Daily Archives: April 21, 2014

The Sun Online and solar activity. April 21, 2014

There are currently 9 sunspot regions on the visible disk. Most are stable, with only NOAA 2034, 2035 and 2036 having a more complex beta-gamma structure. These three groups produced 7 of the 9 low-level C-class flares that were observed during the last 24 hours. Dynamic but small active regions NOAA 2038 and 2045 produced the two other C flares. Several CMEs were observed near and behind the northwest limb, related to continuing activity near NOAA 2032/2033. None of these CMEs had an earth-directed
component.   Further C-class flaring is expected, with a small chance on an isolated M-flare.
Active to minor storm conditions were observed in response to the ICME related to the M7 flare. Solar wind speed gradually declined from 700 to 600km/s, with Bz varying mostly between +11 and -7nT.
Geomagnetic conditions are expected to be quiet with an occasional active period as the geomagnetic field recovers from the ICME impact.

Equipment: Coronado 90 +  Imaging Source DMK  + LX75
Processing: Photoshop, Avistack 300 frames
Date: 04/21/14
Time UT: 15:00
Exposure 1/500 sec.

With SPONLI Space is getting closer


Massive Nearby Spiral Galaxy NGC 2841 

Image Credit: Hubble, Subaru; Composition & Copyright: Robert Gendler

It is one of the more massive galaxies known. A mere 46 million light-years distant, spiral galaxy NGC 2841 can be found in the northern constellation of Ursa Major. This sharp view of the gorgeous island universe shows off a striking yellow nucleus and galactic disk. Dust lanes, small, pink star-forming regions, and young blue star clusters are embedded in the patchy, tightly wound spiral arms. In contrast, many other spirals exhibit grand, sweeping arms with large star-forming regions. NGC 2841 has a diameter of over 150,000 light-years, even larger than our own Milky Way and captured by this composite image merging exposures from the orbiting 2.4-meter Hubble Space Telescope and the ground-based 8.2-meter Subaru Telescope. X-ray images suggest that resulting winds and stellar explosions create plumes of hot gas extending into a halo around NGC 2841.

APOD NASA 21-Apr-2014

NGC 6231: Northern Jewel Box

NGC 6231
, also known as the Northern Jewel Box, is an open cluster located near Zeta Scorpii. This cluster is estimated about 3.2 million years old, and is approaching the Solar System at 22 km/s. The cluster belongs to the young Scorpius OB1 association. Zeta1 Scorpii (spectral type O8 and magnitude 4.71.) is the brightest star in the association, and one of the most radiant stars known in the galaxy.

Imaging telescopes or lenses: Astro-Physics 152mm f/7.5 Starfire EDF
Imaging cameras: FLI ProLine Proline 16803
Mounts: Software Bisque Paramount MX
Guiding telescopes or lenses: Takahashi FS-60C
Guiding cameras: Starlight Xpress Superstar
Focal reducers: Astro-Physics AP 4.0″ Field Flattener
Software: PixInsight 1.8, Software Bisque TheSky6 Professional, FocusMax, Cyanogen Maxim DL Pro 5, Photoshop CS Photo Shop CS5, CCD Autopilot 5
Filters: Astrodon E-series LRGB Ha 5nm
Accessories: Sirius Dome
Dates: April 17, 2014
Frames: 27×1200″
Integration: 9.0 hours

Author: David Nguyen

AstroPhotography of the day by SPONLI
21 April 2014