Sunday, 12 May 2019
AR12741 with the Daystar Sodium Quark - 12th May
Swapping out the Lunt wedge for the Daystar sodium Quark I decided to get a closeup of this pair of active regions. AR12741 was sporting a nice light bridge. The Quark is better than the wedge in the poorer seeing conditions, but 80mm aperture really was the limit of what this afternoon was allowing me to use.
White Light Full Disk - 12th May
With a couple of sunspots visible I decided to get out the Lunt Solar wedge with the Skywatcher ED80 and FLIR GH3 ICX814 camera. Been quite a while since i've done a whitelight shot!
Monday, 6 May 2019
Coronal Holes and Bright Points 4th May
Whilst this may appear to be a seemingly innocuous region of the sun with little or nothing happening it actually tells a story of features not seen in visible light. The two bright points mark the boundary of a coronal hole. A coronal hole has open magnetic field lines, and at it's boundary the sun has closed magnetic field lines, this produces a magnetic potential which gives the possibility of activity forming on the boundary line. While not ephemeral regions, these bright points represent an area where magnetic field lines are emanating from the surface of the sun. Taken with the Coronado SM90 double stacked with the Daystar Quark along with the FLIR GH3 ICX814 camera.
Sunday, 5 May 2019
AR12740 in CaK 4th May
Taken with the Skywatcher Ed80 stopped down to 60mm AR12740 seems to still have some more activity in it as it rounds the face of the sun. Double click on the picture to see the larger version. Both prominences and the spicule ring are easily seen in this image taken with the Homebrew CaK filter, this has recently been tweaked to improve contrast in Calcium light.
AR12740 in Ha - 4th March
Taken with the Coronado SM90 double stacked with a Daystar Quark this image shows the turbulent plage associated with AR12740 as it rounds the sun for a second time. Over the coming days the active region will become more geoeffective and will put on a better show for solar observers.
CaK Full Disk 4th May
The great CaK experiment continues to reduce continuum leakage through this home brew filter and increase contrast. It is working to some effect with the spicule ring and proms both being visible in the larger version of this image (double click to see). Taken with the ED80 stopped down to 60mm for seeing conditions and improved control over spherical aberration.
Ha Full Disks - 4th May
A couple of full disk images from Saturday: First off taken at prime focus with the SM90 and ICX814 camera, secondly with a Lunt50 etalon double stacked with a Daystar Quark. Notice how features like filaments are more easily visible with the double stacked setup.
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