Daily Archives: December 4, 2014

Sun online and solar activity 03.12.2014

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INFO FROM SIDC – RWC BELGIUM 2014 Dec 03 12:02:30 Solar activity continues to be at the level of a low C-class flaring. The strongest reported flare in last 24 hours was a C6.5 flare (peaked at 15:55 UT) on November 2, which originated from the Catania Sunspot group 24 (NOAA AR 2222). Similarly to majority of flares originating from this active region, the C6.5 flare seem to be a confined flare i.e. without an associated CME (currently available data give no indication about possible on disc signatures of the CME). No Earth directed CMEs were observed during last 24 hours. The solar wind speed reached its maximum value, of about 650 km/s, in the morning of November 2, and it was slowly decreasing afterwards. Earth is currently inside a slow solar wind with the speed of about 430 km/s. The interplanetary magnetic field magnitude is presently about 8nT. Short intervals of the negative value of the Bz component of the interplanetary magnetic field (down to -8nT) in the evening of November 2 and early morning of November 3 resulted in the unsettled to active geomagnetic conditions (local stations Dourbes and IZMIRAN reported K=4, and NOAA reported Kp=3). The large polar coronal hole with the extent to the low latitudes (up to about S40) will be the source of the fast solar wind which might be expected at the Earth in the morning of December 6. We expect currently quiet to unsettled geomagnetic conditions to continue in the next 24 hours.

Crescent Tricolour Start

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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. 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 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 telescope / lens: Borg ED 101
Mount: AstroPhysics AP1200 AP1200GTO
Guide telescope / lens: Borg ED 101
Camera guide: QSI 683WSG-8 OAG QSI 683
Focal reducers: Borg Super reducer f / 4
Software: Pixinsight 1.8, Photoshop CS 6 Photoshop CS6
Filters: Astrodon OIII 5nm, Astrodon SII 5nm, Astrodon Ha 5nm
Accessories: Starlight Xpress lodestar Lodestar
Resolution: 3172×2287
Dates: November 23, 2014
frames:
Astrodon Ha 5nm: 4×1800 “-20C bin 1×1
Astrodon OIII 5nm: 4×1800 “bin 1×1
Astrodon SII 5nm: 2×1800 “-20C bin 1×1
Accumulation: 5.0 hours
Avg. Age of the Moon: 0.49 days
Avg. Phase of the Moon: 0.27%
Location: Home Observatory, Home, Worcestershire, United Kingdom

Author: Paddy

Astrophotography of the day by SPONLI 04.12.2014