Solar cycle 25

Alright, this is for sharing of your observation experience. Or, if you are arranging gatherings, star-gazing expeditions or just want some company to go observing together, you can shout it out here.
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yltansg
Posts: 388
Joined: Mon Aug 31, 2009 3:35 pm
Favourite scope: Borg 76 + Solar Scope SF50
Location: Bukit Batok

Re: Solar cycle 25

Post by yltansg »

Adding a pseudo-coloured image of AR2871:

Image

Cheers.

Alfred
vernonfarmer39
Posts: 2
Joined: Wed Oct 06, 2021 1:32 am
Favourite scope: Celestron Nextron 8SE

Re: Solar cycle 25

Post by vernonfarmer39 »

yltansg wrote: Fri Sep 24, 2021 7:55 pm Adding a pseudo-coloured image of AR2871:

Image

Cheers.

Alfred
wow! what a beautiful one! how did you capture this one?
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yltansg
Posts: 388
Joined: Mon Aug 31, 2009 3:35 pm
Favourite scope: Borg 76 + Solar Scope SF50
Location: Bukit Batok

Re: Solar cycle 25

Post by yltansg »

Hi Vernonfarmer39,

The image was taken using a Celestron C11 fitted with a D-ERF, a Daystar Quark Chromosphere and a Basler ace acA1920-155um camera.

Image

I also have other setups for Calcium-K and other image scale captures: https://www.epj-conferences.org/article ... _01002.pdf

Alfred
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yltansg
Posts: 388
Joined: Mon Aug 31, 2009 3:35 pm
Favourite scope: Borg 76 + Solar Scope SF50
Location: Bukit Batok

Re: Solar cycle 25

Post by yltansg »

8 Oct 21, A survey in Calcium-K wavelength. AR2882 started as a stable Active Region, after discharging a few C-Class flares this week has evolved into a restless AR with 'beta-gamma' magnetic field with energy for M-Class flares.
This is an image from Solar Dynamic Observatory: Image

This image was taken with my Celestron C-11 SCT, coloured in Photoshop:
Image

And in original grey-scale, which provides greater resolution:
Image

Please do a right-click to see the images in their full resolution.

Enjoy.

Alfred
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