Solar

Sunspot 2720

Sunspot 2720 has now appeared and seems to be developing quite rapidly.

“Spaceweather” says:

“New sunspot AR2720 is not only large, but also strange. Its magnetic polarity is reversed. The North and South ends of its enormous magnetic field are backwards compared to the norm for sunspots in the current solar cycle, decaying Solar Cycle 24. Could AR2720 be the first big sunspot of the next solar cycle, Solar Cycle 25, popping up now in the middle of solar minimum? Stay tuned for more information about this intriguing possibility after the current geomagnetic storm is over.”!

Yesterday’s prominence

Here is another stunning amateur image of the prominence I imaged yesterday:

http://spaceweathergallery.com/indiv_upload.php?upload_id=147458&PHPSESSID=kjnhr1vlr2u0i05h0ork83ha63

This time from Florida, and again with expensive glassware (6″ f/8 refractor + Quark)

I console myself that again, it wouldn’t go on a window-sill and be at instant readiness (“The best telescope is the one you use the most”). Doesn’t stop me sighing deeply – – -!

C’mon you Quarkers – put up some competition!

Prominence processing comparison 14/08/2018

Having been seriously impressed with this image of the prominence the other day acquired with a Lunt LS152

Sunspot AR2718

http://spaceweathergallery.com/indiv_upload.php?upload_id=147300&PHPSESSID=2m86lk4cf4gr18bhad16c2p4s5

I thought I would have another go at processing my window-sill image. I screwed down the alignment box size (in Registax 6) to 10 pixels and limited the processing to the prominence area. I then added a bit of Lucy-Richardson sharpening in GIMP. I think the extra aperture of the LS152 allows a much faster shutter speed, limiting the blur due to atmospheric wobble. The result is below.

Not as good as the LS152, of course.

There is also the small matter of a factor of 20-30 in the price of the optics of course – – – – Sigh!