Daily Archives: July 27, 2014

The Sun Online and solar activity. July 27, 2014

Solar activity has been low with a couple of low level C flares from Catania group 24 (NOAA AR 2123), the strongest one peaking at 13:20 UT at C1.8 level and from NOAA AR 2125 (no Catania number) peaking at 5:51 UT at C2.5 level. Solar activity is expected to remain low over the next days with only a
slight chance for an M flare. A CME was seen departing the west limb (visible in SOHO/LASCO C2 from
around 15:12UT), but it is not Earth directed.After reaching a maximum of over 420 km/s at the start of the reporting period solar wind speed dropped to under 340 km/s and is currently back at around 370 km/s. Total magnetic field dropped from over 8nT to around 5nT with Bz variable within that magnitude but currently mainly positive around 3nT. Geomagnetic conditions have been quiet (NOAA Kp 1-2, local K Dourbes 0-3) with an isolated local unsettled period between 18 and 21 UT. Solar wind parameters are expected to remain nominal but to increase later due to the influence of a coronal hole high speed stream. Geomagnetic conditions are expected to be quiet first and later quiet to unsettled.
SIDC

Equipment: Coronado 90 +  Imaging Source DMK  + LX75
Processing: Photoshop, Avistack 300 frames
Date: 07/27/14
Time UT: 16:00
Exposure 1/500 sec.

Observatory Sponli

  

Rho Ophiuchi Wide Field 

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Image Credit & Copyright: Rogelio Bernal Andreo

The clouds surrounding the star system Rho Ophiuchi compose one of the closest star forming regions. Rho Ophiuchi itself is a binary star system visible in the light-colored region on the image right. The star system, located only 400 light years away, is distinguished by its colorful surroundings, which include a red emission nebula and numerous light and dark brown dust lanes. Near the upper right of the Rho Ophiuchi molecular cloud system is the yellow star Antares, while a distant but coincidently-superposed globular cluster of stars, M4, is visible between Antares and the red emission nebula. Near the image bottom lies IC 4592, the Blue Horsehead nebula. The blue glow that surrounds the Blue Horsehead’s eye — and other stars around the image — is a reflection nebula composed of fine dust. On the above image left is a geometrically angled reflection nebula cataloged as Sharpless 1. Here, the bright star near the dust vortex creates the light of surrounding reflection nebula. Although most of these features are visible through a small telescope pointed toward the constellations of Ophiuchus, Scorpius, and Sagittarius, the only way to see the intricate details of the dust swirls, as featured above, is to use a long exposure camera.

APOD NASA 27-Jul-2014

Dumbbell Nebula

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The Dumbbell Nebula (also known as Apple Core NebulaMessier 27M 27, or NGC 6853) is a planetary nebula in theconstellation Vulpecula, at a distance of about 1,360 light years.

This object was the first planetary nebula to be discovered; by Charles Messier in 1764. At its brightness of visual magnitude 7.5 and its diameter of about 8 arcminutes, it is easily visible in binoculars, and a popular observing target in amateur telescopes.

Imaging telescopes or lenses: GSO RC8
Imaging cameras: Canon EOS 450D / Digital Rebel XSi / Kiss X2
Mounts: Sky-Watcher NEQ6
Guiding telescopes or lenses: Sky-Watcher 80/400
Guiding cameras: lacerta mgen2
Focal reducers: Teleskop-Service TS 2″ Flattener
Software: photoshop, PixInsight, Iris
Dates: June 23, 2012
Frames: 18×300″
Integration: 1.5 hours

Author:  Philippe Mingasson
AstroPhotography of the day by SPONLI 27 July 2014