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SpaceWeather.com -- News and information about meteor showers, solar flares, auroras, and near-Earth asteroids
 
Solar wind
speed: 477.6 km/sec
density: 1.8 protons/cm3
explanation | more data
Updated: Today at 2344 UT
X-ray Solar Flares
6-hr max: B1
2035 UT Oct27
24-hr: B7
1705 UT Oct27
explanation | more data
Updated: Today at: 2340 UT
Daily Sun: 27 Oct 10
Sunspot 1117 has a beta-gamma magnetic field that harbors energy for M-class solar flares. Credit: SOHO/MDI. 2-day movie: 8 MB mpg
Sunspot number: 74
What is the sunspot number?
Updated 26 Oct 2010

Spotless Days
Current Stretch: 0 days
2010 total: 45 days (15%)
2009 total: 260 days (71%)
Since 2004: 813 days
Typical Solar Min: 486 days

Updated 26 Oct 2010


The Radio Sun
10.7 cm flux: 86 sfu
explanation | more data
Updated 26 Oct 2010

Current Auroral Oval:
Switch to: Europe, USA, New Zealand, Antarctica
Credit: NOAA/POES
Planetary K-index
Now: Kp= 2 quiet
24-hr max: Kp= 2
quiet
explanation | more data
Interplanetary Mag. Field
Btotal: 3.1 nT
Bz: 2.0 nT north
explanation | more data
Updated: Today at 2346 UT
Coronal Holes: 27 Oct 10
There are no large coronal holes on the Earth-facing side of the sun. Credit: SDO/AIA.
SPACE WEATHER
NOAA Forecasts
Updated at: 2010 Oct 27 2200 UTC
FLARE
0-24 hr
24-48 hr
CLASS M
10 %
10 %
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 Oct 27 2200 UTC
Mid-latitudes
0-24 hr
24-48 hr
ACTIVE
10 %
15 %
MINOR
01 %
01 %
SEVERE
01 %
01 %
High latitudes
0-24 hr
24-48 hr
ACTIVE
10 %
20 %
MINOR
01 %
01 %
SEVERE
01 %
01 %
 
Wednesday, Oct. 27, 2010
What's up in space
 

ON SALE NOW: The David H. Levy Comet Hunter -- offering the clearest views of Comet Hartley 2.

 

POSSIBLE METEORS FROM COMET HARTLEY 2: A pair of unusual fireballs over Canada and the southeastern USA have experts wondering if Comet Hartley 2 might produce a meteor shower in early November. Get the full story from Science@NASA.

DEAD SPACECRAFT WALKING: Two NASA spacecraft that were supposed to be dead a year ago are instead flying to the Moon for a breakthrough mission in lunar orbit. The research they conduct could lead to important advances in space weather forecasting. For more information, read "Dead Spacecraft Walking" from Science@NASA.

BIG BRIGHT OBJECT NEAR THE SUN: Don't panic, it's just Venus. The brilliant evil twin of Earth is passing between our planet and the sun this week, making a bright UFO-like light in SOHO coronagraph images:

The bright rays and luminous bloom centered on the planet are digital artifacts. Venus is so bright, it saturates SOHO's CCD detectors, causing electrons to "bleed" across pixel boundaries. The same thing happens to a lesser degree with Mercury, which is bisected by a horizontal bar--another artifact. Note how the star Spica, dimmer than the planets, appears as a normal pinprick. It does not saturate the CCD.

Venus will continue its flamboyant passage for the next few days. Join SOHO for a ringside seat.

A BIG SUNSPOT GETS BIGGER: Behemoth sunspot 1117 is not merely growing, it is transmogrifying. Click on the image to launch a two-day movie from NASA's Solar Dynamics Observatory (8 MB):

Since yesterday, the shape-shifting sunspot has developed a "beta-gamma" magnetic field that harbors energy for M-class solar flares. Any such eruptions will likely be geoeffective because the sunspot is almost-squarely facing Earth. Readers with solar telescopes are encouraged to monitor developments.

more images: from Rogerio Marcon of CASLEO Observatory, San Juan, Argentina; from Patrick Bornet of Saint Martin sur Nohain, Nièvre, France; from David Arditti of Edgware, UK; from John Stetson of Portland, Maine


October 2010 Aurora Gallery
[previous Octobers: 2009, 2008, 2007, 2006, 2004, 2003, 2002, 2001]

  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 October 27, 2010 there were 1155 potentially hazardous asteroids.
Recent & Upcoming Earth-asteroid encounters:
Asteroid
Date(UT)
Miss Distance
Mag.
Size
2010 TQ19
Oct 8
9.6 LD
18
37 m
2010 TS19
Oct 10
3.7 LD
18
31 m
2010 TD54
Oct 12
0.1 LD
14
7 m
2010 TB54
Oct 13
6.1 LD
20
19 m
1999 VO6
Oct 14
34.3 LD
16
1.8 km
2010 TK
Oct 16
4.5 LD
18
37 m
1998 TU3
Oct 17
69.1 LD
13
5.2 km
2010 TG19
Oct 22
1.1 LD
15
70 m
1998 MQ
Oct 23
77.7 LD
15
1.9 km
2007 RU17
Oct 29
39.2 LD
15
1.1 km
2003 UV11
Oct 30
5 LD
12
595 m
3838 Epona
Nov 7
76.8 LD
14
3.4 km
2005 QY151
Nov 16
77.7 LD
17
1.3 km
2008 KT
Nov 23
5.6 LD
21
10 m
2002 EZ16
Nov 30
73.9 LD
16
1.0 km
2000 JH5
Dec 7
47 LD
-
1.5 km
2010 JL33
Dec 9
16.6 LD
13
1.3 km
2008 EA32
Jan 7
76.5 LD
-
2.1 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
Science Central
   
  more links...
 
 
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