Daily Archives: February 5, 2014

The Sun Online and solar activity. February 5, 2014

Catania sunspot group 28 (NOAA AR 1967) stopped growing, and produced only one M-class flare in the past 24 hours (M1.5 flare peaking at 16:02 UT yesterday). Catania sunspot group 27 (NOAA AR 1968) produced only C-class flares, but exhibited the emergence of new magnetic flux and new sunspots this morning. These two groups keep respectively beta-gamma-delta and beta-gamma configurations of the photospheric magnetic field. We expect further flaring activity on the C- and M-level in these two groups, with an X-class flare being possible but unlikely. Due to the position of both sunspot groups still close to the solar central meridian (around 20-30 degrees from it), a CME associated with a flare in these active regions may arrive at the Earth. A major CME in one of these sunspot groups may lead to a proton event due to their position in the western hemisphere, so we maintain the warning condition. A weak partial halo CME first appeared in the SOHO/LASCO C2 field of view at 16:36 UT yesterday. It had the angular width of around 240 degrees and the plane-of-the-sky projected speed around 500 km/s. It was associated with the above-mentioned M1.5 flare in the Catania sunspot group 28 (NOAA AR 1967), a post-eruption arcade in its western part, and weak coronal dimmings. We expect at most the arrival of the CME-driven shock wave at the Earth, on February 8, most probably without strong geomagnetic  consequences (K = 4 at most). Another partial halo CME (first appearing in the LASCO C2 field of view
at 19:48 UT, angular width around 130 degrees) is a far side event (with the source region around S20W170 as seen from the Earth). A narrow coronal hole extended in latitude from the equator to approximately N60 reached the solar central meridian late yesterday evening. We expect the fast flow from this coronal hole to arrive at the Earth late on February 7 (see below). The Earth is currently inside a slow (around 350 km/s) solar wind flow with anomalously high (around 10 nT) interplanetary
magnetic field magnitude. The source of this high magnetic field is not clear at the moment. Due to the low solar wind speed, we expect quiet geomagnetic conditions. Late on February 7 we expect the arrival of the fast flow from the extended coronal hole (see above), resulting in active (K = 4) geomagnetic  conditions.

Equipment: Coronado 90 +  Imaging Source DMK  + LX75
Processing: Photoshop, Avistack 100 frames
Date: 02/05/14
Time UT: 18:00
Exposure 1/300 sec.

With SPONLI Space is getting closer!


NGC 2683: Edge-On Spiral Galaxy

Image Credit: Subaru Telescope (NAOJ), Hubble Space Telescope; Image Assembly, Processing, & Copyright: Robert Gendler
Explanation: Does spiral galaxy NGC 2683 have a bar across its center? Being so nearly like our own barred Milky Way Galaxy, one might guess it has. Being so nearly edge-on, however, it is hard to tell. Either way, this gorgeous island universe, cataloged as NGC 2683, lies a mere 20 million light-years distant in the northern constellation of the Cat (Lynx). NGC 2683 is seen nearly edge-on in this cosmic vista combining data and images from the ground-based Subaru telescope and the space-based Hubble Space Telescope. More distant galaxies are seen scattered in the background. Blended light from a large population of old yellowish stars forms the remarkably bright galactic core. Starlight silhouettes the dust lanes along winding spiral arms, dotted with the telltale blue glow of young star clusters in this galaxy’s star forming regions.
NASA APOD 05-Feb-2014

NGC 2170 reflection nebula in the constellation Monoceros

3abfe5749845e26aac05005179a63f20.1824x0_q100_watermark_watermark_opacity-10_watermark_position-6_watermark_text-Copyright Dean Salman, Sheri Loftin
Reflecting the light of nearby hot stars, NGC 2170 is joined by other bluish reflection nebulae, a compact red emission region, and streamers of obscuring dust against a backdrop of stars. Like the common household items still life painters often choose for their subjects, the clouds of gas, dust, and hot stars pictured here are also commonly found in this setting – a massive, star-forming molecular cloud in the constellation of the Unicorn (Monoceros).  The giant molecular cloud, Mon R2, is impressively close, estimated to be only 2,400 light-years or so away.

Imaging telescopes or lenses: Intes Micro MN84
Imaging cameras: QSI 583 wsg
Mounts: Astro-Physics 1200 GTO
Guiding cameras: Starlight Xpress Lodestar
Software: Adobe Photoshop CC, PixInsight
Dates: Nov. 9, 2013
Astrodon Luminance: 12×1200″
Astrodon RGB filter set: 60×900″

Autor: Dean Salman

AstroPhotography of the day by SPONLI

05 February 2014

We select the best works of amateur astrophotographers with details of equipment, shooting processing etc.