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SpaceWeather.com -- News and information about meteor showers, solar flares, auroras, and near-Earth asteroids
 
Solar wind
speed: 301.0 km/sec
density: 0.6 protons/cm3
explanation | more data
Updated: Today at 2347 UT
X-ray Solar Flares
6-hr max: C2
2131 UT Sep10
24-hr: C3
1255 UT Sep10
explanation | more data
Updated: Today at: 2300 UT
Daily Sun: 10 Sep 12
Sunspot complex 1654-1658 has a beta-bamma magnetic field that harbors energy for M-class solar flares. Credit: SDO/HMI
Sunspot number: 87
What is the sunspot number?
Updated 10 Sep 2012

Spotless Days
Current Stretch: 0 days
2012 total: 0 days (0%)
2011 total: 2 days (<1%)
2010 total: 51 days (14%)
2009 total: 260 days (71%)
Since 2004: 821 days
Typical Solar Min: 486 days

Update 10 Sep 2012


The Radio Sun
10.7 cm flux: 123 sfu
explanation | more data
Updated 10 Sep 2012

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: 4.0 nT
Bz: 1.4 nT north
explanation | more data
Updated: Today at 2347 UT
Coronal Holes: 10 Sep 12
There are no large coronal holes on the Earthside of the sun. Credit: SDO/AIA.
SPACE WEATHER
NOAA Forecasts
Updated at: 2012 Sep 10 2200 UTC
FLARE
0-24 hr
24-48 hr
CLASS M
20 %
20 %
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: 2012 Sep 10 2200 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
20 %
15 %
MINOR
20 %
10 %
SEVERE
10 %
10 %
 
Monday, Sep. 10, 2012
What's up in space
 

Hang the Transit of Venus on your wall! Hubble-quality images from NASA's Solar Dynamics Observatory are now available as metallic posters in the Space Weather Store.

 
Venus Transit metal posters

DOUBLE ASTEROID FLYBY: A pair of big, near-Earth asteroids will fly by the Earth-Moon system on Sept. 14th. 2012 QG42 is a 300 meter space rock that comes from the vicinity of Mars; it will pass 2.8 million km (7.4 LD) from Earth. 2012 QC8 is even bigger, about 1.1 km in diameter, hailing from the orbit of Jupiter; it will pass about 8.7 million km (22.7 LD) from Earth. Astronomers monitoring the incoming space rocks say they are glowing like 14th-15th magnitude stars, which makes them good targets for advanced amateur telescopes. Ephemerides: 2012 QG42, 2012 QC8.

SOLAR CONJUNCTION OF MERCURY: An astronomical conjunction is underway this week--but don't bother looking up because it is hidden in broad daylight. Mercury is passing only a degree and a half from the sun. Using an opaque disk to block the sun's glare, the Solar and Heliospheric Observatory (SOHO) took this picture of the close encounter on Sept. 10th:

In the weeks ahead, Mercury will move away from the sun, emerging from the glare in mid-October to assume the role of Evening Star in the western sky at sunset. Until then, it takes a coronagraph to see the coming and goings of the innermost planet. Join SOHO for a ringside seat.

Realtime Space Weather Photo Gallery

SUBORBITAL CHICKEN: On Wednesday Sept. 5th a group of California high school students celebrated the 35th anniversary of the launch of Voyager 1 in an unusual way: They launched a rubber chicken. The popular NASA mascot Camilla traveled to the top of our planet's atmosphere on board a suborbital helium balloon. Here is a snapshot from an altitude of approximately 120,000 feet:

Camilla is wearing headphones. Why? Because she's listening to the Golden iPod, the modern-day successor to the Golden Records bolted to the side of the Voyager probes. The students are updating the Golden Records with 21st-century content that the students would like to send into the cosmos. This was just a test flight; in 2013, they hope to launch the Golden iPod into Earth orbit onboard a CubeSat they are building.

At the apex of the Sept. 5th suborbital flight, the helium balloon popped as planned and Camilla parachuted back to Earth. The students, who call their group "Earth to Sky," recovered Camilla and the Golden iPod from a remote landing site in the Nevada wilderness on Sept. 6th. Now they are all enjoying music that has been to the doorstep of space itself.

More information about the flight and the recovery expedition may be found at Earth to Sky's Facebook page. Students who wish to participate in the Golden iPod project can submit their ideas for the iPod's playlist at goldenipod.org.


Realtime Aurora Photo Gallery


Realtime Noctilucent Cloud Photo Gallery
[previous years: 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2011]

  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 September 10, 2012 there were potentially hazardous asteroids.
Recent & Upcoming Earth-asteroid encounters:
Asteroid
Date(UT)
Miss Distance
Mag.
Size
2012 QG42
Sep 14
7.4 LD
--
310 m
2012 QC8
Sep 14
22.7 LD
--
1.1 km
1998 UO1
Oct 4
60.1 LD
--
2.1 km
2005 GQ21
Oct 12
77 LD
--
1.0 km
1998 ST49
Oct 18
28.7 LD
--
1.3 km
1991 VE
Oct 26
34 LD
--
1.1 km
2001 CV26
Oct 30
68 LD
--
2.4 km
2007 PA8
Nov 5
16.8 LD
--
2.4 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 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
Trade Show Displays
   
  more links...
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