Daily Archives: October 30, 2014

The Sun online and activity solar.30.10.2014



Seven M-class flares and six C-class flares were counted since the last bulletin. An M3.5 flare was the largest flare, peaking at 1:35 UT, originating from Catania sunspot group 88 (NOAA AR 2192). Catania group 88 is currently located at the west limb and although it is difficult to determine it’s characteristics, the region seems to have shrinked. All other regions on the front side of the solar disk were relatively stable. Catania group 88 is still capable to produce large flares, mainly at the M-level, with a minor chance for another X-flare. We retain the warning condition for a proton event. No Earth-directed CMEs were observed in coronagraphic imagery.The solar wind speed observed by ACE is low at around 350 km/s. The interplanetary magnetic field has a magnitude of about 5 nT. A sector boundary crossing is observed at about 08:00 UT on October 30 as the phi angle changed from a mostly positive to negative orientation. Mostly quiet geomagnetic conditions are expected, with a chance for an isolated time slot of active conditions (K=4).



Crescent Nebula


The Crescent Nebula (also known as NGC 6888, Caldwell 27, Sharpless 105) is an emission nebula in the constellation Cygnus, about 5000 light-years away. It was discovered by Friedrich Wilhelm Herschel in 1792.[2] It is formed by the fast stellar wind from the Wolf-Rayet star WR 136 (HD 192163) colliding with and energizing the slower moving wind ejected by the star when it became a red giant around 250,000[3] to 400,000 years ago. The result of the collision is a shell and two shock waves, one moving outward and one moving inward. The inward moving shock wave heats the stellar wind to X-ray-emitting temperatures.

Imaging telescopes or lenses: Borg 125ED
Imaging cameras: Canon 600D
Mounts: Celestron Advanced VX
Guiding telescopes or lenses: Borg Mini-50
Guiding cameras: SBIG SG-4
Software: Adobe Photoshop 6 CS, Stark Labs Nebulosity
Filters: Astronomik UHC, Baader Ha
Resolution: 2452×1589
Dates: Oct. 18, 2014, Oct. 19, 2014
Locations: Home
Baader Ha: 16×300″ ISO800 bin 1×1
Astronomik UHC: 28×180″ ISO800
Integration: 2.7 hours
Darks: ~50
Avg. Moon age: 24.55 days
Avg. Moon phase: 25.68%
Mean SQM: 18.41
Temperature: 18.00
RA center: 303.165 degrees
DEC center: 38.480 degrees
Orientation: -92.125 degrees
Field radius: 0.903 degrees

Автор: Chris Bernardi

Astrophotography of the day of  SPONLI, 30.10.2014

The Sun online and activity solar.29.10.2014

солнце 29 октября

Solar activity has slightly reduced in the past 24 hours, with three M-class and two C-class flares. Activity mainly originated from  Catania sunspot group 88 (NOAA AR 2192). A narrow CME was observed in SOHO/LASCO-C2 imagery (first measurement at October 28 20:24 UT), with a projected speed of 388 km/s (CACTus estimate). The CME is travelling to the northeast of the Sun-Earth line. The CME is believed to be associated with activity at the backside of the Sun and as such no effect on Earth is expected. Catania group 88 still has potential to produce strong flares up to the X-level. Due to it’s location close to the West limb, a strong eruption may result in a rise of the proton flux. Earth is currently inside a slow solar wind, with solar wind speed decreasing from 450 km/s to currently around 350 km/s. The interplanetary magnetic field has a magnitude of about 5 nT with fluctuating Bz values. Quiet geomagnetic conditions are observed and are expected to continue.