Daily Archives: August 18, 2014

The Sun Online and solar activity. August 18, 2014

Solar activity was low with only an isolated C1.8 flare peaking at 19:48UT from NOAA AR 2146 while NOAA AR 2144 continued to produce a couple of moderate to high level B class flares. No Earth directed CME’s were recorded.
Solar activity is expected to remain low with only a slight chance for an M class flare.Solar wind speed remained around the 300 km/s level. The reporting period was marked by a couple of sector boundary crossings. After a short excursion in the negative sector at the start of the reporting period, the phi angle restored to a positive sector. It was later steadily negative between approximately 20:00 UT and 5:00 UT, but is now again positive. These sector boundary crossings were associated with some magnetic field variabilities. A negative Bz of up to -6nT just before the reporting period was associated with unsettled geomagnetic conditions after UT noon August 17 (both NOAA Kp and local K Dourbes 3).  Another local period of unsettled conditions was recorded around 9:00 UT (local K Dourbes 3). Nominal wind conditions, and corresponding quiet to unsettled geomagnetic conditions are expected to continue at first. But late August 19 some period of active conditions can be expected associated with the arrival of the August 15 CME.  

Equipment: Coronado 90 +  Imaging Source DMK  + LX75
Processing: Photoshop, Avistack 300 frames
Date: 08/18/14
Time UT: 16:00
Exposure 1/500 sec.

Observatory Sponli


Star Trails Over Indonesia 

Image Credit & Licence: HuiChieh (my dark sky)

Explanation: Both land and sky were restless. The unsettled land included erupting Mount Semeru in the distance, the caldera of steaming Mount Bromo on the left, flowing fog, and the lights of moving cars along roads that thread between hills and volcanoes in Bromo Tengger Semeru National Park in East Java, Indonesia. The stirring sky included stars circling the South Celestial Pole and a meteor streaking across the image right. Theabove 270-image composite was taken from King Kong Hill in mid-June over two hours, with a rising Moon lighting the landscape.

APOD NASA 18-Aug-14

Pelican Nebula

The Pelican Nebula (also known as IC 5070 and IC 5067) is an H II region associated with the North America Nebula in theconstellation Cygnus. The gaseous contortions of this emission nebula bear a resemblance to a pelican, giving rise to its name.The Pelican Nebula is located nearby first magnitude star Deneb, and is divided from its more prominent neighbour, the North America Nebula, by a molecular cloud filled with dark dust.

The Pelican is much studied because it has a particularly active mix of star formation and evolving gas clouds. The light from young energetic stars is slowly transforming cold gas to hot and causing an ionization front gradually to advance outward. Particularly dense filaments of cold gas are seen to still remain, and among these are found two jets emitted from the Herbig–Haro object 555. Millions of years from now this nebula might no longer be known as the Pelican, as the balance and placement of stars and gas will leave something that appears completely different.

Imaging telescopes or lenses: Takahashi TSA 102 f/8
Imaging cameras: Canon EOS 1000D / Rebel XS
Mounts: Takahashi EM-400 Temma2
Guiding telescopes or lenses: Lunatico EZG60
Guiding cameras: QHYCCD QHY5
Software: PHD guiding, PixInsight, Bahtinov Grabber
Filters: Astronomik CLS CCD clip in
Accessories: Xap Refrigeración Canon
Dates: May 27, 2012, July 9, 2012
Astronomik 12nm Hydrogen Alpha Filter: 18×900″ ISO1600 9C 
Astronomik CLS CCD clip in: 12×600″ ISO800 6C
Integration: 6.5 hours
Darks: ~20
Flats: ~20
Bias: ~20

Author: Alberto Pisabarro
AstroPhotography of the day by SPONLI 18 Aug 2014