Daily Archives: August 2, 2014

The Sun Online and solar activity. August 2, 2014

There are currently 9 sunspot regions on the solar disk. NOAA 2130 produced an M2 flare peaking at 14:48UT, and NOAA 2127 was the source of an M1.5 flare peaking at 18:13UT. The CME associated to this flaring activity was first observed by SOHO/LASCO at 18:36UT. This CME had a true speed of about 800 km/s, but the bulk was directed to the SE. Nonetheless, difference imagery detected the outline of a faint halo to the WSW, and was a near full halo as seen from the STEREO-A vantage point. Hence, a glancing blow of this CME can not be excluded and could impact Earth in the afternoon of 4 August.  NOAA 2127, 2130 and 2132 still have areas with some mixed magnetic polarity.  The CME associated to the 1 August (10:15UT) filament eruption, which took place in the same location as the 30 July filament eruption, was directed mainly to the north. It does not seem to have an Earth-directed component despite its proximity to the disk’s center.  Two 25-degrees long filaments in the NE and SW quadrant remained stable. C-class flaring is expected, with a chance for an M-class flare.
Solar wind speed increased from about 350 km/s to values between 400-450 km/s. Bz oscillated between -10 and +10 nT. Local geomagnetic conditions were quiet to unsettled, with Kp briefly reaching active levels just before midnight. No obvious signature from the CME associated to the 30 July filament eruption has been observed so far in the solar wind parameters. 
Geomagnetic conditions are expected to be quiet to unsettled, with locally a chance on active conditions as the solar wind may still be modulated by the 30 July CME (2 August) and the influence of a coronal hole stream (4 August).
SIDC

Equipment: Coronado 90 +  Imaging Source DMK  + LX75
Processing: Photoshop, Avistack 300 frames
Date: 08/02/14
Time UT: 16:00
Exposure 1/500 sec.

Observatory Sponli

  

NGC 7023: The Iris Nebula 

NGC7023Walker
Image Credit & Copyright: Jimmy Walker

 These clouds of interstellar dust and gas have blossomed 1,300 light-years away in the fertile star fields of the constellation Cepheus. Sometimes called the Iris Nebula, NGC 7023 is not the only nebula in the sky to evoke the imagery of flowers, though. Still, this deep telescopic view shows off the Iris Nebula’s range of colors and symmetries in impressive detail. Within the Iris, dusty nebular material surrounds a hot, young star. The dominant color of the brighter reflection nebula is blue, characteristic of dust grains reflecting starlight. Central filaments of the dusty clouds glow with a faint reddish photoluminesence as some dust grains effectively convert the star’s invisible ultraviolet radiation to visible red light. Infrared observations indicate that this nebula may contain complex carbon molecules known as PAHs. The pretty blue petals of the Iris Nebula span about six light-years.

APOD NASA 02-Aug-2014

M8 and M20

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The Lagoon (down) and Trifid (up) nebulae are two very famous nebulae in Sagittarius, and both nebulae can be glimpsed with the naked eye (from a dark site), and they are easy to see with binoculars.

Imaging telescopes or lenses: Skywatcher 80/400 ESPRIT Triplet-APO
Imaging cameras: Atik 383L+
Mounts: Skywatcher EQ8
Guiding telescopes or lenses: Skywatcher 80/400 ESPRIT Triplet-APO
Guiding cameras: Starlight Xpress Loadstar
Focal reducers: Riccardi Reducer 0,75x
Software: Fitswork 4.44, Adobe Photoshop CS3 CS3
Filters: Baader Planetarium Ha 7nm 2″
Accessories: Starlight Xpress 5×2″ Filter Wheel
Dates: July 23, 2014
Frames: 11×720″
Integration: 2.2 hours

Author: Alexander Sielski
AstroPhotography of the day by SPONLI 2 Aug 2014