Daily Archives: April 6, 2014

The Sun Online and solar activity. Abril 6, 2014

Solar activity has been very low in the past 24 hours, with the strongest event being a C1 flare taking place in NOAA AR 2021, 1827UT (peak time) on April 5. NOAA AR 2026 and 2030, which were the main possible source of flaring activity yesterday show less magnetic complexity today. Eruptive conditions should prevail in the next 48 hours, with a slight risk of an isolated M class flare from AR 2030. Geomagnetic activity was unsettled to active in the past 24 hours, with a short period of indeed active conditions at planetary levels from 09 to 15 UT on April 5th, due to the arrival of the CMEs of April 1st and/or April 2nd.We expect mostly quiet conditions for the next 48 hours, with periods of unsettled conditions possible within the next 24 hours. Current ACE observations show the signature of a magnetic cloud, related to one of the aforementioned CMEs.

Equipment: Coronado 90 +  Imaging Source DMK  + LX75
Processing: Photoshop, Avistack 300 frames
Date: 04/06/14
Time UT: 14:00
Exposure 1/500 sec.

With SPONLI Space is getting closer


Fresh Tiger Stripes on Saturn’s Enceladus

Image Credit: Cassini Imaging Team, SSI, JPL, ESA, NASA

Do underground oceans vent through the tiger stripes on Saturn’s moon Enceladus? Long features dubbed tiger stripes are known to be spewing ice from the moon’s icy interior into space, creating a cloud of fine ice particles over the moon’s South Pole and creating Saturn’s mysterious E-ring. Evidence for this has come from the robot Cassini spacecraft now orbiting Saturn. Pictured above, a high resolution image of Enceladus is shown from a close flyby. The unusual surface features dubbed tiger stripes are visible in false-color blue. Why Enceladus is active remains a mystery, as the neighboring moon Mimas, approximately the same size, appearsquite dead. Most recently, an analysis of slight gravity deviations has given an independent indication of underground oceans. Such research is particularly interesting since such oceans would be candidates to contain life.

NASA APOD 06-Apr-14

Propeller nebula in Cygnus

The Propeller Nebula seems to have been missed in many catalogs. While seeming relatively bright in widefield images, the fine detail is deceptively hard to bring out.

DWB111, or the “Propeller Nebula” is listed in the DWB catalog, a somewhat lesser-known document developed by H. R. Dickel, H.Wendker and J. H. Bieritz cataloging 193 distinct objects as part of their study of H-alpha emission nebula in the Cygnus X region of the sky. This nebula is also listed as Simeis 57 and MRSL 479.

Imaging telescopes or lenses: GSO Newton 8″ f/5
Imaging cameras: Canon EOS 350D / No filter
Mounts: Sky-Watcher EQ6 Syntreck
Guiding telescopes or lenses: GSO Viewfinder 8X50
Guiding cameras: Orion SSAG
Focal reducers: TS Koma Korrektor
Software: Iris, photoshop
Filters: Astronomik CLS CCD Filter
Dates: June 5, 2013
Frames: 37×480″
Integration: 4.9 hours

Author: Fredéric Segato

AstroPhotography of the day by SPONLI
6 Abril 2014