce strong light-bending effects. Green light is bent more than red, producing the observed separation of colors: diagram.

Never seen such a thing? It's no wonder: Red and green rims are razor thin and they wrap around something blindingly bright. A good zoom lens and proper filters are required; the bridge is optional.


April 2008 Aurora Gallery
[Aurora Alerts] [Night-sky Cameras]

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. [comment]
On May 11, 2008 there were 952 potentially hazardous asteroids.
May 2008 Earth-asteroid encounters:
Asteroid
Date(UT)
Miss Distance
Mag.
Size
2008 HG
May 5
17 LD
18
90 m
2008 DE
May 9
17 LD
16
550 m
2008 HD2
May 9
6.5 LD
19
40 m
2008 HR3
May 11
3.1 LD
17
50 m
2008 HW1
May 14
72 LD
17
1.4 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 bureau for real-time monitoring of solar and geophysical events, research in solar-terrestrial physics, and forecasting solar and geophysical disturbances.
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.
Daily Sunspot Summaries
  From the NOAA Space Environment Center
Current Solar Images
  from the National Solar Data Analysis Center
  more links...
©2008, SpaceWeather.com -- This site is penned daily by Dr. Tony Phillips.
©2013 Spaceweather.com. All rights reserved.