RING OF FIRE SOLAR ECLIPSE--TODAY! On May 9-10, the Moon will pass directly in front of the sun over the South Pacific, producing a "ring of fire" solar eclipse. At greatest eclipse, more than 95% of the sun's surface will be covered. The Coca-Cola Space Science Center is hosting a live webcast of the event from Australia! Tune in on May 9th beginning at 5 pm EDT. More: animation, map,details.
MAGNETIC ACTIVITY: A ragged, dynamic filament of magnetism is dancing along the sun's southwestern limb today. It is so large, more than 250,000 km from end to end, that amateur astronomers are able to see it in great detail using backyard solar telescopes. John Stetson sends this snapshot from Falmouth, Maine:
The magnetic underpinnings of this arching prominence may be connected to nearby sunspot AR1736, which is itself unstable and poses a threat for M-class solar flares. If the anchor is unstable, the overlying structure could collapse. Observers with solar telescopes are encouraged to monitor the southwestern limb for developments.
speed: 451.5 km/sec
density: 3.4 protons/cm3explanation | more dataUpdated: Today at 0037 UT
6-hr max: C9 2316 UT May09
24-hr: C9 2316 UT May09
explanation | more dataUpdated: Today at: 2359 UT
|Near Earth Asteroids|
On May 10, 2013 there were 1397 potentially hazardous asteroids.
Recent & Upcoming Earth-asteroid encounters:
The GOES X-ray Flux plot contains 5 minute averages of solar X-ray output in the 1-8 Angstrom (0.1-0.8 nm) and 0.5-4.0 Angstrom (0.05-0.4 nm) passbands. Data from the SWPC Primary and Secondary GOES X-ray satellites are shown. Some data dropouts from the Primary satellite will occur during satellite eclipses.
source: http://www.swpc.noaa.gov/rt_plots/xray_5m.htmlSWPC X-ray alerts are issued at the M5 (5x10E-5 Watts/m2) and X1 (1x10E-4 Watts/m2) levels, based upon 1-minute data. Large X-ray bursts cause short wave fades for HF propagation paths through the sunlit hemisphere. Some large flares are accompanied by strong solar radio bursts that may interfere with satellite downlinks.
List Of The Potentially Hazardous Asteroids (PHAs)
Information on converting absolute magnitudes to diameters is available, as is an explanation of the quantities given in the listings below.