The usual websites tell me the sun is blank, well that just depends what wavelength you're looking in. The active region mid disk has plenty going on, just no sunspots. Given it is possible to see the magnetic field lines in the plasma indicating 2 poles the lack of spots means the field strength is less than 1500 Gauss, generally accepted as the minimum for sunspot formation.
This double stacked view was taken with a Lunt50 etalon on the ED60 scope, stepping down to 50mm gives a nice f7 light cone which is then fed into the daystar Quark. The end result is a nice contrasty view. Camera used was the IMX249 chipped PGR.
ar-and-limb-bw by Mark Townley, on Flickr
ar-and-limb-colour by Mark Townley, on Flickr
ar-close-bw by Mark Townley, on Flickr
ar-close-colour by Mark Townley, on Flickr
Given i'm running at just 50mm aperture i'm pretty pleased with the results.
Hope you like.
Mark
The Blank Sun? 14th July
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The Blank Sun? 14th July
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Re: The Blank Sun? 14th July
They are excellent Mark.
Best wishes,
David
Best wishes,
David
Making the possible difficult and the difficult impossible.
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Re: The Blank Sun? 14th July
Excellent images, Markmarktownley wrote: ↑Sat Jul 14, 2018 1:53 pm The usual websites tell me the sun is blank, well that just depends what wavelength you're looking in. The active region mid disk has plenty going on, just no sunspots.
Mark
Too bad you didn't make the image in the CaK line! CaK will be even more dramatic/impressive.
Valery
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Re: The Blank Sun? 14th July
Great results Mark
I also did a few FD images during half time of the world cup match
I also did a few FD images during half time of the world cup match
Pedro Re'
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Re: The Blank Sun? 14th July
Hi Mark,
nice images. That area showed some small spots in WL en Solar Continuum. Made some images but they are not that good due to very bad seeing. Can't upload them now because I am doing some maintenance on my main computer.
Regards,
Paul
nice images. That area showed some small spots in WL en Solar Continuum. Made some images but they are not that good due to very bad seeing. Can't upload them now because I am doing some maintenance on my main computer.
Regards,
Paul
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Re: The Blank Sun? 14th July
Great shots Mark
Brian
Brian
Brian Colville
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ASI1600MM, ASI432MM, ASI294MM Pro, ASI174MM, ASI462MM
Maple Ridge Observatory
Cambray, ON Canada
Photos: https://www.flickr.com/photos/185395281@N08/albums
10'x15 Roll-off Roof Observatory
Takahashi EM400 Mount carrying:
C14 + Lunt 80ED
Deep Sky Work - ASI294MM Pro+EFW 7x36/Canon 60D (Ha mod), ONAG
Planetary Work - SBIG CFW10, ASI462MM
2.2m Diameter Dome
iOptron CEM70G Mount carrying:
Orion EON 130ED, f7 OTA for Day & Night Use
Ha Setup: Lunt LS80PT/LS75FHa/B1200Ha + Home Brew Lunt Double Stack/B1800Ha on the Orion OTA + Daystar Quantum
WL, G-Band & CaK Setup: Lunt Wedge & Lunt B1800CaK, Baader K-Line and Altair 2nm G-Band filter
ASI1600MM, ASI432MM, ASI294MM Pro, ASI174MM, ASI462MM
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Re: The Blank Sun? 14th July
Thanks for your kind words everyone!
http://brierleyhillsolar.blogspot.co.uk/
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Re: The Blank Sun? 14th July
You certainly do get some lovely, clean and detailed images from the 50mm I could do with getting more out of my 40mm
Alexandra
Alexandra