You are viewing the page for Aug. 28, 2010
  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: 542.2 km/sec
density: 0.1 protons/cm3
explanation | more data
Updated: Today at 2347 UT
X-ray Solar Flares
6-hr max: A7
2110 UT Aug28
24-hr: A9
0050 UT Aug28
explanation | more data
Updated: Today at: 2340 UT
Daily Sun: 28 Aug 10
Sunspot 1101 is big but quiet. Overall, solar activity is very low.
Resolutions: 4096, 1024, 512
Sunspot number: 11
What is the sunspot number?
Updated 26 Aug 2010

Spotless Days
Current Stretch: 0 days
2010 total: 39 days (16%)
2009 total: 260 days (71%)
Since 2004: 807 days
Typical Solar Min: 486 days
explanation | more info
Updated 26 Aug 2010


The Radio Sun
10.7 cm flux: 73 sfu
explanation | more data
Updated 26 Aug2010

Current Auroral Oval:
Switch to: Europe, USA, New Zealand, Antarctica
Credit: NOAA/POES
Planetary K-index
Now: Kp= 1 quiet
24-hr max: Kp= 3
quiet
explanation | more data
Interplanetary Mag. Field
Btotal: 1.9 nT
Bz: 0.7 nT south
explanation | more data
Updated: Today at 2347 UT
Coronal Holes:
Earth is inside a solar wind stream flowing from the indicated coronal hole. Credit: SDO/AIA
SPACE WEATHER
NOAA Forecasts
Updated at: 2010 Aug 28 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: 2010 Aug 28 2201 UTC
Mid-latitudes
0-24 hr
24-48 hr
ACTIVE
10 %
10 %
MINOR
05 %
05 %
SEVERE
01 %
01 %
High latitudes
0-24 hr
24-48 hr
ACTIVE
20 %
20 %
MINOR
05 %
05 %
SEVERE
01 %
01 %
What's up in Space
August 28, 2010

AURORA ALERTS: Did you miss the Northern Lights? Next time get a wake-up call from Space Weather PHONE

 

MUST-SEE ASTEROID VIDEO: Astronomer and programmer Scott Manley, formerly of the Armagh Observatory in Northern Ireland, has created a movie showing 30 years of asteroid discoveries in only 3 minutes. Warning: Feelings of claustrophobia have been reported among some viewers. It's crowded out there! Click to play.

SPLASHES OF GREEN: For the third day in a row, a high-speed solar wiind stream is buffeting Earth's magnetic field, energizing bright auroras around the Arctic Circle. "There was quite a heavy outburst last night (Aug. 27)," reports Bernt Olsen from Kvaløya, Norway. "Even though the arctic nights still are bright, we could still see splashes of green in the sky."

NOAA forecasters estimate a 30% chance of geoomagnetic activity during the next 24 hours as the solar wind continues to blow. High-latitude sky watchers should remain alert for auroras.

August 2010 Northern Lights Gallery
[previous Augusts: 2009, 2008, 2007, 2006, 2005, 2004, 2003]

FIRST LIGHT FROM THE NEW SOLAR TELESCOPE: Before you read another word, click on the image and take a close look at sunspot 1084:

This is a first light adaptive optics image from the New Solar Telescope (NST) at the Big Bear Solar Observatory in California. "With a 1.6-meter primary mirror, the NST is the largest solar telescope in the world," says Nicolas Gorceix of the observatory staff. "It has realtime correction for atmospheric distortion (adaptive optics), so we can see things in very high resolution--as small as 65 km wide on the sun."

"For perspective," he adds, "Earth is slightly smaller than the whole sunspot including the dark umbra and the daisy petal-like penumbra. The spot is surrounded by the sun's ubiquitous granular field [which shows the boiling motions of the sun's surface]."

Researchers believe that high-resolution studies of sunspots can help them understand how sunspots evolve and anticipate when they're about to erupt. "Next year, we plan to upgrade the telescope with a much higher-order adaptive optics system to get even better images," says Gorceix. Stay tuned to the BBSO home page for updates.


2010 Perseid Photo Gallery
[meteor radar] [meteor alerts]

 
       
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 August 28, 2010 there were 1144 potentially hazardous asteroids.
Recent & Upcoming Earth-asteroid encounters:
Asteroid
Date(UT)
Miss Distance
Mag.
Size
2002 CY46
Sep 2
63.8 LD
16
2.4 km
2010 LY63
Sep 7
56 LD
18
1.2 km
2009 SH2
Sep 30
7.1 LD
25
45 m
1998 UO1
Oct 1
32.1 LD
17
2.1 km
2005 GE59
Oct 1
77 LD
18
1.1 km
2001 WN5
Oct 10
41.8 LD
18
1.0 km
1999 VO6
Oct 14
34.3 LD
17
1.8 km
1998 TU3
Oct 17
69.1 LD
15
5.3 km
1998 MQ
Oct 23
77.7 LD
17
1.9 km
2007 RU17
Oct 29
40.6 LD
18
1.0 km
2003 UV11
Oct 30
5 LD
19
595 m
3838 Epona
Nov 7
76.8 LD
16
3.4 km
2005 QY151
Nov 16
77.7 LD
18
1.3 km
2008 KT
Nov 23
5.6 LD
28
10 m
2002 EZ16
Nov 30
73.9 LD
18
1.0 km
2000 JH5
Dec 7
47 LD
17
1.5 km
2010 JL33
Dec 9
16.6 LD
18
1.3 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 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
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.

 

 

 

 

 

 

 

 

 

 

 

 

©2013 Spaceweather.com. All rights reserved.