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
Battle of the Sun(s)
-
- Im an EXPERT!
- Posts: 225
- Joined: Tue Mar 16, 2021 2:01 am
- Has thanked: 171 times
- Been thanked: 252 times
Battle of the Sun(s)
- Attachments
-
- PSX_20210705_104840.jpg (677.74 KiB) Viewed 473 times
Last edited by SoumyadeepMukherjee on Mon Jul 05, 2021 5:57 am, edited 1 time in total.
- DeepSolar64
- Way More Fun to Share It!!
- Posts: 19065
- Joined: Thu Sep 05, 2019 12:19 am
- Location: Lowndesville S.C.
- Has thanked: 17849 times
- Been thanked: 16992 times
Re: Battle of the Sun(s)
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
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
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
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
" Way more fun to see it! "
-
- Im an EXPERT!
- Posts: 225
- Joined: Tue Mar 16, 2021 2:01 am
- Has thanked: 171 times
- Been thanked: 252 times
Re: Battle of the Sun(s)
Thank you for pointing it out. I have updated the description.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
- Montana
- Librarian
- Posts: 34722
- Joined: Mon Oct 17, 2011 5:25 pm
- Location: Cheshire, UK
- Has thanked: 17974 times
- Been thanked: 8906 times
-
- Im an EXPERT!
- Posts: 225
- Joined: Tue Mar 16, 2021 2:01 am
- Has thanked: 171 times
- Been thanked: 252 times
-
- Im an EXPERT!
- Posts: 225
- Joined: Tue Mar 16, 2021 2:01 am
- Has thanked: 171 times
- Been thanked: 252 times
- H-Alpha
- Almost There...
- Posts: 598
- Joined: Sun Feb 21, 2021 2:19 am
- Location: Vouliagmeni (South Athens suburbs), Greece
- Has thanked: 1674 times
- Been thanked: 982 times
Re: Battle of the Sun(s)
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
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
Alexandros
Lunt 130MT+1800BF, C8 Ultima PEC+AstroSolar, Skywatcher Mount EQ6-R Pro
Baader Solar Prism, ZEISS Abbe Barlow 2x, Celestron Barlow 2x Ultima Series
ZWO ASI290MM, ZWO ASI1600MM Pro,
Greece
Lunt 130MT+1800BF, C8 Ultima PEC+AstroSolar, Skywatcher Mount EQ6-R Pro
Baader Solar Prism, ZEISS Abbe Barlow 2x, Celestron Barlow 2x Ultima Series
ZWO ASI290MM, ZWO ASI1600MM Pro,
Greece