Sodium Full Disk 6th August

I remembered yesterday evening I can use the Na Quark for full disks, and ever the optimist and despite looking on the AIA1700 image first thing and seeing yesterdays pores had gone, I still had a go at a full disk, and you know what - the solar dynamics observatory was right, there were no pores or spots remaining. A blank sodium disk then - one day some spots I promise!

Ha Full Disk - 6th August

Up early as usual, we're in unsettled air with jet stream Atlantic weather blowing in, and experience suggests there's normally a brief window of clear skies just after dawn and just before the heat of the sun gets convection going and clouds bubbling up. This was indeed the case and only had enough time for a couple of full disks, first off things in Ha with my preferred setup of Lunt50 etalon, 60mm f6 scope, Daystar Quark, 0.7x solar telecompressor and FLIR GH3 ICX916M camera. Where we had the emerging flux region yesterday seems to have quietened right back down now, but is still quite bright compared to the background disk. A few brighter points in lower southern latitudes mark the tell tale sign of the cycle 25 jet stream, and a few very small proms and filaments are about it for today.

Emerging Flux Regions - 5th August

There were 2 small emerging flux regions visible today on out star.  At its height the EFR on the right also sported small pores where the flux tubes broke through the photosphere, in Ha and higher up in the chromosphere they manifest as darker and cooler regions of plasma that arc and follow the magnetic field lines.  Taken with the Coronado SM90ii double stacked with the Daystar Quark and the FLIR GH3 ICX916M camera.

Old Active Region Remnants - 5th August

If you look back on this website in the archives to April this year you will see we had some quite large active regions gracing the solar equator.  Now, several rotations later this region of turbulent plage is all that remains.  Will it be visible in 2 weeks time when the area rounds the limb again?  Who knows?  Taken with the Coronado SM90 double stacked with the Daystar Quark.

Northern Polar Regions 5th August

While there may appear at first glance that not much is going on in this image, the bright patches of polar faculae, normally associated as white light features of the photosphere, here they also shine through the chromosphere as bright points.  Polar faculae are more prominent during solar minimum.  Taken with the Coronado SM90 double stacked with the Daystar Quark.

Ha Full Disk - 5th August

Another one of those days when Spaceweather says the sun is blank; but it isn't.  Two emerging flux regions can be seen in equatorial regions not long after coming over the limb, also on the opposite limb the region of turbulent plage that marks where active regions were visible back much earlier in spring.  Taken with a Lunt 50 etalon double stacked with the Daystar Quark.

Sale of Solar Items!

Having a good clear out of some solar stuff i've not used for a while, so it's the solar summer sale.  Check out my listings on SolarChat 

https://solarchatforum.com/viewforum.php?f=11