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SpaceWeather.com -- News and information about meteor showers, solar flares, auroras, and near-Earth asteroids
SPACE WEATHER
Current conditions
Solar wind
speed: 541.3 km/sec
density: 1.2 protons/cm3
explanation | more data
Updated: Today at 2244 UT
X-ray Solar Flares
6-hr max: A0
2245 UT Nov16
24-hr: A0
2245 UT Nov16
explanation | more data
Updated: Today at: 2245 UT
Daily Sun: 16 Nov 07
A new sunspot is rapidly emerging in the sun's northern hemisphere. Credit: SOHO/MDI
Sunspot number: 11
What is the sunspot number?
Updated 16 Nov 2007
Far side of the Sun:
This holographic image reveals no sunspots on the far side of the sun. Image credit: SOHO/MDI
Planetary K-index
Now: Kp= 1 quiet
24-hr max: Kp= 2
quiet
explanation | more data
Current Auroral Oval:

Switch to: Europe, USA, New Zealand, Antarctica
Credit: NOAA/POES
Updated: 2007 Nov 16 2146 UT
What is the auroral oval?
Interplanetary Mag. Field
Btotal: 4.1 nT
Bz: 4 nT south
explanation | more data
Updated: Today at 2246 UT
Coronal Holes:
Earth is inside a solar wind stream flowing from this coronal hole. Credit: Hinode X-ray Telescope
SPACE WEATHER
NOAA Forecasts
Updated at: 2007 Nov 16 2203 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: 2007 Nov 16 2203 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
15 %
15 %
MINOR
05 %
05 %
SEVERE
01 %
01 %

What's up in Space
November 16, 2007
Where's Saturn? Is that a UFO--or the ISS? What's the name of that star? Get the answers from mySKY--a fun new astronomy helper from Meade.

SUNSPOT ALERT: If you have a solar telescope, point it at the sun. A double-sunspot is emerging in the sun's northern hemisphere. The next 24 hours should be a time of rapid growth and change--worth watching!

LEONID METEORS: To people who witnessed the great meteor storms of 1998-2002, the word "Leonid" is synonymous with "spectacular." Alas, this year's display is going to be the opposite. The Leonid debris stream is criss-crossed by rich tendrils of comet dust, but Earth will miss the richest tendrils in 2007. Forecasters expect no more than about a dozen ordinary meteors per hour when the shower peaks before dawn on Sunday, Nov. 18th.

UPDATE: On Nov. 14th, Hiroyuki Iida of Japan photogtaphed four early Leonids over the Tateyama mountains, proving that even a few meteors may be worth waking up before dawn to see: animation.

SPACE STATION: Early this morning, the International Space Station (ISS) passed over the Netherlands where astrophotographer Ralf Vandebergh was waiting with his camera and a 10-inch telescope. He took these pictures:

"My images show the station's new Harmony node and the just-unfurled P6 solar array," points out Vandebergh.

Harmony was delivered to the ISS earlier this month by space shuttle Discovery and moved into its current location just two days ago by astronauts using the station's robotic arm to wrestle the 30,000-lb module into place. Future shuttles will use Harmony as a docking port. Also, two new science labs (Kibo and Columbus) are scheduled to be attached to Harmony later this year and next, further expanding the ISS and making it an even better target for astrophotography.

The ISS is a beautiful sight through backyard telescopes and by naked eye. Would you like to know when the station is about to fly over your backyard? Sign up for Spaceweather PHONE.

GIANT COMET: "Formerly, the sun was the largest object in the Solar System," says University of Hawaii astronomer David Jewett. "Now, Comet 17P/Holmes holds that distinction." On Nov. 9th, a team of Hawaii astronomers led by Rachel Stevenson measured the diameter of the comet's expanding debris cloud: 1.4 million kilometers, slightly larger than the sun itself.


Click on the image for more information

This composite image prepared by Jewett shows a Nov. 9th photo of the comet beside the sun and Saturn for scale. To photograph the comet, Stevenson et al used the 3.6 meter Canada-France-Hawaii Telescope atop Mauna Kea, "one of the few professional instruments still capable of capturing the whole comet in one image," notes Jewett.

Comet Holmes exploded on Oct. 23th and it has been expanding ever since. How big will it get? See for yourself. The comet is visible to the naked eye as a fuzzball in the constellation Perseus. With only a backyard telescope you can see the comet's debris cloud in crisp detail and watch it expand from night to night. Nov. 19th is a good night to look: The comet will glide by the star Mirfak (alpha Persei) and appear to swallow it--a sight not to be missed: sky map, ephemeris.

Comet 17P/Holmes Photo Gallery
[Interactive World Map of Comet Photos]
[sky map] [ephemeris] [3D orbit] [Night Sky Cameras]

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 16, 2007 there were 901 potentially hazardous asteroids.
Nov. 2007 Earth-asteroid encounters:
Asteroid
Date(UT)
Miss Distance
Mag.
Size
2005 GL
Nov. 8
8.0 LD
16
280 m
2007 VA3
Nov. 11
7.0 LD
19
30 m
2007 UL12
Nov. 12
18.4 LD
17
325 m
1989 UR
Nov. 24
27.6 LD
15
880 m
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 bureau for real-time monitoring of solar and geophysical events, research in solar-terrestrial physics, and forecasting solar and geophysical disturbances.
Atmospheric Optics
  The first place to look for information about sundogs, pillars, rainbows and related phenomena.
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
  more links...
©2007, SpaceWeather.com -- This site is penned daily by Dr. Tony Phillips.
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