Thursdays Hazy Start to the Day - 16th May

this is the main message area for anything solar :)
Post Reply
User avatar
marktownley
Librarian
Librarian
Posts: 25503
Joined: Tue Oct 18, 2011 5:27 pm
Location: Brierley Hills, UK
Contact:

Thursdays Hazy Start to the Day - 16th May

Post by marktownley » Thu May 16, 2019 7:42 pm

We've been having a lovely week of early summer sunshine this week, but this morning there was a distinct high cloud / haze to the air, more noticeable nearer the horizon. Compared to previous days it meant the suns image on the laptop screen was lower in contrast. However a rare thing for me to have so many sun days in a row! Image taken with the Lunt50 etalon on the ED60 f6 scope with a 2.5x barlow and the FLIR GH3 916M camera. Sadly looks like the sunshine is at an end for a while now! Oh well!

ImageHa-FD-Ss-bw by Mark Townley, on Flickr

ImageHa-FD-Ss-colour by Mark Townley, on Flickr

Mark
Image
http://brierleyhillsolar.blogspot.co.uk/
Solar images, a collection of all the most up to date live solar data on the web, imaging & processing tutorials - please take a look!

User avatar
David_The_Bears_Fan
Im an EXPERT!
Im an EXPERT!
Posts: 495
Joined: Sun Jun 29, 2014 6:45 pm
Location: Banbury, UK

Re: Thursdays Hazy Start to the Day - 16th May

Post by David_The_Bears_Fan » Thu May 16, 2019 9:55 pm

Good shot Mark. Conditions equally poor here this morning. Cloud forecast for a few days now so I can go back to crawling out of bed just in time for work again :D
David

Kit: Skywatcher Evostar 120 on Celestron CG-4 / Coronado PST / Lunt B1200 Ca-K Module / Lacerta Herschel Wedge/ Canon 1100D & 77D / ZWO ASI178MM & 120MC-S / QHY5-II Mono

User avatar
ffellah
Way More Fun to Share It!!
Way More Fun to Share It!!
Posts: 2577
Joined: Mon Oct 27, 2014 6:46 pm
Location: Westport, CT USA

Re: Thursdays Hazy Start to the Day - 16th May

Post by ffellah » Thu May 16, 2019 10:18 pm

These are great, Mark ! Even with the haze you captured great detail: when you enlarge the images, you can actually see the fine detail of the surface and AR2741.

Franco

RodAstro
Oh, I get it now!
Oh, I get it now!
Posts: 45
Joined: Sun Oct 29, 2017 9:51 pm

Re: Thursdays Hazy Start to the Day - 16th May

Post by RodAstro » Thu May 16, 2019 10:31 pm

Very nice detailed images Mark
Do you think that the haze actually works in our favor much like for planetary imaging and viewing?
When it is hazy much more of the atmosphere is stable, this makes for better frame rates and although the contrast is a little lower it is much easier to get good focus. It has been known for many years this is the best time for planetary work just wondering if could be so for solar as well your images seem to show its not detrimental anyway.

User avatar
p_zetner
Almost There...
Almost There...
Posts: 941
Joined: Sun Mar 18, 2012 4:59 pm
Location: Winnipeg, Manitoba, Canada

Re: Thursdays Hazy Start to the Day - 16th May

Post by p_zetner » Thu May 16, 2019 11:14 pm

Nice shots, Mark. They do stand up well under magnification.
@RodAstro: I wonder if a little haze is beneficial. It does seem to be associated with less turbulence. In the end, though, I guess there is some sacrifice of fine detail.
Cheers.
Peter

RodAstro
Oh, I get it now!
Oh, I get it now!
Posts: 45
Joined: Sun Oct 29, 2017 9:51 pm

Re: Thursdays Hazy Start to the Day - 16th May

Post by RodAstro » Fri May 17, 2019 12:13 am

Hi Peter
It is and always has been an interesting argument this one.
Many visual planetary observers preferred slightly hazy seeing because of the stable air that comes along with it, their reason for this is you record what is actually there and not fleeting glances of your imagination.
This argument stood up well when lucky imaging (as it is now called) came along, as some observers who made fantastic detailed drawings were then proved wrong.
Or are they? as their argument goes that these fine glimpses of detail are lost anyway during stacking in preference for the stronger details.
I do agree with you though there must be some loss of fine detail if you imagine it like using a soft focus filter on a camera lens, if it was never there you can never tease it out.
But does the ease of focusing and the fact you can collect many more frames with good focus and undistorted features in a shorter time compensate for this and if so to what degree?
Cheers
Rod

User avatar
Montana
Way More Fun to Share It!!
Way More Fun to Share It!!
Posts: 20400
Joined: Mon Oct 17, 2011 5:25 pm
Location: Cheshire, UK

Re: Thursdays Hazy Start to the Day - 16th May

Post by Montana » Fri May 17, 2019 9:32 am

Beautiful full discs Mark, I think this week has been superb weatherwise and lucky with an active sun too :hamster:

Alexandra

User avatar
MAURITS
Almost There...
Almost There...
Posts: 551
Joined: Tue Nov 27, 2018 4:37 pm
Location: Belgium
Contact:

Re: Thursdays Hazy Start to the Day - 16th May

Post by MAURITS » Fri May 17, 2019 1:00 pm

Great images Mark.
Regards,
Maurits

Vista del Cielo Observatory

www.vistadelcielo.be

User avatar
eroel
Way More Fun to Share It!!
Way More Fun to Share It!!
Posts: 4529
Joined: Mon Dec 19, 2011 10:45 pm
Location: México D.F.

Re: Thursdays Hazy Start to the Day - 16th May

Post by eroel » Fri May 17, 2019 1:53 pm

Mark:
Clean and crisp FD´s.
Have a nice weekend.
Eric.

User avatar
marktownley
Librarian
Librarian
Posts: 25503
Joined: Tue Oct 18, 2011 5:27 pm
Location: Brierley Hills, UK
Contact:

Re: Thursdays Hazy Start to the Day - 16th May

Post by marktownley » Sat May 18, 2019 10:20 am

Thanks everyone! A bit of haze in my experience can stabilise the seeing, however for me the transparency has to be consistent, if it is variable then it becomes a royal PITA.
Image
http://brierleyhillsolar.blogspot.co.uk/
Solar images, a collection of all the most up to date live solar data on the web, imaging & processing tutorials - please take a look!


RodAstro
Oh, I get it now!
Oh, I get it now!
Posts: 45
Joined: Sun Oct 29, 2017 9:51 pm

Re: Thursdays Hazy Start to the Day - 16th May

Post by RodAstro » Sun May 19, 2019 5:59 pm

Hi Mark
I totally get the transparency issue, not as much of a problem with a smaller object like a planet but the sun being so large can have many moving brightness across it that sometimes the staking software cannot cope with.
Varying transparency is a major problem here in the Peak District as all the aircraft in the world seem to leave their contrails criss crossing the sky. :mad:

Post Reply

Who is online

Users browsing this forum: Bing [Bot], David_The_Bears_Fan and 0 guests