Small scale rapid changes in the solar chromosphere. 280mm scope.
- Valery
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Small scale rapid changes in the solar chromosphere. 280mm scope.
Hi all,
During all these boring solar minimum days we all looking for changes on the sun face, we awating new spots, new ARs.
But the sun ramains the same - almost featurless in small H-a telescopes. Not say about white light telescopes where the
sun's face just blank.
But let take a look at the sun's chromosphere through a bigger telescope, say, through a 280mm SCT equipped with a very
inexpensive H-a filter and full size DERF filter (for unwanted heat rejection) and fast video camera. Here, at a much larger scale,
we can see the sun with a resolution level not available before. When we observe the sun through small telescopes we can see
only large scale chnages with low time resolution. Now through a biffer scope we can see changes in small scale features.
Here are two photos taken through my trusty C11 and only two minutes apart. One can blink them to see how many changes can
be detected at such a level of detalization. Only two minutes apart!
Of course no such dramatic changes as in large sun spots groups and surrounding ARs, but stll much much more than can be
seen in small H-a telescopes even on a moderately active sun.
Thanks for looking and comments.
Valery Deryuzhin
During all these boring solar minimum days we all looking for changes on the sun face, we awating new spots, new ARs.
But the sun ramains the same - almost featurless in small H-a telescopes. Not say about white light telescopes where the
sun's face just blank.
But let take a look at the sun's chromosphere through a bigger telescope, say, through a 280mm SCT equipped with a very
inexpensive H-a filter and full size DERF filter (for unwanted heat rejection) and fast video camera. Here, at a much larger scale,
we can see the sun with a resolution level not available before. When we observe the sun through small telescopes we can see
only large scale chnages with low time resolution. Now through a biffer scope we can see changes in small scale features.
Here are two photos taken through my trusty C11 and only two minutes apart. One can blink them to see how many changes can
be detected at such a level of detalization. Only two minutes apart!
Of course no such dramatic changes as in large sun spots groups and surrounding ARs, but stll much much more than can be
seen in small H-a telescopes even on a moderately active sun.
Thanks for looking and comments.
Valery Deryuzhin
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"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.
- Montana
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Re: Small scale rapid changes in the solar chromosphere. 280mm scope.
Thankfully spicules are always changing rapidly over 10 minutes this would make a great spot the difference game
Alexandra
Alexandra
- marktownley
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Re: Small scale rapid changes in the solar chromosphere. 280mm scope.
Yup, quite a bit going on. Would make for an interesting animation at this scale. Sadly such seeing is beyond me...
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!
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Re: Small scale rapid changes in the solar chromosphere. 280mm scope.
Great example of the details a large scope can pull out Valery. Nice work
Brian
Brian
Brian Colville
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
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
- Valery
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Re: Small scale rapid changes in the solar chromosphere. 280mm scope.
The daytime seeing is quite different from the night seeing.marktownley wrote: ↑Sun Feb 03, 2019 1:13 pm Yup, quite a bit going on. Would make for an interesting animation at this scale. Sadly such seeing is beyond me...
Before I dived in to high res solar H-a imaging, I too was absolutely sure I will never catch such a seeing. Now I know when I can image the sun at high res with good chances for such a seeing: in days after some period after rainy weather, mostly clear, 3 - 6m/sec wind except north wind, 20 - 35 degree above horizon. And I do not use a SSM !
What is important too:
1. Excellent telescope optics and a quality DERF.
2. Precise focus.
3. Additional small DERF.
4. Metal tube of the SCT.
5. Luminous H-a filter. Better is a really narrow one.
6. Fast and low noise camera. 150fps or higher.
7. Patiece in hunting for best seeig moments. Patience, patience and patience. Never give up! SSM should help a lot.
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.
Re: Small scale rapid changes in the solar chromosphere. 280mm scope.
Valery,
Very detailed images and excellent processing makes it easy to see the differences two minutes can make. A visual merge of the images show very little has remained stationary. This illustrates why video captures should be kept short at this scale.
Thanks,
Phil
Very detailed images and excellent processing makes it easy to see the differences two minutes can make. A visual merge of the images show very little has remained stationary. This illustrates why video captures should be kept short at this scale.
Thanks,
Phil
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- Valery
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Re: Small scale rapid changes in the solar chromosphere. 280mm scope.
At a good seeing I usually use 10sec recording cadence, at average seeing - 15-20sec and at lower seeing - up to 35sec.Astrophil wrote: ↑Sun Feb 03, 2019 7:30 pm Valery,
Very detailed images and excellent processing makes it easy to see the differences two minutes can make. A visual merge of the images show very little has remained stationary. This illustrates why video captures should be kept short at this scale.
Thanks,
Phil
"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.
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Re: Small scale rapid changes in the solar chromosphere. 280mm scope.
Very nice images, Valery. The more you look the more you see...... lots going on.
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/
- Valery
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Re: Small scale rapid changes in the solar chromosphere. 280mm scope.
Thanks, Stu.
This year I will try image timelapse movies of the sun at high res. May be with 14" aperture.
But at least with 12".
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.
- marktownley
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Re: Small scale rapid changes in the solar chromosphere. 280mm scope.
That would be good Valery
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!