Sun in K and CaH Sept. 5th & 6th
- krakatoa1883
- Almost There...
- Posts: 1041
- Joined: Sat Jun 11, 2016 9:41 am
- Location: Mediolanum
- Has thanked: 153 times
- Been thanked: 496 times
Sun in K and CaH Sept. 5th & 6th
Few images of yesterday and today of the Sun at short wavelengths, there are no major features to image therefore I am using my imaging time for experiments.
I can't do any better than the above with my current setup, so I definitively need a more narroband device(s) and a better corrected scope than my short achromat. For the latter I could use my Mewlon 210 with a front ERF, as suggested by Valery, but I have to consider if the mean seeing at my observing site would allow to make use of such a large aperture.
As suggested elsewhere I removed from my Baader K filter one of the two glasses and I have to admit that images are better defined in this way. Also I replaced the defective BF of my Quark with the same K filter and an Astronomik UV/IR cut (but I left the blue glass in place and removed only the clear glass). The system works fine and this mod solved some problems of unevenness in my images.I can't do any better than the above with my current setup, so I definitively need a more narroband device(s) and a better corrected scope than my short achromat. For the latter I could use my Mewlon 210 with a front ERF, as suggested by Valery, but I have to consider if the mean seeing at my observing site would allow to make use of such a large aperture.
Raf
My solar images and reports with articles on solar equipment
My solar images and reports with articles on solar equipment
- Carbon60
- Way More Fun to Share It!!
- Posts: 14211
- Joined: Wed Mar 07, 2012 12:33 pm
- Location: Lancashire, UK
- Has thanked: 8420 times
- Been thanked: 8173 times
Re: Sun in K and CaH Sept. 5th & 6th
Very nice images, Raf. Lovely granulation and hi-res CaH.
Stu.
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/
Fluxgate Magnetometers (1s and 150s Cadence).
Radio meteor detector.
More images at http://www.flickr.com/photos/solarcarbon60/
- ffellah
- Way More Fun to Share It!!
- Posts: 11176
- Joined: Mon Oct 27, 2014 6:46 pm
- Location: Westport, CT USA
- Has thanked: 9149 times
- Been thanked: 6030 times
- krakatoa1883
- Almost There...
- Posts: 1041
- Joined: Sat Jun 11, 2016 9:41 am
- Location: Mediolanum
- Has thanked: 153 times
- Been thanked: 496 times
Re: Sun in K and CaH Sept. 5th & 6th
Thanks Franco and Stu, this spotless Sun is really boring, I think I'll stop imaging granulation and calcium features for some time now
Raf
My solar images and reports with articles on solar equipment
My solar images and reports with articles on solar equipment
- Montana
- Librarian
- Posts: 34563
- Joined: Mon Oct 17, 2011 5:25 pm
- Location: Cheshire, UK
- Has thanked: 17672 times
- Been thanked: 8795 times
Re: Sun in K and CaH Sept. 5th & 6th
Wow! these are lovely pics
Can I ask what exactly you did to your Baader K line? I find I cannot use mine as it is optically blurred and I wondered if this was a potential way to fix it?
Alexandra
Can I ask what exactly you did to your Baader K line? I find I cannot use mine as it is optically blurred and I wondered if this was a potential way to fix it?
Alexandra
- Valery
- Way More Fun to Share It!!
- Posts: 4059
- Joined: Sun Nov 18, 2012 3:13 pm
- Has thanked: 156 times
- Been thanked: 893 times
Re: Sun in K and CaH Sept. 5th & 6th
This is true for for images taken with small telescopes and respectively at small scales. With 8" and up telescopes images at 393nm (contimuum) and especially Ca K/H are full of interesting details. Short living filigrees and pores (also short living) at 393nm and great dramatism at CaK and CaH.krakatoa1883 wrote: ↑Fri Sep 07, 2018 8:58 am Thanks Franco and Stu, this spotless Sun is really boring, I think I'll stop imaging granulation and calcium features for some time now
If to stay with 100m telescope, then yes, these years of sun minimum are boring. The easiest way is to stop, yes.
Here is the image taken with C9,25" telescope when testing a new 240mm DERF filter. This is one of many similar areas on the sun every day.
Valery
- Attachments
-
- 2018 Aust 29 05h50m C9,25 PST CaK etalon.png (926.39 KiB) Viewed 2310 times
Last edited by Valery on Fri Sep 07, 2018 2:39 pm, edited 1 time in total.
"Solar H alpha activity is the most dynamic and compelling thing you can see in a telescope, so spend accordingly." (c) Bob Yoesle.
Largest full size 185 - 356mm Dielectric Energy Rejection Filters (D-ERF) by ARIES Instruments.
Largest full size 185 - 356mm Dielectric Energy Rejection Filters (D-ERF) by ARIES Instruments.
- krakatoa1883
- Almost There...
- Posts: 1041
- Joined: Sat Jun 11, 2016 9:41 am
- Location: Mediolanum
- Has thanked: 153 times
- Been thanked: 496 times
Re: Sun in K and CaH Sept. 5th & 6th
Yes, Valery, I know the limitations of a 100 mm aperture and that there are lot of details to be imaged with larger apertures. However before to purchase a front ERF for my Mewlon I am trying to better evaluate the average seeing at my location in order to be sure that is worth the expense, should I conclude positively on this I'll make this step in the very near future
Alexandra, as you know Baader K line is actually composed by two glasses, the upper one tilted to the other by means of a plastic spacer which is thicker on one side. As I now use it mainly as a part of my Quark BF I removed one of the glasses and I noted that sharpness increased through it. Moreover in this way the front thread of the filter barrel remains free for further stacking.
Alexandra, as you know Baader K line is actually composed by two glasses, the upper one tilted to the other by means of a plastic spacer which is thicker on one side. As I now use it mainly as a part of my Quark BF I removed one of the glasses and I noted that sharpness increased through it. Moreover in this way the front thread of the filter barrel remains free for further stacking.
Raf
My solar images and reports with articles on solar equipment
My solar images and reports with articles on solar equipment
- marktownley
- Librarian
- Posts: 42280
- Joined: Tue Oct 18, 2011 5:27 pm
- Location: Brierley Hills, UK
- Has thanked: 20448 times
- Been thanked: 10254 times
- Contact:
Re: Sun in K and CaH Sept. 5th & 6th
Lovely images throughout the thread. Interesting as to your mods Raf.
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!
- robert
- Way More Fun to Share It!!
- Posts: 3069
- Joined: Fri Oct 14, 2011 1:49 pm
- Location: N.W.Scotland
- Has thanked: 4 times
- Been thanked: 1275 times
- Contact:
Re: Sun in K and CaH Sept. 5th & 6th
Great results and I think your seeing must be good to get granulation like that with 130mm aperture. No boring at all!
Robert
Robert
images and animations http://tinyurl.com/h5bgoso
2024 images https://www.flickr.com/photos/69734017@ ... 0313830045
2023 images https://www.flickr.com/photos/69734017@ ... 0304905278
ED80. ED100. Celestron-150mm-PST mod. C8 edge. ES127
LS60PT-LS60F-B1200. B600-Cak. PGR-Ch3-IMX265
2024 images https://www.flickr.com/photos/69734017@ ... 0313830045
2023 images https://www.flickr.com/photos/69734017@ ... 0304905278
ED80. ED100. Celestron-150mm-PST mod. C8 edge. ES127
LS60PT-LS60F-B1200. B600-Cak. PGR-Ch3-IMX265
- krakatoa1883
- Almost There...
- Posts: 1041
- Joined: Sat Jun 11, 2016 9:41 am
- Location: Mediolanum
- Has thanked: 153 times
- Been thanked: 496 times
Re: Sun in K and CaH Sept. 5th & 6th
Thanks Alexandra, Mark, Robert.
@Robert: at my location seeing is good for imaging granulation in K line until about 2 hours from sunrise then quickly deteriorates and only H alpha or continuum imaging is possible. In summer the sky is also slightly hazy and this makes images noisy if the Sun is not enough high.
@Robert: at my location seeing is good for imaging granulation in K line until about 2 hours from sunrise then quickly deteriorates and only H alpha or continuum imaging is possible. In summer the sky is also slightly hazy and this makes images noisy if the Sun is not enough high.
Raf
My solar images and reports with articles on solar equipment
My solar images and reports with articles on solar equipment
- Valery
- Way More Fun to Share It!!
- Posts: 4059
- Joined: Sun Nov 18, 2012 3:13 pm
- Has thanked: 156 times
- Been thanked: 893 times
Re: Sun in K and CaH Sept. 5th & 6th
The same is here.krakatoa1883 wrote: ↑Sun Sep 09, 2018 10:15 am Thanks Alexandra, Mark, Robert.
@Robert: at my location seeing is good for imaging granulation in K line until about 2 hours from sunrise then quickly deteriorates and only H alpha or continuum imaging is possible. In summer the sky is also slightly hazy and this makes images noisy if the Sun is not enough high.
Valery
"Solar H alpha activity is the most dynamic and compelling thing you can see in a telescope, so spend accordingly." (c) Bob Yoesle.
Largest full size 185 - 356mm Dielectric Energy Rejection Filters (D-ERF) by ARIES Instruments.
Largest full size 185 - 356mm Dielectric Energy Rejection Filters (D-ERF) by ARIES Instruments.
- eroel
- 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: Sun in K and CaH Sept. 5th & 6th
Raf:
Super images and nice modifications in your setup.
At home my biggest aperture scope is the 102mm f/9 Meade and the 102mm f/7 Stellarvue, as also the Solarmax 90-DS., so I am getting to the same point you are now, though at the rural observatory I have a 6" f/12 refractor and catadiopric scopes up to 12", so I better start imaging the Sun with bigger scopes.
Best regards,
Eric.
Super images and nice modifications in your setup.
At home my biggest aperture scope is the 102mm f/9 Meade and the 102mm f/7 Stellarvue, as also the Solarmax 90-DS., so I am getting to the same point you are now, though at the rural observatory I have a 6" f/12 refractor and catadiopric scopes up to 12", so I better start imaging the Sun with bigger scopes.
Best regards,
Eric.
- krakatoa1883
- Almost There...
- Posts: 1041
- Joined: Sat Jun 11, 2016 9:41 am
- Location: Mediolanum
- Has thanked: 153 times
- Been thanked: 496 times
Re: Sun in K and CaH Sept. 5th & 6th
Thanks Eric. In a rural location you should be able to enjoy a better seeing than mine as I live in a large city and only rarely I move my scopes. My larger instrument is a 210 mm Takahashi Mewlon.
Raf
My solar images and reports with articles on solar equipment
My solar images and reports with articles on solar equipment
- Valery
- Way More Fun to Share It!!
- Posts: 4059
- Joined: Sun Nov 18, 2012 3:13 pm
- Has thanked: 156 times
- Been thanked: 893 times
Re: Sun in K and CaH Sept. 5th & 6th
I live in a 400.000 city and my scope is at about 1.3m above ground level. I can meet good enough seeing several times in a months (warm season) and only between 1,5 - 2 hours from the sunrise for CaK and up to 2.5 hours for H-a.krakatoa1883 wrote: ↑Sun Sep 09, 2018 4:22 pm Thanks Eric. In a rural location you should be able to enjoy a better seeing than mine as I live in a large city and only rarely I move my scopes. My larger instrument is a 210 mm Takahashi Mewlon.
BTW 210mm in CaK is a very powerfull instrument - like C14 in H-a !!!
"Solar H alpha activity is the most dynamic and compelling thing you can see in a telescope, so spend accordingly." (c) Bob Yoesle.
Largest full size 185 - 356mm Dielectric Energy Rejection Filters (D-ERF) by ARIES Instruments.
Largest full size 185 - 356mm Dielectric Energy Rejection Filters (D-ERF) by ARIES Instruments.