You are viewing the page for Jul. 12, 2007
  Select another date:
<<back forward>> -- News and information about meteor showers, solar flares, auroras, and near-Earth asteroids
Current conditions
Solar wind
speed: 485.8 km/sec
density: 0.8 protons/cm3
explanation | more data
Updated: Today at 2246 UT
X-ray Solar Flares
6-hr max: A4
1810 UT Jul12
24-hr: A4
1810 UT Jul12
explanation | more data
Updated: Today at: 2245 UT
Daily Sun: 12 July 07
Sunspot 963 is decaying and poses a diminishing threat for M-class solar flares. Credit: SOHO/MDI
Sunspot number: 28
What is the sunspot number?
Updated 10 July 2007
Far side of the Sun:
This holographic image reveals no large sunspots on the farside of the sun. Image credit: SOHO/MDI
Planetary K-index
Now: Kp= 2 quiet
24-hr max: Kp= 3
explanation | more data
Current Auroral Oval:
Switch to: Europe, USA, New Zealand, Antarctica
Updated: 2007 Jul 12 2139 UT
Interplanetary Mag. Field
Btotal: 2.8 nT
Bz: 0.1 nT north
explanation | more data
Updated:Today at 2246 UT
Coronal Holes:
A solar wind stream flowing from the indicated coronal hole should reach Earth on July 14th or 15th. Credit: SOHO Extreme Ultraviolet Telescope
NOAA Forecasts
Updated at: 2007 Jul 12 2203 UTC
0-24 hr
24-48 hr
01 %
01 %
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 Jul 12 2203 UTC
0-24 hr
24-48 hr
10 %
15 %
05 %
05 %
01 %
01 %
High latitudes
0-24 hr
24-48 hr
20 %
25 %
10 %
15 %
01 %
05 %
What's up in Space
July 12, 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.

GREAT PERSEIDS: The Perseid meteor shower is coming, and experts say it should be a great show. Get the full story from Science@NASA.

WINDOW SEAT: On July 11th, Doc Searls was taking a redeye flight from San Francisco to London when a solar wind stream hit Earth. High over northern Minnesota, he says, "I looked out the window and got the treat that I seek every day in SpaceWeather but tend to miss because I live in Santa Barbara." In short, the aurora borealis:

"The auroras seemed to be only yards away. I got out my Canon 30D and shot away, making liberal use of the dark blanket supplied by United Airlines. The plane, for what it's worth, was a Boeing 777 and my seat was 14a near the front of the wing."

Another solar wind stream is due July 14th. Air travelers, take your cameras and remember this: Seat 14a.

July 2007 Aurora Gallery
[Aurora Alerts] [Night-Sky Cameras]

NOCTILUCENT CLOUDS: The past few nights have produced some of the year's most intense noctilucent clouds over Europe. "In thirty years of observing NLCs, I have never seen such odd structures," reports John C McConnell of Maghaberry, Northern Ireland. "It was beautiful!" [photo]

At the Lidemark Observatory in Koege, Denmark, "we were drift-aligning our new LX200, when it started," says Frank R. Larsen who snapped this picture at daybreak on July 10th:

Photo details: Canon EOS 350D, EFS 18-55mm. ISO 1600, 1-2 sec exposures.

"The Moon was up and Mars was rising in the East," he says. "Beautiful electric-blue waves, the Moon and Mars and a few stars combined for an awesome view."

Lately, noctilucent clouds have been creeping south with displays over the continental USA on June 19th and July 3rd. Wherever you live, keep an eye on the western sky one to two hours after sunset. If you see electric-blue tendrils spreading up from the horizon, you've probably spotted an NLC.

2007 Noctilucent Cloud Gallery
[What are NLCs?] ["Noctilucent Cloud"--the song]

BONUS PHOTOS--Comet Linear VZ13: from Dalibor Hanžl of Brno, Czech Republic; from Paolo Candy of the Cimini Astronomical Observatory, Soriano, Italy; from Günther Strauch of Borken, NRW, Germany; from Vincent Jacques of Breil, France; from Stanescu Octavian of Silagiu, Romania; from Doug Zubenel of De Soto, Kansas.

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 July 12, 2007 there were 874 potentially hazardous asteroids.
July 2007 Earth-asteroid encounters:
Miss Distance
2007 FV42
July 2
53 LD
1.2 km
2007 MB4
July 4
7.6 LD
130 m
2007 DT103
July 29
9.3 LD
550 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 Environment 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, -- This site is penned daily by Dr. Tony Phillips.
©2019 All rights reserved.