A tall flame and AR12814

this is the main message area for anything solar :)
Post Reply
User avatar
krakatoa1883
Almost There...
Almost There...
Posts: 1041
Joined: Sat Jun 11, 2016 9:41 am
Location: Mediolanum
Has thanked: 153 times
Been thanked: 496 times

A tall flame and AR12814

Post by krakatoa1883 »

Today a tall flame prominence is visible on the E limb, those who can shouldn't miss the view
2021-04-14-1026-Halpha-fulldisc proms.jpg
2021-04-14-1026-Halpha-fulldisc proms.jpg (48.69 KiB) Viewed 476 times
AR12814 in the southern hemisphere is growing although it is still of class B, it's more interesting in H-alpha than in visible light. Another small region is developing close to the SE limb and based on STEREO others will follow in the next days.

Thanks for looking!
Attachments
2021-04-14-0749-WL-fulldisc.jpg
2021-04-14-0749-WL-fulldisc.jpg (372.66 KiB) Viewed 476 times
2021-04-13-1113-Halpha-AR12814.jpg
2021-04-13-1113-Halpha-AR12814.jpg (124.73 KiB) Viewed 476 times


Raf
My solar images and reports with articles on solar equipment
User avatar
ffellah
Way More Fun to Share It!!
Way More Fun to Share It!!
Posts: 11171
Joined: Mon Oct 27, 2014 6:46 pm
Location: Westport, CT USA
Has thanked: 9144 times
Been thanked: 6025 times

Re: A tall flame and AR12814

Post by ffellah »

There are great, Raf. The close up is beautiful.

Franco


User avatar
arnedanielsen
Way More Fun to Share It!!
Way More Fun to Share It!!
Posts: 7285
Joined: Fri Apr 18, 2014 10:42 pm
Location: Vestby, Norway
Has thanked: 6181 times
Been thanked: 7142 times

Re: A tall flame and AR12814

Post by arnedanielsen »

Great work, Raf.

Best regards,
Arne


Best regards,
Arne
--
AstroBin: https://www.astrobin.com/users/arnedani/
User avatar
Martin_S
Way More Fun to Share It!!
Way More Fun to Share It!!
Posts: 1839
Joined: Sat Mar 16, 2019 12:34 am
Location: Brisbane , Australia
Has thanked: 979 times
Been thanked: 2992 times

Re: A tall flame and AR12814

Post by Martin_S »

Nice imaging Raf, the prominence looks interesting.

Martin


H alpha : ,Skywatcher 120mm F8 open frame refractor, a tilted 2" 7nm H-alpha filter as a sub energy rejection filter, Baader TZ4 telecentric focal extender, Player One energy rejection filter, Combo Quark Chromosphere, Naked PST etalon for double stacking, ASI74mm camera
User avatar
MAURITS
Way More Fun to Share It!!
Way More Fun to Share It!!
Posts: 8507
Joined: Tue Nov 27, 2018 4:37 pm
Location: Belgium
Has thanked: 2412 times
Been thanked: 4786 times
Contact:

Re: A tall flame and AR12814

Post by MAURITS »

Beautiful images Raf.


Regards,
Maurits

Vista del Cielo Observatory

www.vistadelcielo.be
User avatar
Radon86
Almost There...
Almost There...
Posts: 779
Joined: Sat Mar 23, 2019 10:05 pm
Has thanked: 745 times
Been thanked: 660 times

Re: A tall flame and AR12814

Post by Radon86 »

Hello Raffaello,
Great work, I like these images a lot. Including the 1st one. I never thought about a small scope like a 50mm. I have a similar guidescope, a Altair 60mm guide scope with a F ratio of (225/60)=3.75
I wonder if I could use with a Quark ?

1) Did you upgrade the focuser on your Evoguide 50mm, as I understand it is a helical focuser.

2) Also the ASI178mm, I have not seen that used so much. It has small 2.4 um pixels. Did you focal reduce this to get to critical sampling as of :

http://www.wilmslowastro.com/software/f ... D_Sampling
You would best focal reduce to about F9 with your 50mm scope and 2.4micron pixel size at H-alpha.


Thanks Raffaello,

Magnus


Solar: H-alpha": Quark Chromosphere filter; Baader white light filters
Scopes: Altair Astro Travel ED70mm (F 420mm, D=70mm);; Skywatcher 90mm (F 910mm D=90mm); GSO focuser;;Altair Astro 60mm guidescope (D=60mm,F=225mm)
Cameras: ASI120mm-S,ASI174mm
Mount: SW HEQ5 Pro, SW EQ3 Pro Synscan (SW = Skywatcher),Vixen Polarie tracker (portable setup)
Accessory: SW Auto-focuser
User avatar
Montana
Librarian
Librarian
Posts: 34560
Joined: Mon Oct 17, 2011 5:25 pm
Location: Cheshire, UK
Has thanked: 17667 times
Been thanked: 8789 times

Re: A tall flame and AR12814

Post by Montana »

Beautiful and clean images, a pleasure to view :bow :hamster:

Alexandra


User avatar
krakatoa1883
Almost There...
Almost There...
Posts: 1041
Joined: Sat Jun 11, 2016 9:41 am
Location: Mediolanum
Has thanked: 153 times
Been thanked: 496 times

Re: A tall flame and AR12814

Post by krakatoa1883 »

Thanks for your comments.
Boso36 wrote: Thu Apr 15, 2021 6:02 am) Did you upgrade the focuser on your Evoguide 50mm, as I understand it is a helical focuser.
2) Also the ASI178mm, I have not seen that used so much. It has small 2.4 um pixels. Did you focal reduce this to get to critical sampling as of :
Hi Magnus, you can see the setup in this discussion. The focuser is fine and smooth, I had just to replace the original eyepiece holder with a better one.

I am very happy of the 178 which is fine for full disc and in some instances also for hires. Having very small pixels it requires modest f/ratios and therefore the use of reducers as a 0.7x or 0.5x depending on the setup. For hires imaging a 174 would be a better alternative.


Raf
My solar images and reports with articles on solar equipment
User avatar
DeepSolar64
Way More Fun to Share It!!
Way More Fun to Share It!!
Posts: 18823
Joined: Thu Sep 05, 2019 12:19 am
Location: Lowndesville S.C.
Has thanked: 17572 times
Been thanked: 16693 times

Re: A tall flame and AR12814

Post by DeepSolar64 »

Very nice! I wish I could figure out how to get full discs with my Coronado SMII 90. Doesn't anyone make an optical element to half the focal length hence the magnification? Barlows/Powermates increase the FL hence doubling it or more.

Nice work on all three!

James


Lunt 8x32 SUNoculars
Orion 70mm Solar Telescope
Celestron AstroMaster Alt/Az Mount
Meade Coronado SolarMax II 60 DS
Meade Coronado SolarMax II 90 DS
Meade Coronado AZS Alt/Az Mount
Astro-Tech AT72EDII with Altair solar wedge
Celestron NexStar 102GT with Altair solar wedge
Losmandy AZ8 Alt/Az Mount
Sky-Watcher AZGTI Alt-Az GoTo mount
Cameras: ZWO ASI178MM, PGR Grasshopper, PGR Flea
Lunt, Coronado, TeleVue, Orion and Meade eyepieces

Image Visual Observer
" Way more fun to see it! "
User avatar
eroel
Way More Fun to Share It!!
Way More Fun to Share It!!
Posts: 9408
Joined: Mon Dec 19, 2011 10:45 pm
Location: México D.F.
Been thanked: 4904 times

Re: A tall flame and AR12814

Post by eroel »

Raf:
A very good session.
Best regards.
Eric.


User avatar
Carbon60
Way More Fun to Share It!!
Way More Fun to Share It!!
Posts: 14205
Joined: Wed Mar 07, 2012 12:33 pm
Location: Lancashire, UK
Has thanked: 8415 times
Been thanked: 8161 times

Re: A tall flame and AR12814

Post by Carbon60 »

Nice images, Raf.

Stu.


H-alpha, WL and Ca II K imaging kit for various image scales.
Fluxgate Magnetometers (1s and 150s Cadence).
Radio meteor detector.
More images at http://www.flickr.com/photos/solarcarbon60/
EGRAY_OBSERVATORY
Way More Fun to Share It!!
Way More Fun to Share It!!
Posts: 6871
Joined: Mon May 18, 2020 4:45 pm
Location: Essex, S.E.England
Been thanked: 4900 times

Re: A tall flame and AR12814

Post by EGRAY_OBSERVATORY »

FD's are normally captured using a Focal Reducer James.

Checkout the website https://astronomy.tools/calculators/field_of_view/ where it gives options including FR's etc.

Should answer your question - I hope ??

Regards
Terry


User avatar
krakatoa1883
Almost There...
Almost There...
Posts: 1041
Joined: Sat Jun 11, 2016 9:41 am
Location: Mediolanum
Has thanked: 153 times
Been thanked: 496 times

Re: A tall flame and AR12814

Post by krakatoa1883 »

Thanks for comments, much appreciated :)
DeepSolar64 wrote: Thu Apr 15, 2021 3:27 pmI wish I could figure out how to get full discs with my Coronado SMII 90. Doesn't anyone make an optical element to half the focal length hence the magnification?
James, you can make use of a reducer like these below
05x.jpg
05x.jpg (30.93 KiB) Viewed 355 times
screwed on the standard nose of my 178MM the left one gives 0.52x the right one 0.35x (although it too is labelled as 0.5x). More expensive (and less aberrated) reducers are available from few suppliers as Baader Planetarium, however for your first tests the above can be fine and are also cheap, which one is best for you depends on focal length and sampling.


Raf
My solar images and reports with articles on solar equipment
User avatar
DeepSolar64
Way More Fun to Share It!!
Way More Fun to Share It!!
Posts: 18823
Joined: Thu Sep 05, 2019 12:19 am
Location: Lowndesville S.C.
Has thanked: 17572 times
Been thanked: 16693 times

Re: A tall flame and AR12814

Post by DeepSolar64 »

Raf,
I will have to look around for a US dealer that carries these. Thanks. Where did you get these?

James


Lunt 8x32 SUNoculars
Orion 70mm Solar Telescope
Celestron AstroMaster Alt/Az Mount
Meade Coronado SolarMax II 60 DS
Meade Coronado SolarMax II 90 DS
Meade Coronado AZS Alt/Az Mount
Astro-Tech AT72EDII with Altair solar wedge
Celestron NexStar 102GT with Altair solar wedge
Losmandy AZ8 Alt/Az Mount
Sky-Watcher AZGTI Alt-Az GoTo mount
Cameras: ZWO ASI178MM, PGR Grasshopper, PGR Flea
Lunt, Coronado, TeleVue, Orion and Meade eyepieces

Image Visual Observer
" Way more fun to see it! "
User avatar
krakatoa1883
Almost There...
Almost There...
Posts: 1041
Joined: Sat Jun 11, 2016 9:41 am
Location: Mediolanum
Has thanked: 153 times
Been thanked: 496 times

Re: A tall flame and AR12814

Post by krakatoa1883 »

Simply go on ebay.com or Amazon and type "eyepiece focal reducer" in the search bar, otherwise you can find them from the usual dealers of eyepieces.


Raf
My solar images and reports with articles on solar equipment
User avatar
p_zetner
Way More Fun to Share It!!
Way More Fun to Share It!!
Posts: 1644
Joined: Sun Mar 18, 2012 4:59 pm
Location: Winnipeg, Manitoba, Canada
Has thanked: 166 times
Been thanked: 719 times

Re: A tall flame and AR12814

Post by p_zetner »

Very nice images, Raf.
Cheers.
Peter


Post Reply