Daily Archives: July 24, 2014

The Sun Online and solar activity. July 24, 2014

Solar activity has been mainly quiet with the background X-ray flux remaining between the B2 and B3  level. Catania sunspot group 22 (NOAA AR 2121) however did produce a C2.1 flare peaking at 1:51 UT. A chance for a further occasional C-flare from AR 2121 remains and also the probability for C-flares from Catania group 24 (NOAA AR 2123) has increased. With a reasonable full disc chance for C flares the all quiet alert status is therefore lifted, though at most an occasional low C level flare is likely.
No significant Earth directed CME’s were observed.  A transequatorial coronal hole crossed the central meridian around UT midnight July 23 to 24. It is likely to influence the solar wind conditions near Earth starting late July 26, early July 27.Solar wind speed was first stable in the beginning of the reporting period around 320 km/s and later picked up to enhanced values of around 380 km/s presently. The total
magnetic field also increased from being stable between 3-4nT just before the reporting period to fluctuating between 2nT and 7nT during the past 24 hours with Bz variable between +-5nT. Geomagnetic conditions were mostly quiet (NOAA Kp = 1-2 and local K Dourbes = 0-2) with a 6 hour period of
unsettled conditions before UT midnight (both NOAA Kp and local K Dourbes = 3). Slightly enhanced solar wind conditions and quiet to unsettled geomagnetic conditions are expected to continue under the influence of a coronal hole stream.

Equipment: Coronado 90 +  Imaging Source DMK  + LX75
Processing: Photoshop, Avistack 300 frames
Date: 07/24/14
Time UT: 16:00
Exposure 1/500 sec.

Observatory Sponli


ALMA Milky Way 


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

 This alluring all-skyscape was taken 5,100 meters above sea level, from the Chajnantor Plateau in the Chilean Andes. Viewed through the site’s rarefied atmosphere at about 50% sea level pressure, the gorgeous Milky Way stretches through the scene. Its cosmic rifts of dust, stars, and nebulae are joined by Venus, a brilliant morning star immersed in a strong band of predawn Zodiacal light. Still not completely dark even at this high altitude, the night sky’s greenish cast is due to airglow emission from oxygen atoms. Around the horizon the dish antenna units of the Atacama Large Millimeter/submillimeter Array, ALMA, explore the universe at wavelengths over 1,000 times longer than visible light.

APOD NASA 24-Julio-2014

M81: Bode’s Galaxy

7064dd99ec389fb4cb9de39a50d1b6cf.1824x0_q100_watermark_watermark_opacity-15_watermark_position-1_watermark_text-Copyright Michael Miller
Messier 81 (also known as NGC 3031 or Bode’s Galaxy) is a spiral galaxy about 12 million light-years away in the constellationUrsa Major. Due to its proximity to Earth, large size and active galactic nucleus (which harbors a 70 million M supermassive black hole), Messier 81 has been studied extensively by professional astronomers. The galaxy’s large size and relatively high brightness also make it a popular target for amateur astronomers.

Imaging telescopes or lenses: AG Optical 12.5 IDK
Imaging cameras: Apogee U16M
Mounts: Paramount MX
Software: photoshop, DC-3 Dreams ACP, PixInsight PixInsinght 1.8 RC7, Maxim DL
Filters: Astrodon H-alpha 5nm, Astrodon E-series LRGB
Dates: Jan. 30, 2014
Locations: New Mexico Skies
Frames: 36×600″
Integration: 6.0 hours

Author: Mike Miller
AstroPhotography of the day by SPONLI 24 July 2014

The Sun Online and solar activity. July 23, 2014

Solar activity has remained quiet with background X-ray flux close to the B2 level and an occasional moderate B flare (A B5.7 flare from Catania group 22 / NOAA AR 2121 peaking at 5:42 UT and a B5.5 flare from Catania group 20 / NOAA AR 2019 peaking at 7:42 UT). Without significant further development of the active regions presently on disc, quiet solar conditions are expected to continue, and the all quiet alert is maintained. A partial halo CME with an angular width of close to 180 degrees (underestimated by Cactus as 118 degrees) was visible in SOHO/LASCO C2 from 18:00UT July 22 onwards. The mass was expelled in north-western direction from the Sun Earth line. Coronal imagery (PROBA2/SWAP, SDO/AIA, as well as STEREO A EUVI) shows the event to originate from at or just around the western limb at a latitude of around 30 degrees North. Consequently no influence on Earth is expected.Solar wind speed has dropped gradually from its slightly enhanced values at the start of the reporting period (around 350 km/s) to just over 300 km/s presently. The total magnetic field was within the 3-5nT range with variable Bz within the +/-4nT range. Geomagnetic conditions were mostly quiet (NOAA Kp 1-2) with a short period of local unsettled conditions just after UT noon July 22 (K Dourbes 3 returning to 2 afterwards and 0-1 presently). Nominal solar wind conditions and associated quiet geomagnetic conditions are expected to continue over the next days.

Equipment: Coronado 90 +  Imaging Source DMK  + LX75
Processing: Photoshop, Avistack 300 frames
Date: 07/23/14
Time UT: 16:00
Exposure 1/500 sec.

Observatory Sponli