Daily Archives: February 19, 2014

The Sun Online and solar activity. February 19, 2014

Numerous minor C-class flares in past 24h, mainly from NOAA ARs 1974 and 1982. This last AR produced the strongest one (C3.0) peaking at 02:01 UT, this region has potential for M-class flares. NOAA AR 1977 has decayed and did not produce any flare in past 24h. There were two partial halos CMEs
since yesterday. The first one starting at 23:48 UT on February 18 (LASCO-C2), related to a filament eruption, directed towards the northeast and will most likely not arrive to the Earth. The second one, first seen at 05:00 UT seems to be backsided but there’s not enough data yet to confirm.
A shock arrived to ACE at 03:10 UT. The speed jumped from 400km/s to 470km/s and the magnetic field intensity from 9nt to 18nT. The shock was driven by a magnetic cloud, probably related to a prominence eruption on February 16 (no clear CME was detected). Prior to the shock, Bz was pointing south during the evening of February 18. Due to the low temperatures present in this region, this southward field seems also to be part of a magnetic cloud, probably related to a faint eruption on February 14. This situation led to a geomagnetic storm with Kp reaching 6 between 03:00 UT and 09:00 UT. Geomagnetic conditions are expected to remain at mostly unsettled values today and quiet afterwards, until the expected arrival of the CME from February 18, late on February 20.

Equipment: Coronado 90 +  Imaging Source DMK  + LX75
Processing: Photoshop
Date: 02/19/14
Time UT: 16:00
Exposure 1/500 sec.

With SPONLI Space is getting closer


A Rainbow Pileus Cloud over Zimbabwe


Image Credit & Copyright: Peter Lowenstein

 Yes, but how many dark clouds have a multicolored lining? Pictured, behind this darker cloud, is a pileus iridescent cloud, a group of water droplets that have a uniformly similar size and so together diffractdifferent colors of sunlight by different amounts. The above image was taken just before sunset when it was noticed by chance by a photographer in Murambi East, near Odzi Valley and the Mtanda Range of Zimbabwe. Also captured were unusual cloud ripples above the pileus cloud. The formation of a rare pileus cloud capping a common cumulus cloud is an indication that the lower cloud is expanding upward and might well develop into a storm. In this case, however, only a few minutes after the colorful cloud was noticed, it disappeared.

NASA APOD 19-feb-2014

Reflection nebula VdB 152 in Cepheus

Described as a “dusty curtain” or “ghostly apparition”, mysterious reflection nebula VdB 152 really is very faint. Far from your neighborhood on this Halloween Night, the cosmic phantom is nearly 1,400 light-years away. Also catalogued as Ced 201, it lies along the northern Milky Way in the royal constellation Cepheus. Near the edge of a large molecular cloud, pockets of interstellar dust in the region block light from background stars or scatter light from the embedded bright star giving parts of the nebula a characteristic blue color.

Imaging telescopes or lenses: Planewave Instruments Planewave 12.5″ CDK
Imaging cameras: QSI 583wgs 8 filter wheel
Mounts: Software Bisque Paramount ME
Guiding telescopes or lenses: Planewave Instruments Planewave 12.5″ CDK
Guiding cameras: Starlight Xpress Lodestar
Software: Adobe Paint Shop cs6, Pleiades Astrophoto, S.L. PixInsight 1.8
Filters: Astrodon LRGB
Dates: Aug. 8, 2013
Locations: Nerpio
Frames: 112×1200″
Integration: 37.3 hours

Autor: Julian Hancock

AstroPhotography of the day by SPONLI

19 February 2014

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