Daily Archives: April 23, 2014

The Sun Online and solar activity. April 23, 2014

Only 5 low-level C-class flares were recorded over the last 24 hours. Active regions NOAA 2038 (2), 2035 (1) and 2034 (2, from behind the west limb) were the sources. A CME first visible in LASCO/C2 at 15:12UT originated from a filament eruption in the northeast solar quadrant. Another CME, first visible in LASCO/C2 at 16:36UT, was related to a backside solar flare. None of these CMEs has an earth-directed component.
Further C-class flaring is expected. Solar wind speed has been varying between 400 and 450km/s, with Bz between -4 and +2nT. A small equatorial coronal hole will reach the central meridian tonight. The geomagnetic field may be impacted around 27 April. Geomagnetic conditions have been quiet, and are expected to remain so.

Equipment: Coronado 90 +  Imaging Source DMK  + LX75
Processing: Photoshop, Avistack 300 frames
Date: 04/23/14
Time UT: 17:00
Exposure 1/500 sec.

With SPONLI Space is getting closer


Arp 81: 100 Million Years Later 

Image Credit: Hubble Legacy Archive, ESA, NASA; Processing – Martin Pugh

From planet Earth, we see this strongly distorted pair of galaxies, cataloged as Arp 81, as they were only about 100 million years after their close encounter. The havoc wreaked by their mutual gravitational interaction during the encounter is detailed in this color composite image showing twisted streams of gas and dust, a chaos of massive star formation, and a tidal tail stretching for 200 thousand light-years or so as it sweeps behind the cosmic wreckage. Also known as NGC 6622 (left) and NGC 6621, the galaxies are roughly equal in size but are destined to merge into one large galaxy in the distant future, making repeated approaches until they finally coalesce. Located in the constellation Draco, the galaxies are 280 million light-years away. Even more distant background galaxies can be spotted in this sharp, reprocessed, image from Hubble Legacy Archive data.

NASA APOD 23-Apr-2014

The Cat’s Paw Nebula in Scorpius

At 5,500 light years distant, Cat’s Paw is an emission nebula with a red color that originates from an abundance of ionized hydrogen atoms. Alternatively known as the Bear Claw Nebula or NGC 6334, stars nearly ten times the mass of our Sun have been born there in only the past few million years.

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: March 18, 2014
Frames: 29×1200″
Integration: 9.7 hours

Author: David Nguyen

AstroPhotography of the day by SPONLI
23 April 2014

The Sun Online and solar activity. April 22, 2014

Eleven C-class flares were observed, with 6 produced by NOAA 2035 and the other 5 by NOAA 2038. NOAA 2035 produced the strongest flare at the end of the period (C8 peaking at 11:37UT). The strongest flare from NOAA 2038 was a C5 flare peaking at 20:02UT (21 April). Together with NOAA 2045, these
active regions have increased somewhat in sunspot area and magnetic complexity. The other sunspot regions are stable and/or rounding the west limb. Based on the currently available SOHO and STEREO coronagraphic imagery, no earth-directed CMEs have been observed.  Further C-class flaring is expected, with a chance on an isolated M-flare. Solar wind speed declined further from around 600 to 450km/s. Bz was mostly positive, with values up to +5nT. Geomagnetic conditions evolved from active to quiet.  Geomagnetic conditions are expected to remain mostly quiet.

Equipment: Coronado 90 +  Imaging Source DMK  + LX75
Processing: Photoshop, Avistack 300 frames
Date: 04/22/14
Time UT: 15:00
Exposure 1/500 sec.

With SPONLI Space is getting closer