You are viewing the page for Oct. 7, 2011
  Select another date:
<<back forward>>
SpaceWeather.com -- News and information about meteor showers, solar flares, auroras, and near-Earth asteroids
 
Solar wind
speed: 335.5 km/sec
density: 0.2 protons/cm3
explanation | more data
Updated: Today at 2342 UT
X-ray Solar Flares
6-hr max: C2
1857 UT Oct07
24-hr: C2
1857 UT Oct07
explanation | more data
Updated: Today at: 2300 UT
Daily Sun: 07 Oct 11
The six sunspot groups on the Earthside of the sun are relatively quiet and pose little threat for strong Earth-directed fares. Credit: SDO/HMI
Sunspot number: 99
What is the sunspot number?
Updated 06 Oct 2011

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

Updated 06 Oct 2011


The Radio Sun
10.7 cm flux: 124 sfu
explanation | more data
Updated 06 Oct 2011

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: 2.5 nT
Bz: 0.5 nT south
explanation | more data
Updated: Today at 2346 UT
Coronal Holes: 06 Oct 11
A solar wind stream flowing from the indicated coronal hole should reach Earth on Oct. 9th. Credit: SDO/AIA.
SPACE WEATHER
NOAA Forecasts
Updated at: 2011 Oct 07 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: 2011 Oct 07 2200 UTC
Mid-latitudes
0-24 hr
24-48 hr
ACTIVE
10 %
20 %
MINOR
01 %
10 %
SEVERE
01 %
01 %
High latitudes
0-24 hr
24-48 hr
ACTIVE
10 %
20 %
MINOR
01 %
10 %
SEVERE
01 %
01 %
 
Friday, Oct. 7, 2011
What's up in space
 

They came from outer space--and you can have one! Genuine meteorites are now on sale in the Space Weather Store.

 
Own your own meteorite

DRACONID METEOR OUTBURST: On October 8th, Earth will pass through a network of dusty filaments shed by Comet 21P/Giacobini-Zinner. Forecasters expect the encounter to produce anywhere from a few dozen to a thousand meteors per hour visible mainly over Europe, northern Africa and the Middle East. The meteors will stream from the northern constellation Draco--hence their name, the "Draconids."

Peak rates should occur between 1600 UT and 2200 UT (noon - 6 pm EDT) as Earth grazes a series of filaments nearly intersecting our planet's orbit. Analysts at the NASA Meteoroid Environment Office prepared this plot showing how the meteor rate is likely to vary:

If the maximum around 1900 UT reaches 1000 meteors per hour, the 2011 Draconids will be classified as a full-fledged meteor storm. The question is, will anyone see it? Bright moonlight over Europe, Africa and the Middle East will reduce the number of visible meteors 2- to 10-fold. The situation is even worse in North America where the shower occurs in broad daylight.

One way to enjoy the Draconids, no matter where you live, is to listen to them. The Air Force Space Surveillance Radar will be scanning the skies over the USA during the shower. When a Draconid passes through the radar beam--ping!--there will be an echo. Tune in to Space Weather Radio for live audio.

In Europe, an international team of scientists plans to observe the shower from airplanes flying at ~30,000 feet where the thin air reduces the impact of lunar glare. In Bishop, California, a team of high school students will launch an experimental helium balloon to higher altitudes, 100,000 feet or more, where the sky is black even at noon. Cameras in the balloon's payload might catch some Draconid fireballs during the peak hours of the outburst.

Stay tuned for updates as Earth approaches the debris zone.

Draconid resources:

TIANGONG-1 SIGHTINGS: China's first space station, an 8.5-ton experimental module named Tiangong-1 (Heavenly Palace-1), is flying over the United States this week. On Oct. 4th, photographer Tavi Greiner saw it gliding over Shallotte, North Carolina:

"The Tiangong 1 passed between Cygnus and Cassiopeia shortly after sunset," says Greiner. "It was surprisingly bright, easily seen with the unaided eye."

Readers, check Spaceweather's Satellite Tracker for sighting opportunities in your hometown. You can also turn your smartphone into a Tiangong-1 tracker by downloading the Simple Flybys app.

more images: from Jim Saueressig II of Burlington, Kansas; from Justin Cowart of Carbondale, Illinois; from Stuart McDaniel of Lawndale, North Carolina; from Giuseppe of Fisciano, Italy


September 2011 Aurora Gallery
[previous Septembers: 2010, 2009, 2008, 2007, 2006, 2005, 2004]

  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 7, 2011 there were 1250 potentially hazardous asteroids.
Recent & Upcoming Earth-asteroid encounters:
Asteroid
Date(UT)
Miss Distance
Mag.
Size
2011 TP
Oct 4
7.4 LD
--
22 m
2002 AG29
Oct 9
77.1 LD
--
1.0 km
2011 TB4
Oct 10
5.2 LD
--
35 m
2011 SE97
Oct 12
7.9 LD
--
50 m
2011 SS25
Oct 12
69.3 LD
--
1.0 km
2000 OJ8
Oct 13
49.8 LD
--
2.3 km
2009 TM8
Oct 17
0.9 LD
--
8 m
2011 FZ2
Nov 7
75.9 LD
--
1.6 km
2005 YU55
Nov 8
0.8 LD
--
175 m
1994 CK1
Nov 16
68.8 LD
--
1.5 km
1996 FG3
Nov 23
39.5 LD
--
1.1 km
2003 WM7
Dec 9
47.6 LD
--
1.5 km
1999 XP35
Dec 20
77.5 LD
--
1.0 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
 
Conquest Graphics
  for out-of-this-world printing and graphics
Trade Show Displays
   
  more links...
©2010 Spaceweather.com. All rights reserved. This site is penned daily by Dr. Tony Phillips.
©2013 Spaceweather.com. All rights reserved.