Daily Archives: August 7, 2014

The Sun Online and solar activity. August 7, 2014

The strongest flare in the past 24 hours was a C1.1 event that occurred today at 05:52 UT in NOAA AR 2130. NOAA ARs 2132 and 2134 are stable and have simplified. We expect more flaring at C-class level in the coming days. A filament eruption was observed near NOAA AR 2127 at 10:40 UT today.
No coronagraph images are currently available, but due to the location near the west limb a possible associated CME is not expected to be earth-directed.
Activity seems to be increasing in the active region complex formed by NOAA active regions 2127, 2128 and 2130. These regions are currently close to the west limb. In case of a strong eruption occurs there, a proton event is not excluded. Therefore we issue a warning condition. The solar wind has
returned to quiet conditions. Unsettled geomagnetic conditions (K up to 3) are possible later today or tomorrow in case a coronal hole high speed wind stream should arrive.

Equipment: Coronado 90 +  Imaging Source DMK  + LX75
Processing: Photoshop, Avistack 300 frames
Date: 08/07/14
Time UT: 16:00
Exposure 1/500 sec.

Observatory Sponli


Rosetta’s Rendezvous 


 On August 3rd, the Rosetta spacecraft’s narrow angle camera captured this stunning image of the nucleus of Comet 67P/Churyumov-Gerasimenko. After 10 years and 6.5 billion kilometers of travel along gravity assist trajectories looping through interplanetary space, Rosetta had approached to within 285 kilometers of its target. The curious double-lobed shape of the nucleus is revealed in amazing detail at an image resolution of 5.3 meters per pixel. About 4 kilometers across, the comet nucleus is presently just over 400 million kilometers from Earth, between the orbits of Jupiter and Mars. Now the first spacecraft to achieve a delicate orbit around a comet, Rosetta will swing to within 50 kilometers and closer in the coming weeks, identifiying candidate sites for landing its probe Philae later this year.

APOD NASA 07-Aug-14

M101: The Pinwheel Galaxy

5c9ccc79d799979a151212cf3ccb68bb.1824x0_q100_watermark_watermark_opacity-20_watermark_position-6_watermark_text-Copyright Giulio Ercolani

The Pinwheel Galaxy (also known as Messier 101M101 or NGC 5457) is a face-on spiral galaxy distanced 21 million light-years (six megaparsecs) away in the constellation Ursa Major, first discovered by Pierre Méchain on March 27, 1781, and communicated to Charles Messier who verified its position for inclusion in the Messier Catalogue as one of its final entries. On August 24, 2011, a Type Ia supernova, SN 2011fe, initially designated PTF 11kly, was discovered in M101. The supernova was visual magnitude17.2 at discovery and reached magnitude 9.9 at its peak. This was the fourth supernova recorded in M101. The first, SN 1909A, was discovered by Max Wolf in January 1909 and reached magnitude 12.1. SN 1951H reached magnitude 17.5 in September 1951 and SN 1970G reached magnitude 11.5 in January 1970.

Imaging telescopes or lenses: Planewave Instruments CDK 12.5″ Corrected Dall-Kirkham Astrograph f/8
Imaging cameras: SBIG STXL 6303
Mounts: Paramount PME
Filters: Astrodon Ha, Astrodon Blue, Astrodon Green, Astrodon Red, Astrodon Luminance
Dates: June 15, 2014, June 18, 2014, July 3, 2014
Astrodon Blue: 11×300″ bin 2×2
Astrodon Green: 7×300″ bin 2×2
Astrodon Ha: 5×600″ bin 1×1
Astrodon Luminance: 9×300″ bin 1×1
Astrodon Red: 9×300″ bin 2×2
Integration: 3.8 hours

Author: Giulio Ercolani
AstroPhotography of the day by SPONLI 7 Aug 2014