You are viewing the page for Nov. 22, 2007
  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: 619.0 km/sec
density: 3.3 protons/cm3
explanation | more data
Updated: Today at 2135 UT
X-ray Solar Flares
6-hr max: A0
2135 UT Nov22
24-hr: A0
2135 UT Nov22
explanation | more data
Updated: Today at: 2245 UT
Daily Sun: 22 Nov 07
The sun is blank--no sunspots. Credit: SOHO/MDI
Sunspot number: 0
What is the sunspot number?
Updated 21 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= 4 unsettled
24-hr max: Kp= 4
unsettled
explanation | more data
Current Auroral Oval:

Switch to: Europe, USA, New Zealand, Antarctica
Credit: NOAA/POES
Updated: 2007 Nov 22 2118 UT
What is the auroral oval?
Interplanetary Mag. Field
Btotal: 7.6 nT
Bz: 1.2 nT south
explanation | more data
Updated: Today at 2137 UT
Coronal Holes:
Earth is inside a solar wind stream flowing from the indicated coronal hole. Credit: Hinode X-ray Telescope
SPACE WEATHER
NOAA Forecasts
Updated at: 2007 Nov 22 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 22 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
10 %
15 %
MINOR
01 %
05 %
SEVERE
01 %
01 %

What's up in Space
November 22, 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.

MARS DOUBLES IN BRIGHTNESS: During the past month, Mars has doubled in brightness and now it is putting on a nice show for backyard stargazers. A good night to look is Nov. 26th when Mars has an eye-catching close encounter with the Moon: full story.

COMET 17P/HOLMES: Exploding Comet Holmes is fading as it expands, and it is no longer easy to see with the naked eye, but it remains a good target for off-the-shelf digital cameras. A ~20 second exposure yields a print like this:

"After midnight the sky cleared up and the comet was an easy target in my suburban sky even without a telescope," says photographer Peter von Bagh of Porvoo, Finland.

Comet Holmes is now about as wide as a full Moon with a vast atmosphere that overlaps the bright star Mirfak. It's a beautiful ensemble for cameras and backyard telescopes alike. Take a look tonight after sunset: sky map.

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

MOON RINGS: This week, if you step outside after dark and look up, don't be surprised to find a ring around the Moon. Salvador Aguirre photographed this one last night over the town of Hermosillo, Mexico:


Photo details: Canon 400D, ASA 400, 20 seconds

Moon rings--the technical term is "22-degree ice halos"--are caused by ice crystals in high clouds, which bend moonbeams through their crystalline faces to form a luminous circle in the sky. This is a good week to look for them because the Moon is nearly full: bright Moons make bright rings. If you see a ring, be alert for moondogs and moon pillars, too. They're all caused by ice in the air.

more images: from Rob Kaufman of Bright, Australia.

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 22, 2007 there were 907 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.
©2019 Spaceweather.com. All rights reserved.