January Solar Challenge
- Montana
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January Solar Challenge
January is Perihelion month, the closest in our orbit to the Sun https://www.timeanddate.com/astronomy/p ... stice.html
Perihelion 4 January 2022 06:52 147,105,052 km Aphelion 4 July 2022 08:10 152,098,455 km
So what you need to do is take a full solar disc as close as you can to perihelion, then repeat this in July and compare. We will do this again in July.
Or, if have any images taken around 5 July 2021 23:27, then take another in January and show us your comparison of the size difference.
Here is one I took in 2010, I am sure I can do better (if I get to see the Sun soon
Perihelion 2010 by Alexandra Hart, on Flickr
Have fun and share your data here
Alexandra
Perihelion 4 January 2022 06:52 147,105,052 km Aphelion 4 July 2022 08:10 152,098,455 km
So what you need to do is take a full solar disc as close as you can to perihelion, then repeat this in July and compare. We will do this again in July.
Or, if have any images taken around 5 July 2021 23:27, then take another in January and show us your comparison of the size difference.
Here is one I took in 2010, I am sure I can do better (if I get to see the Sun soon
Perihelion 2010 by Alexandra Hart, on Flickr
Have fun and share your data here
Alexandra
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Re: January Solar Challenge
Likewise Alexandra, the way our weather here in the S.E.England has been going in Dec'21, not much chance of a glimpse, but hey who knows..
Terry
Terry
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Re: January Solar Challenge
I think seeing the sun might be the issue for me
Will have a look back on my website and see if i've imaged on perihelion day previously.
Will have a look back on my website and see if i've imaged on perihelion day previously.
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: January Solar Challenge
Not to worry, I don't think it matters too much the date, an image sometime in January will do then we can complete in July
Alexandra
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A Celestial Pizza
The image compares the sizes of sun and moon, the two largest celestial bodies in our sky. The four slices are from the year 2021 when these two celestial bodies were at their extreme sizes: largest and smallest. The moon at perigee appears larger the sun at perihelion. Also, the moon at apogee appears smaller than the sun at apohelion. The respective dates, their distance from earth and their angular diameter (in arcminutes) are mentioned in the image.
All the images were taken with the same camera (Nikon D5600) and same lens (Sigma 150-600c) at the same focal length (600mm).
Location: Kolkata, India
All the images were taken with the same camera (Nikon D5600) and same lens (Sigma 150-600c) at the same focal length (600mm).
Location: Kolkata, India
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- marktownley
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Re: A Celestial Pizza
Very nice! I've copied this to the January challenge section...
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: January Solar Challenge
That is absolutely fabulous!! I hadn't thought about comparing it to the Moon as well. I think this makes it very clear why every eclipse is so different!
Alexandra
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Re: January Solar Challenge
Thank you Alexandra! I too found it interesting while comparing the sizes of both the celestial bodies.
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Re: A Celestial Pizza
Thank you Mark!marktownley wrote: ↑Mon Jan 03, 2022 10:38 am Very nice! I've copied this to the January challenge section...
- DanielBrousseau
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Re: January Solar Challenge
Too much, bravo....
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Sherbrooke, Québec, Canada
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Re: January Solar Challenge
The moon being so much closer varies a bit more.
Lunt 8x32 SUNoculars
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Re: January Solar Challenge
COMPARISON IMAGES (SAME SCALE) SUN & MOON - Pedro RE'
http://pedroreastrophotography.com/sun_moon.html
SUN & MOON (20211216). TV101 F/5.4, Baader Solar Continuum filter, IRPass Filter, PGR GRASSHOPPER 3 GS3-U3-28S4M (SAME SCALE)
http://pedroreastrophotography.com/sun_moon.html
SUN & MOON (20211216). TV101 F/5.4, Baader Solar Continuum filter, IRPass Filter, PGR GRASSHOPPER 3 GS3-U3-28S4M (SAME SCALE)
Pedro Re'
https://pedroreastrophotography.com/
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Re: January Solar Challenge
Thanks Pedro surely you have a Sun and Sun 4th Jan 22 / July last year
Alexandra
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Re: January Solar Challenge
Here it is (SUN 20210103/20210723) - TV101 F/5.4 (3 lights)
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Re: January Solar Challenge
Pedro,
Yours are excellent illustrations of the size change of the Sun as seen from the closest and furthest points in Earth's orbit. And the Sun is certainly a bit bigger in apparent size than the moon is in your first picture.
GONG doesn't show much of, or any size change between aphelion and perihelion. They must adjust for it in their images.
James
Yours are excellent illustrations of the size change of the Sun as seen from the closest and furthest points in Earth's orbit. And the Sun is certainly a bit bigger in apparent size than the moon is in your first picture.
GONG doesn't show much of, or any size change between aphelion and perihelion. They must adjust for it in their images.
James
Lunt 8x32 SUNoculars
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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
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Re: January Solar Challenge
Amazing images, Pedro! A really unique way of comparing the sizes in the different wavelengths!
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Re: January Solar Challenge
Thanks (check out another comparison animated gif)SoumyadeepMukherjee wrote: ↑Tue Jan 11, 2022 6:32 amAmazing images, Pedro! A really unique way of comparing the sizes in the different wavelengths!
SUN (PERIHELION & APHELION) (20140105/20140702)
TV101 F/5.4, 2" Lunt Solar Wedge, LUNT 1200 CaK Module, PGR GRASSHOPPER 3
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Pedro Re'
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Re: January Solar Challenge
Excellent!pedro wrote: ↑Tue Jan 11, 2022 9:58 amThanks (check out another comparison animated gif)SoumyadeepMukherjee wrote: ↑Tue Jan 11, 2022 6:32 amAmazing images, Pedro! A really unique way of comparing the sizes in the different wavelengths!
SUN (PERIHELION & APHELION) (20140105/20140702)
TV101 F/5.4, 2" Lunt Solar Wedge, LUNT 1200 CaK Module, PGR GRASSHOPPER 3
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Re: January Solar Challenge
Excellent Pedro!!!
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
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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
Visual Observer
" Way more fun to see it! "
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
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Re: January Solar Challenge
Excellent comparison, Alexandra.
Would love to try something similar myself, but imaging the perihelion Sun is a bit challenging from my latitude.
Best regards,
Arne
Would love to try something similar myself, but imaging the perihelion Sun is a bit challenging from my latitude.
Best regards,
Arne
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Re: January Solar Challenge
I have never tried this with my own images, a nice challenge (especially as we seem to be permanently clouded over)
So these are my nearest dates
Robert
0118-perihelion-890 by Robert Arnold, on Flickr
So these are my nearest dates
Robert
0118-perihelion-890 by Robert Arnold, on Flickr
Last edited by robert on Tue Jan 18, 2022 3:21 pm, edited 1 time in total.
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
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Re: January Solar Challenge
The change in size shows easily, Robert. Nice!!
Lunt 8x32 SUNoculars
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" Way more fun to see it! "
Orion 70mm Solar Telescope
Celestron AstroMaster Alt/Az Mount
Meade Coronado SolarMax II 60 DS
Meade Coronado SolarMax II 90 DS
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Celestron NexStar 102GT with Altair solar wedge
Losmandy AZ8 Alt/Az Mount
Sky-Watcher AZGTI Alt-Az GoTo mount
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Re: January Solar Challenge
Thanks James. (I have made the image a bit smaller to fit a laptop screen better)
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
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Re: January Solar Challenge
Dear Alexandra and all,
this is my attempt. This image is of particular significance to me because the top half actually comes from the very first image I made with my Daystar Solar Scout DS (my first H-alpha telescope). So the image not only shows the difference between Aphelion and Perihelion, but also the progress I did in H-alpha imaging in just 6 months.
All the best, Daniele
this is my attempt. This image is of particular significance to me because the top half actually comes from the very first image I made with my Daystar Solar Scout DS (my first H-alpha telescope). So the image not only shows the difference between Aphelion and Perihelion, but also the progress I did in H-alpha imaging in just 6 months.
All the best, Daniele
Solar scopes: Daystar Solar Scout DS 60/930
80mm f6 achromatic refractor with Daystar Quark from the Solar Scout
Scope: Skywatcher Maksutov-Cassegrain 127/1500
Mount: Skywatcher AZ-GTi
Camera: Fujifilm X-T30
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Location: Montagnana, Padova, Italy
80mm f6 achromatic refractor with Daystar Quark from the Solar Scout
Scope: Skywatcher Maksutov-Cassegrain 127/1500
Mount: Skywatcher AZ-GTi
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Re: January Solar Challenge
Very nice!! Imaging is always a “ work in progress” it seems.
Lunt 8x32 SUNoculars
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Lunt, Coronado, TeleVue, Orion and Meade eyepieces
Visual Observer
" Way more fun to see it! "
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
Visual Observer
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Re: January Solar Challenge
I know this doesn't work for everyone, but here's a 'stereoscopic' view of the Sun at Perihelion and Aphelion. The trick is to get the images scaled on your screen to align with your left and right eye and then stare through the images so that your brain merges them together (don't cross your eyes- this is a common mistake and is the wrong way to view these types of images). Let your eyes relax, stare through and your brain will do the rest.
Anyhow, what you should see is the aphelion disk fall away to the distance with the perihelion disk in the foreground.
Intended as a bit of fun and a novel way to show the effect. I hope it works for you.
Stu.
Anyhow, what you should see is the aphelion disk fall away to the distance with the perihelion disk in the foreground.
Intended as a bit of fun and a novel way to show the effect. I hope it works for you.
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/
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Re: January Solar Challenge
Stu, I failed. Although I can easily see images in stereometric pictures with two white dots. In any case, both the photo and the idea are excellent!
Ivan
Ivan
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Re: January Solar Challenge
Not to worry, Ivan. It can be tricky to see the full effect. It seems to work best on a smartphone, sideways on, as the image scale seems better suited to the eyes.
Thanks for trying
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/