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SpaceWeather.com -- News and information about meteor showers, solar flares, auroras, and near-Earth asteroids
 
Solar wind
speed: 426.9 km/sec
density: 0.6 protons/cm3
explanation | more data
Updated: Today at 2345 UT
X-ray Solar Flares
6-hr max: B2
2052 UT Nov21
24-hr: B2
2052 UT Nov21
explanation | more data
Updated: Today at: 2300 UT
Daily Sun: 21 Nov 10
Solar activity is low. None of the spots on the Earth-facing side of the sun is an active source of flares. Credit: SDO/HMI. 2-day movie: 9 MB mpg
Sunspot number: 24
What is the sunspot number?
Updated 20 Nov 2010

Spotless Days
Current Stretch: 0 days
2010 total: 45 days (14%)
2009 total: 260 days (71%)
Since 2004: 813 days
Typical Solar Min: 486 days

Updated 20 Nov 2010


The Radio Sun
10.7 cm flux: 80 sfu
explanation | more data
Updated 20 Nov 2010

Current Auroral Oval:
Switch to: Europe, USA, New Zealand, Antarctica
Credit: NOAA/POES
Planetary K-index
Now: Kp= 0 quiet
24-hr max: Kp= 2
quiet
explanation | more data
Interplanetary Mag. Field
Btotal: 4.4 nT
Bz: 2.7 nT south
explanation | more data
Updated: Today at 2346 UT
Coronal Holes: 21 Nov 10
A minor solar wind stream flowing from the indicated coronal hole could reach Earth on Nov. 23rd or 24th. Credit: SDO/AIA.
SPACE WEATHER
NOAA Forecasts
Updated at: 2010 Nov 21 2200 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 Nov 21 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
10 %
10 %
MINOR
01 %
01 %
SEVERE
01 %
01 %
 
Sunday, Nov. 21, 2010
What's up in space
 

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

 

3D SUN: The Earth-facing side of the sun is quiet; strong solar flares and CMEs are unlikely this weekend. The far side of the sun, on the other hand, is dotted with active regions. If you have an iPhone or iPad, you see the sun's farside and monitor those active regions in real time. Download the 3D Sun.

OLD-FASHIONED BLUE MOON: According to modern folklore, a Blue Moon is the second full Moon in a calendar month. The next Blue Moon to fit this description will come on August 31, 2012. Do we really have to wait so long? There is an older definition that says the next Blue Moon is this weekend. To prepare for the event, Stefano De Rosa snapped this picture of the Moon waxing full over Turin, Italy:

The Moon is full on Nov. 21st. Usually there are only three full Moons in a season, but this Fall there will be four. The full Moon of Nov. 21st is the third of those four. According to old editions of the Maine Farmer’s Almanac, that makes it a Blue Moon. Confused? No wonder the modern definition is so much simpler.

"We have bad weather forecast for the 21st," says De Rosa, "so I took my old-fashioned Blue Moon photo on the 19th instead. It might not be truly blue, but the Moon looked great anyway rising alongside the Superga church while another wonder from the sky was joining the scene!"

Readers, be alert on Sunday night for a Blue Moon of your own.

more images: from Saied Bahrami Nejad of Kerman, Iran; from Guillaume Cannat of Prades-le-lez, France; from Tom Wagner of Waterloo, Iowa

LEONID RECAP: Earth is exiting a thicket of debris from Comet Tempel-Tuttle, source of the annual Leonid meteor shower. According to international counts, the shower crested on Nov. 17th and 18th with a peak rate of 20 meteors per hour. Compared to, say, the Leonid storms of a decade ago, it was not an impressive display--that is, unless you added it up for five nights in a row:

"These are all the Leonid fireballs I recorded from Nov. 13th to Nov. 18th," says Jim Gamble, who operates an all-sky camera in El Paso, Texas. "In total, there were 16 Leonids of magnitude -3 or brighter." Considering that Earth missed the densest part of the Leonid debris stream in 2010, more than a dozen fireballs is a good haul.

A bigger display is coming: In early December, Earth will enter a cloud of debris from extinct comet Phaethon, setting off the annual Geminid meteor shower. On peak night, Dec. 14th, forecasters expect as many as 100 meteors per hour, five times greater than the waning Leonids. Stay tuned!

more images: from Yuichi Takasaka of Gingolx (Kincolith), British Columbia, Canada; from Thomas Kerns of Homer, Alaska; from Yaron Eini of Jerusalem, Israel;


November 2010 Aurora Gallery
[previous Novembers: 2009, 2008, 2007, 2006, 2004, 2003, 2002, 2001, 2000]

  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 November 21, 2010 there were 1164 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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