Wobbly Wednesday 25th March
Posted: Thu Mar 26, 2020 8:08 am
We've had clear skies all week here for days now, and a lack of planes means there are no contrails and the sky is blue not milky. This is really good for CaK imaging and even at the scale of todays images (60mm) the spicule ring around the sun is visible, even if not well resolved. The seeing though on wednesday was not good with the temperature rising from below freezing to mid teens celcius over several hours, and for the CaK certainly, I would have probably got better results with my 40mm scope.
Cak-FD-bw by Mark Townley, on Flickr
Cak-FD-colour by Mark Townley, on Flickr
Closeups were with the 60mm and 3x barlow, IMX174 chipped camera.
cak-ne-limb-bw by Mark Townley, on Flickr
cak-ne-limb-colour by Mark Townley, on Flickr
cak-w-limb-bw by Mark Townley, on Flickr
cak-w-limb-colour by Mark Townley, on Flickr
One constant is the ability of the double stacked 50mm Ha setup to cut through whatever seeing durge is thrown at it, and yesterday was no exception. The disk is quiet! But there were a few temporal emerging flux regions.
Ha-FD-DS-bw by Mark Townley, on Flickr
Ha-FD-DS-colour by Mark Townley, on Flickr
Turning to the SM90 double stacked with the Quark, I was fighting the seeing with the increased exposure but this shot of the flux regions came out ok.
mid-disk-ds90-bw by Mark Townley, on Flickr
mid-disk-ds90-colour by Mark Townley, on Flickr
Realising I was going nowhere quickly with the DS90 I dropped down into single stacked mode, a 2.5x barlow and the IMX174 camera again, ramping up the gain and keeping the exposure short cut through the seeing to my surprise and yesterdays proms revealed themselves in glory.
prom-NE-bw by Mark Townley, on Flickr
prom-NE-colour by Mark Townley, on Flickr
prom-sw-bw by Mark Townley, on Flickr
prom-sw-colour by Mark Townley, on Flickr
prom-w-bw by Mark Townley, on Flickr
prom-w-colour by Mark Townley, on Flickr
Phew, managed to get them all processed and up here before todays session starts. Lets see what it brings!
Mark
Cak-FD-bw by Mark Townley, on Flickr
Cak-FD-colour by Mark Townley, on Flickr
Closeups were with the 60mm and 3x barlow, IMX174 chipped camera.
cak-ne-limb-bw by Mark Townley, on Flickr
cak-ne-limb-colour by Mark Townley, on Flickr
cak-w-limb-bw by Mark Townley, on Flickr
cak-w-limb-colour by Mark Townley, on Flickr
One constant is the ability of the double stacked 50mm Ha setup to cut through whatever seeing durge is thrown at it, and yesterday was no exception. The disk is quiet! But there were a few temporal emerging flux regions.
Ha-FD-DS-bw by Mark Townley, on Flickr
Ha-FD-DS-colour by Mark Townley, on Flickr
Turning to the SM90 double stacked with the Quark, I was fighting the seeing with the increased exposure but this shot of the flux regions came out ok.
mid-disk-ds90-bw by Mark Townley, on Flickr
mid-disk-ds90-colour by Mark Townley, on Flickr
Realising I was going nowhere quickly with the DS90 I dropped down into single stacked mode, a 2.5x barlow and the IMX174 camera again, ramping up the gain and keeping the exposure short cut through the seeing to my surprise and yesterdays proms revealed themselves in glory.
prom-NE-bw by Mark Townley, on Flickr
prom-NE-colour by Mark Townley, on Flickr
prom-sw-bw by Mark Townley, on Flickr
prom-sw-colour by Mark Townley, on Flickr
prom-w-bw by Mark Townley, on Flickr
prom-w-colour by Mark Townley, on Flickr
Phew, managed to get them all processed and up here before todays session starts. Lets see what it brings!
Mark