Monday 31 August 2020

Cycle 25 Plage in CaK - 30th August

A close up of the region of cycle 25 plage taken with the 100mm Tal Refractor at f28, using the Airylab telecentric, homebrew CaK filter and the FLIR IMX174 camera.  The seeing was just on the limit for the aperture used and I had to take a lot of frames to get a usable image from them out of the other end.

CaK Full Disk 30th August

The sun is quiet at the moment apart from a region of cycle 25 plage in the northern hemisphere.  Scope used was 60mm aperture with f16 at both the filter and also the camera.

Proms! 30th August

prom-1 prom-2 prom-3
Taken using the 118mm refractor at f28 using the Daystar Quark and the PGR FLIR IMX 174 camera.  There were lots of nice prominences visible on the sun on Sunday!

Monday 3 August 2020

A Trio of Active Regions 3rd August

Cycle 25 really is coming alive and for the first time in years we have three active regions lined up in a row.  It was nice to see so much bright plage on what has been a quiet sun for too long.  Taken with the Coronado SM90 double stacked with the Daystar Quark, Airylab 2.7x telecentric and the FLIR Grasshopper IMX174 camera.

AR12769 & AR12770 in Ha With the Airylab HaT 3rd August

I was pleased to be able to frame both active regions in one shot with this image taken earlier this morning.  The new active region on the limb was showing one spot when imaged, however looking later in the day there is actually a pair of decent sized spots.  The new active region appears to be quite dynamic and there was surging going on when the area was imaged.  Taken with the 8" Airylab HaT, 2.7x Airylab telecentric, Daystar Quark and FLIR IMX174 camera.  Pleased with how this image came out as my seeing doesn't usually support these larger apertures.

AR12768 in Ha with the HaT - 3rd August

The seeing was obliging first thing this morning and so I decided to give the 8" Airylab HaT a run to see what I could get on the cycle 25 activity we have at the moment.  Conditions were just about holding up using this aperture and I was using.  The Daystar Quark and an IMX174 camera was used to image.  I was surprised at how much bright plage there still was in this quite rapidly decaying active region.

Ha Full Disk 3rd August

The sun really is starting to pick up in terms of activity as can be seen on todays full disk image.  Taken with a Lunt 50mm etalon on a 60mm f6 scope and double stacked with the Daystar Quark.

AR12768 & AR12769 in CaK 2nd August

I was very lucky to catch excellent seeing first thing on Sunday morning before the clouds rolled in.  Both these active regions have very small sunspots which suggests a relatively low magnetic field strength, however, we are only just at the start of cycle 25.  Taken with the 100mm Tal refractor at f27 with the Airylab 2.7x telecentric and the FLIR IMX174 camera.  There is lots of fine detail in these images when viewed full size!

AR12767 in CaK 2nd August

Glad to have caught this small sunspot just before it headed over the limb, probably wont see it re-emerge in 2 weeks time, but there may be some plage that returns.  Taken with the 100mm scope at f27 and the FLIR IMX174 camera.

CaK Full Disk 2nd August

Activity is really starting to pick up again on the sun as can be seen in this overview calcium image with all the bright areas of plage.  Taken with the 60mm f16 scope and the ICX814 chipped camera.

Saturday 1 August 2020

Flame Proms and Coronal Rain 31st July

As I came to the close of yesterdays imaging session I couldn't resist a go at imaging the flame prom that has been around for the past couple of days.  I managed 8 individual images before the hard disk was full, and after processing to my surprise was the considerable amount of movement of plasma in the individual frames.  At nearly 200,000km high this prominence showed quite active coronal rain falling back towards the solar surface.  Taken with the 118mm scope at f27, with a daystar Quark and a FLIR IMX174 Grasshopper 3 camera.

AR12768 in CaK 31st July

Taken with the 118mm scope at f27 (127mm scope stopped down to 118mm to give f10, and then 2.7x telecentric) I was keen to remind myself how this performed at these shorter wavelengths.  It is considerably softer than my 100mm Tal, but it does just about work, at 656nm it is a much stronger performer and does well when the seeing allows it.  I still think a 150mm f8 scope stopped down to 120mm would give better results and this is on the radar of my shopping list.

AR12768 in Ha 31st July

This active region appears to be slowly dying back, with the sunspots getting smaller, however it's magnetic influence still occupies a good portion of sun.  Taken with the 118mm scope at f27 with the Daystar Quark and IMX174 camera.

Ha Full Disk 30th July

I seem to have sorted out the issue of pinched optics on the 60mm f6 donor scope that I use for my full disks, and now the whole of the sun remains in focus which is good.  It's nice to see so much activity on here for a change and is a sure sign that cycle 25 is slowly but surely kicking in with more activity.  Taken with the 50mm Lunt etalon on the 60/f6 and then double stacked with a Daystar Quark to increase contrast and bring out detail.

AR12768 in Ha 30th July

This active region while only having a very small collection of small sunspots in it, certainly covers a decent area on the sun indicating the magnetic fields are they just not very strong.  This image was taken with the 118mm scope at f27 which gives nice results and nice image scale, especially when the seeing cooperates.

AR12767 in Ha 30th July

There's not much life in this sunspot, but it is the start of cycle 25 so is only to be expected. Taken with the 118mm at f27 with the IMX174 camera.