Daily Archives: October 10, 2014

Sun online and solar activity. 10.10.2014





During last 24 hours 3 M-class and 11 C-class flares were reported, all originating from the Catania sunspot group 67 (NOAA AR 2182) which has rather simple, beta configuration of its photospheric magnetic field. The strongest flare observed was the M1.4 flare which peaked at 01:58 UT this morning. The flare was associated with the coronal wave and possibly also CME (it will be confirmed once SOHO LASCO and STEREO coronagraph data become available). We expect flaring activity of the C-class and possibly also of the M-class level. Since the source of the recent flaring activity, Catania sunspot group 67 (NOAA AR 2182) is situated rather close to the west solar limb (about S16 W49), we issue warning conditions for a proton event. The solar wind speed is still rather low and it is fluctuating around 350 km/s. Due to the sector change, observed at about 05:30 UT on October 08, the interplanetary magnetic field magnitude is elevated and amounts about 10 nT. The  Bz component of the interplanetary magnetic field is fluctuating with rather long intervals of its negative value (lowest recorded value was about -8 nT). Due to the negative intervals of the Bz component of the interplanetary magnetic field we had unsettled to active geomagnetic conditions (K=4 reported by local station at Dourbes and Kp=4 reported by NOAA) during past 24 hours and we expect such geomagnetic conditions to continue in the coming hours.

Eagle Nebula, 10.10.2014


The Eagle Nebula (catalogued as Messier 16 or M16, and as NGC 6611, and also known as the Star Queen Nebula) is a young open cluster of stars in the constellation Serpens, discovered by Jean-Philippe de Cheseaux in 1745-46. Its name derives from its shape that is thought to resemble an eagle. It contains several active star-forming gas and dust regions, including the famous “Pillars of Creation”, photographed by the Hubble Space Telescope.

The Eagle Nebula is part of a diffuse emission nebula, or H II region, which is catalogued as IC 4703. This region of active current star formation is about 7000 light-years distant. The tower of gas that can be seen coming off the nebula is approximately 9.5 light-years or about 90 trillion kilometers long.

The brightest star in the nebula (HD 168076) has an apparent magnitude of +8.24, easily visible with good binoculars. It is actually a binary star formed of an O3.5V star plus an O7.5V companion.

The cluster associated with the nebula has approximately 460 stars, the brightest of spectral class O, a mass of roughly 80 solar masses, and a luminosity up to 1 million times that of the Sun. Its age has been estimated to be 1–2 million years.

The descriptive names reflect impressions of the shape of the central pillar rising from the southeast into the central luminous area. The name “Star Queen Nebula” was introduced by Robert Burnham, Jr., reflecting his characterization of the central pillar as the Star Queen shown in silhouette.

Imaging telescopes or lenses: Takahashi TSA120
Imaging cameras: sbig STT-8300M
Mounts: Sky-Watcher EQ6 Pro
Guiding cameras: sbig STT-8300M
Software: PixInsight, Lightroom
Filters: Baader Ha 7nm 1.25″, Baader OIII 8.5nm 1.25″, Baader SII 8nm 1.25″
Accessories: SBIG FW8G-STT, SBIG AO-8T
Resolution: 3110×2180
Locations: Work balcony
Baader Ha 7nm 1.25″: 10×1200″ -35C bin 1×1
Baader Ha 7nm 1.25″: 4×1800″ -35C bin 1×1
Baader OIII 8.5nm 1.25″: 2×1200″ -35C bin 1×1
Baader OIII 8.5nm 1.25″: 5×1800″ -35C bin 1×1
Baader SII 8nm 1.25″: 6×1200″ -35C bin 1×1
Baader SII 8nm 1.25″: 16×1800″ -35C bin 1×1
Integration: 18.5 hours
Darks: ~30
Bias: ~30
RA center: 274.700 degrees
DEC center: -13.885 degrees
Pixel scale: 1.235 arcsec/pixel
Orientation: 116.941 degrees
Field radius: 0.652 degrees

Автор: hughca, 10.10.2014

AstroPhotography of the day of SPONLI