Daily Archives: September 11, 2014

The Sun Online and solar activity. September 11, 2014

The X1.6 flare from 10 September was associated with an asymmetric full halo coronal mass ejection (CME). It was first seen by SOHO/LASCO at 18:00UT and had an average plane-of-the-sky speed of about 800 km/s. The CME is expected to arrive at Earth on 12 September around 21:00UT (+/-12
hours). It is not expected to interact with a previous halo CME from 9 September. Major to severe geomagnetic storming is expected, pending the orientation of the magnetic field of the plasma cloud.
Starting around 21:00UT (10 September), a gradual increase in proton flux has been observed. It is currently above the event threshold near 30 pfu. This is only a minor radiation event with limited consequences for HF communication in the polar regions.  

Equipment: Coronado 90 +  Imaging Source DMK  + LX75
Processing: Photoshop, Avistack 300 frames
Date: 11/08/14
Time UT: 16:00
Exposure 1/500 sec.

Observatory Sponli


Zodiacal Light before Dawn 

beletsky_zodiacal_gmt beletsky_zodiacal_gmt900_labels
Image Credit & Copyright: Yuri Beletsky (Las Campanas Observatory, Carnegie Institution)

 You might not guess it, but sunrise was still hours away when this nightscape was taken, a view along the eastern horizon from a remote location in Chile’s Atacama desert. Stretching high into the otherwise dark, starry sky the unusually bright conical glow is sunlight though, scattered by dust along the solar system’s ecliptic plane . Known as Zodiacal light, the apparition is also nicknamed the “false dawn”. Near center, bright star Aldebaran and the Pleiades star cluster seem immersed in the Zodiacal light, with Orion toward the right edge of the frame. Reddish emission from NGC 1499, the California Nebula, can also be seen through the tinge of airglow along the horizon. Second image: the sky over this future site of the Giant Magellan Telescope at Las Campanas Observatory.
APOD NASA 11-Sep-14

California nebula


The California Nebula (NGC 1499) is an emission nebula located in the constellation Perseus. It is so named because it appears to resemble the outline of the US State of California on long exposure photographs. It is almost 2.5° long on the sky and, because of its very low surface brightness, it is extremely difficult to observe visually. It can be observed with a Hβ filter (isolates the Hβ line at 486 nm) in a rich-field telescope under dark skies. It lies at a distance of about 1,000 light years from Earth. Its fluorescence is due to excitation of the Hβ line in the nebula by the nearby prodigiously energetic O7 star, xi Persei (also known as Menkib.
The California Nebula was discovered by E. E. Barnard in 1884.

Imaging telescopes or lenses: Orion 80ED
Imaging cameras: Canon EOS 1000D / Rebel XS
Mounts: Orion Atlas EQ-G
Guiding cameras: Orion Star Shoot Planetary Imager & Autoguider
Focal reducers: Orion 0.85x Reducer/Corrector
Software: DeepSkyStacker, PHD guiding, photoshop, Canon EOS
Filters: Astronomik Ha
Dates: Dec. 29, 2011, Jan. 15, 2012
17×480″ ISO1600
Astronomik Ha: 11×720″ ISO1600
Integration: 4.5 hours

Author: Mike Carroll
AstroPhotography of the day by SPONLI 11 Sep 2014