Monday, 12 April 2021

AR12814 in CaK - 12th April

AR12814-CaK-colour I imaged at 50mm f40 with the IMX174 camera for this image in an attempt to try and work within the less than ideal seeing conditions, seems to have worked ok as this image shows. The SDO has been down and NASA seems somewhat reluctant to designate it as an active region, but there are quite clearly a number of spots within it, and activity has picked up since the day before. Pleased with the scale of this image given comnditions in the late afternoon sunshine.

CaK Full Disk 12th April

CaK-FD-bw I wasn't able to observe today until 5pm, by which time there was cumulus cloud scudding around and having a detrimental effect on seeing. As a result I decided to go for this disk at 50mm f20 which seemed to reign things in a bit and give a reasonable result.

Sunday, 11 April 2021

New Sunspot - AR12814 in CaK - 11th April

AR12814-CaK-colour A new active region is forming on the sun as can be seen in the image above. Taken with the 100mm scope at f40 with the homebrew CaK filter and IMX174 camera. I was able to shoot an animation that spans a period of 4 minutes and shows just how dynamic our sun actually is! cak-ani-1 Very pleased with how todays images have all come out!

CaK Full Disk 11th April

CaK-FD-colour A new active region is forming on the sun as can be seen on this disk overview. Taken with 60mm f16.

CaK Full Disk 10th April

CaK-FD-colour Things are pretty quiet on the sun at the moment as this full disk overview shows, although the proms and chromospheric fringe can be see well in this image. Taken with the home brew CaK filer with the 60mm scope at f16.

Plage in Calcium Light 10th April

cak-plage-colour Emerging-region-cak-colour Conditions weren't great but I went for a closeup of this plage on the surface of the sun, the last image looks to be developing into something a bit more active. Taken with the 100mm at f40 with the home brew CaK filter and the IMX174 camera.

Wednesday, 7 April 2021

Decaying Plage in CaK 6th April

magnetic-region-CaK-close-bw This small area of activity had died down a bit by the 6th April, but a few days before it was sporting a few pores. Sadly it didn't develop into anything more substantial. The seeing was surprisingly better than both I expected or forecast first thing, so I decided to chance it and have a go with the 100mm scope at f46, shooting 6000 frame avis I figured would give me enough raw data to work with, and this is indeed the case. This image shows the fluffy cloud like view that you get with on band closeup CAK views, showing a height somewhere between 1000-2000km up in the chromosphere. I pretty pleased with the results as day to day conditions mean getting hi-res images like this are quite hard to come by.

AR12813 in CaK 6th April

ar12813-cak-close-colour I took a close up view of AR12813 in CaK, this active region is slowly but surely decaying away as it approaches the suns western limb, but it has had some activity over the last several days. Taken with the 100mm at f46 using the homebrew CaK filter and the PGR Grasshopper IMX174 camera.

Plage Activity on The NE Limb in CaK 6th April

NE-limb-cak-close-colour I could see a small patch of bright plage forming on the suns north eastern limb so decided to take a closer look at it in Calcium light at 100mm f46 using the IMX174 camera. Sadly the region didn't develop into anything more significant.

CaK Full Disk 6th April

CaK-FD-colour The sun is still very quiet at all wavelengths at the moment all bar a few patches of plage. This disk was taken with the 60mm at f16 using the home brew CaK filter.

CaK Full Disk 5th April

CaK-FD-bw The seeing really wasn't up to muc, but it did give me a chance to play with the setup and tuning of my calcium filter, which gives improved contrast now. Taken at 60mm f16, when the tuning is right on the filter the contrast really pops out, making the surface darker and the bright points brighter. The chromospheric fringe and prominences are also easier to see when the filter is on band.

Ha Full Disk 5th April

Ha-FD-DS-colour The sun is quiet at the moment, a few very samll slightluy active patches and the usual filaments in polar regions. Hopefully things will pick up soon! Taken with the DS50 setup.

Tuesday, 6 April 2021

CaK Full Disk - 4th April

CaK-FD-colour There were nice views of the suns full disk today in CaK wavelengths taken with the 60mm f16 scope.

Disturbed Plage in The Southern Hemisphere - Ha & CaK - 4th July

Old-plage-ha-120-colour old-plage-cak-120-colour Disturbed plage and not much else seemed to be the theme of the sun on the 4th April as these 2 images show. Taken with the 120mm scope at f28 with the Daystar Quark, home brew CaK filter and the PGR Grasshopped IMX camera. I like to be able to image both wavelengths at the same scale as I feel this gives good comparison. Need to be able to do this in Na wavelengths too...

Plage on the Eastern Limb - Ha & CaK 4th April

New-plage-Ha-120-colour new-plage-cak-120-colour Both these small areas of plage on the eastern limb never really developed into anything all bar an occasional pore here and there. Taken with the 120mm scope at f28 using a Daystar Quark, home brew CaK filter and the PGR Grasshopped IMX174 camera.

AR12813 in Ha & CaK - 4th April

New-AR-Ha-120-colour New-AR-Cak-120-colour Seeing was unusually good firth thing on the morning of the 4th of April and I was able to catch this small active region in both Ha and CaK at 120mm f26 using a Daystar Quark, homebrew CaK filter and the PGR Grasshopper IMX174 camera.

Ha From 3rd April

new-ar-ha-bw northern-filament-bw southern-filament-bw Using the DS90 I was able to get some closer views of what little activity there was in Ha. Taken at f25 with the PGR Grasshopper IMX174 camera.  Processed using NAFE software, something i'm currently exploring the use of.

Calcium Shots From 3rd April

CaK-south-plage-colour east-ar-cak-colour new-ar-cak-colour Seeing was far from great but I did manage to get some CaK shots at 60mm f28 with the IMX174 camera.

Saturday, 27 March 2021

CaK Full Disk 27th March

CaK-FD-BW-HG-colour It was the briefest of windows on Saturday morning before the clouds rolled in, but I managed to get a quick CaK full disk at 60mm f16. Nice to see the spicule ring around the edge, double click for a full size view!

Monday, 22 March 2021

AR12811 in Ha 21st March

ARs-Ha-colour It's nice to see activity ramping up on the sun, and the DS90 is a great setup for showing this activity, seen in this shot taken at f25 with the IMX174 camera. These new active regions have rounded the limb and are looking rather nice with plenty to see. I was fighting the seeing at this aperture, but lots of frames seemed to work. Just need the weather to improve a bit now we have moved into spring with the sun higher in the sky!

Filaments! 21st March

filaments-colour As the suns magnetic fields start to build up in strength as it slowly ramps up activity in this new solar cycle, the boundary of these magnetic fields is marked by darker filaments, clouds of cooler plasma held in place by magnetic fields. Taken with the DS90 at f25 with the IMX174 camera.

Ha Full Disk 21st March

Ha-FD-colour Quite pleased to have got this full disk on Sunday, as it looked like the clouds weren't going to budge at all, but by late afternoon they suddenly shifted. Taken with the DS50 setup it was nice to see some activity starting to brew up on the sun.

Sunday, 21 March 2021

CaK Disk Through The Clouds - 20th March

CaK-FD-colour Saturday was predominantly cloudy, however diffuse shadows appeared late in the afternoon so I decided to see what could be seen through the clouds. I had to use 2x2 binning and have the camera gain 3/4 the way up to get an image on the screen, but this just about worked! Including the cloud haze around the disk the new active region and it's attendant spot can be seen that has just rounded the limb. Taken with the Coronado sm40 with a 2x Cemax barlow. I think I will be lucky if I get any cloud breaks on the Sunday too!

Saturday, 20 March 2021

CaK Full Disk 17th March

CaK-FD-colour I was able get home slightly earlier than usual from work on the 17th, and fortunately the endless grey skies had cleared earlier in the afternoon to reveal the blue above. The sun was only 4-5 degrees above the horizon when I took this image and as a result atmospheric extinction was a problem, however, 2x2 binning with the camera came to the rescue of the light levels, even if the resultant image is under sampled. Still, it shows the larger main features well, and also hints at the plentiful proms that were easily visible as a result of good air transparency. It was just nice to get some sun in!

Ha Full Disk 17th March

Ha-FD-SS-colour No time for the Quark to heat up for a double stack view, instead just using the Lunt 50 etalon for a single stack view of the sun that was only a few degrees above the horizon when this image was taken. Despite being only single stack the main features and activity came out quite nicely. It was a good day for the proms!

Sunday, 14 March 2021

CaK Full Disk 14th March

cak-fd-colour Sundays weather forecast did exactly what it said it would... Started off clear at sunrise, steadily clouding over before rain came in. Fortunately my new piers position means I can see the sun just after 8am at this time of year, so I made a point of getting out early before the weather window closed in. MeteoBlue was saying seeing aound 1.6", so I decided to give CaK at 60mm a try, it seemed to work and given the hazy conditions with poor transparency i'm pleased how this image came out.

Ha Closeups 7th March

ars-ha-q60-colour plage-q60-colour Given the poor conditions with boiling seeing I decided to try a new configuaration to try and get some results from the day in Ha. Using the ED80 stopped down to 60mm to give me f10, I used the Airylab 2.8x telecentric to give an overall f28 at the Quark and the IMX174 camera. I ended up having capture 4000 frame runs to get some usable data, but on the whole these have worked and gives me a small aperture setup to use when the seeing conditions just aren't working for the larger apertures.

Ha Full Disk 7th March

ha-fd-ds50-colour Even with the 50mm DS setup I was fighting the poor seeing conditions in the late afternoon sunshine, I had hoped to use the DS90, but looking through this visually the sun had a saw tooth edge to it, so, very little point in trying to use the larger scope.

CaK Closeups 7th March

new-ar-cak40-colour ars-cak40-colour A closer look at the 2 regions of activity, with the 40mm f10 scope, 3x barlow and the IMX174 camera. It's nice to see the sun slowly but surely waking up in cycle 25 finally!

CaK Full Disk 7th March

cak-fd-colour Seeing wasn't great so resorted to the 40mm f10 scope along with the 2x cemax barlow for this full disk.

Wednesday, 3 March 2021

CaK Full Disk - 2nd March

CaK-FD-colour An unexpected break of the low cloud late on Tuesday afternoon meant I was able to grab a quick image of the sun when I got back from work. To my surprise the sun was birthing 2 new active regions. Taken with the 40mm f10 and a 2x Cemax barlow along with the home brew CaK filter. The sun was low and I needed to use 2x binning to bring the exposure time back up.

Solar Sunday - 28th February

For the 3rd day in a row (must be a record!) the day dawned sunny and clear, and I was keen to observe. Starting at around 9am with the 120mm scope at f28 for Ha, and again found myself fighting the seeing which was deteriorating by the minute. First off our departing active region and a bit of aggressive post processing to try and claw something back. ar12804-ha-colour I did a quick scoot around the limb for the proms as the disk itself was pretty blank. prom-1 prom-3 prom-4 Switching down to the 50mm double stack setup was giving better outcomes in the turbulent atmosphere. Ha-FD-DS50-bw And a look round at the areas of activity: filaprom-colour ar12805-ha-DS50-colour ar12804-HA-DS50-colour An hour or two later and after a bit of lunch and the sun out of the trees and I decided to have a look in Cak, using the 40mm scope. First off the full disk and the good sky transparency was ideal for CaK proms. CaK-FD-colour efr-cak-colour ar12805-cak-colour ar12804-cak-colour