I thought we might see some chromosphere/prominence activity as 2736 disappeared around the solar limb – but there isn’t much.
Roger Samworth
AR2736 development
AR2736 has developed rapidly, unusual, since we haven’t seen a decent sunspot for a while.
“Spaceweather” says:
“A few days ago, sunspot AR2736 didn’t exist. Now, the rapidly-growing active region stretches across more than 100,000 km of the solar surface and contains multiple dark cores larger than Earth. Moreover, it has a complicated magnetic field that is crackling with C-class solar flares.”
The images are fairly poor due to the extreme acute angle with the double glazing!
“Electronic eyepiece” Visual experience – – – more
I have now mounted the screen (with Velcro) on the scope mount, which seems the best place for it. Last night’s almost full moon was on display, so here are some photos of the screen, Obviously nothing like as good as proper imaging, but it IS a computer-free visual experience!
The first one is with a focal reducer, the second straight into the camera, and the last two with a X2 barlow.
Sun today – – – 21/03/2019
Spot AR3726 continues to develop.
AR2736 flare – – -20/03/2019
According to “Spaceweather”:
“New sunspot AR2736 is growing rapidly in the sun’s northern hemisphere. This morning at 1118 UT, it announced itself with a C4-class solar flare.”
Here is a fade animation of the AR2735 / AR2736 spot group pre and post this morning’s flare. The earlier image was at 09:38 UT taken with light cloud cover, the later one at 11:40 UT.
Sun today – – -20/03/2019
Spot AR 2735 and the new very active region.
Animation is a gradual transform from Ha to white light, as if traversing the chromosphere.
Window-sill astronomy
To all you doubters out there, there is an article on this subject in April’s Sky at Night magazine – – -!
The article says “Observing through a closed window is not recommended due to reflections and distortions”
RUBBISH!!!
A closed window prevents air currents and that is much better than an open window. If you are in a dark room and the telescope objective is close to the window the “reflections and distortions” are minimised.
Take a look at some of my window-sill images if you don’t believe that!
Sun today – – – 17/03/2019
Although we are near solar minimum, there was quite a nice selection of solar features this morning. Prominences of various sorts, a filament and some active regions.
Sun today – – -14/03/2019
Only fleeting glimpses of our nearest star today, between holes in the clouds. However, the “instant availability” of the window-sill observatory enabled these interesting prominences to be imaged.
