Daily Archives: September 14, 2014

The Sun Online and solar activity. September 14, 2014

There are currently 6 sunspot groups visible on the solar disk. Eight low-level C-class flares and one M-class flare were observed during the period. The latter reached a maximum of M1.5 at 02:16UT, and originated in NOAA 2157. The CME associated to this event was first observed by LASCO at 03:12UT. It had a speed of about 350 km/s (CACTus), but has no Earth-directed component. NOAA 2157 and NOAA 2158 continue their decay. However, together with NOAA 2164, they have spots of opposite magnetic polarity close to each other. Hence, they may still produce an M-class flare. Filament eruptions observed around 16:30UT (northeast quadrant) and 20:00UT (south of NOAA 2163) were not related to earth-directed CMEs.
M-class flares remain possible.  Solar wind speed decreased from about 600 km/s to 500 km/s, while Bz
decreased from +15 nT to a steady +6 nT. Geomagnetic conditions were quiet and are expected to remain so.

Equipment: Coronado 90 +  Imaging Source DMK  + LX75
Processing: Photoshop, Avistack 300 frames
Date: 14/08/14
Time UT: 16:00
Exposure 1/500 sec.

Observatory Sponli


M27: The Dumbbell Nebula

Image Credit & Copyright: Bill Snyder (Bill Snyder Photography)

 The first hint of what will become of our Sun was discovered inadvertently in 1764. At that time, Charles Messier was compiling a list of diffuse objects not to be confused with comets. The 27th object on Messier’s list, now known as M27 or the Dumbbell Nebula, is a planetary nebula, the type of nebula our Sun will produce when nuclear fusion stops in its core. M27 is one of the brightest planetary nebulae on the sky, and can be seen toward the constellation of the Fox (Vulpecula) with binoculars. It takes light about 1000 years to reach us from M27, shown above in colors emitted by hydrogen and oxygen. Understanding the physics and significance of M27 was well beyond 18th century science. Even today, many things remain mysterious about bipolar planetary nebula like M27, including the physical mechanism that expels a low-mass star’s gaseous outer-envelope, leaving an X-ray hot white dwarf.

APOD NASA 14-Sep-14

M31, Andromeda Galaxy

The Andromeda Galaxy  is a spiral galaxy approximately 2.5 million light-years (2.4×1019 km) from Earth in the Andromeda constellation. Also known as Messier 31, M31, or NGC 224, it is often referred to as the Great Andromeda Nebula in older texts. The Andromeda Galaxy is the nearest spiral galaxy to our Milky Way galaxy, but not the nearest galaxy overall. It gets its name from the area of the sky in which it appears, the constellation of Andromeda, which was named after the mythological princess Andromeda. The Andromeda Galaxy is the largest galaxy of the Local Group, which also contains the Milky Way, the Triangulum Galaxy, and about 30 other smaller galaxies.

Imaging telescopes or lenses: Takahashi TOA-130
Imaging cameras: SBIG STL-11000
Mounts: Losmandy G11
Guiding telescopes or lenses: Orion ShortTube 80 f/5
Guiding cameras: Orion Star Shoot Planetary Imager & Autoguider
Software: photoshop, Maxim DL
Filters: L, Astrodon Red, Astrodon G, Astrodon Filter: Blue, Astrodon h-Alpha

Author: Maurizio Cabibbo
AstroPhotography of the day by SPONLI 14 Sep 2014