Battle of the Sun(s)

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SoumyadeepMukherjee
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Battle of the Sun(s)

Post by SoumyadeepMukherjee »

Today, 5th July, marks the Aphelion, the day of the year when the sun is farthest from Earth. This image shows a comparison of the size between the sun in Perihelion (when Sun is closest to Earth) and Aphelion. Although the difference in their sizes is not as apparent as that of Moon in Perigee and Apogee, the Sun in Perihelion is 3% larger in the sky than the Sun in Aphelion (1 arcminute larger).

Both the images were taken with the same equipment at same focal length (600mm) from the same location (Kolkata, India).

Gear: Nikon D5600, Sigma 150-600c, Thousand Oaks Solar Filter (white-light)

Software: PIPP, Adobe Camera Raw, Photoshop

Date: 2nd January 2021 and 5th July 2021

Location: Kolkata, India
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PSX_20210705_104840.jpg
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Last edited by SoumyadeepMukherjee on Mon Jul 05, 2021 5:57 am, edited 1 time in total.


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Re: Battle of the Sun(s)

Post by DeepSolar64 »

That should amount to 1 arc minute difference. Not 1 arc second.

That's neat that you were able to gauge the sun's size between perihelion and aphelion. I have wondered how I would do that myself.

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Re: Battle of the Sun(s)

Post by SoumyadeepMukherjee »

DeepSolar64 wrote: Mon Jul 05, 2021 5:46 am That should amount to 1 arc minute difference. Not 1 arc second.

That's neat that you were able to gauge the sun's size between perihelion and aphelion. I have wondered how I would do that myself.

James
Thank you for pointing it out. I have updated the description.


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Re: Battle of the Sun(s)

Post by Montana »

That's fabulous!! Happy Aphelion Day :)

:bow :hamster:

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Re: Battle of the Sun(s)

Post by p_zetner »

Thanks for presenting this interesting comparison.
Cheers.
Peter


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Re: Battle of the Sun(s)

Post by SoumyadeepMukherjee »

Montana wrote: Mon Jul 05, 2021 9:14 am That's fabulous!! Happy Aphelion Day :)

:bow :hamster:

Alexandra
Thank you and same to you 🙂🙂


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Re: Battle of the Sun(s)

Post by SoumyadeepMukherjee »

p_zetner wrote: Mon Jul 05, 2021 12:29 pm Thanks for presenting this interesting comparison.
Cheers.
Peter
Thank you Peter 🙂


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Re: Battle of the Sun(s)

Post by H-Alpha »

You are doing an excellent work!
Thanks a lot for sharing this. It is very beautiful, useful and educative!

Do you know when the next Perihelion is, just in case you have searched for it already? (the exact day)

Best wishes,
Alexandros


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