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.
Post Reply
User avatar
yltansg
Posts: 397
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 »

This was another HQ image taken with a C11 (with full-aperture D-ERF) and a Solar Spectrum SUNA etalon. The SUNA is a relatively new product from Solar Spectrum. So far I have not seen any images taken by users using a SUNA fitted to a SCT. I will be testing it thoroughly.

Image

Don't forget to do a right click to see the image in its full resolution.

Comments are greatly appreciated.

Alfred
superiorstream
Posts: 1280
Joined: Mon Nov 03, 2008 4:45 pm

Re: Solar cycle 25

Post by superiorstream »

Glad to see solar observing promoting in schools. Great work Alfred.
As of this sunspot cycle, its quite disappointing as the sunspots are SMALL. Activities are low if compared to the previous cycle. Prominences are also small and long filaments are relatively rare.
As such, l am quite happy that l had bought almost full equipments during the last cycle and observed all those active activities. Next today's sun.
superiorstream
Posts: 1280
Joined: Mon Nov 03, 2008 4:45 pm

Re: Solar cycle 25

Post by superiorstream »

Sun, 1 Dec 2021.
In 540nm...... Sunspot 2899and 2900 visible as 3 sunspots at the edge of the southern belt. All three showed umbra with a small penumbra.
In the northern belt, only sunspot 2902 is visible to me as 3 ultra tiny spots with no penumbra.
I can't see 2901 and 2903 honestly.
In Cak...... 2901 and 2902 show up as bright regions in the northern belt and
2903, 2899 and 2900 show up as bright region with 2899 and 2900 with 3 spots. Also in between these 2 regions lies another bright region.
In Ha double stack...... In the northern belt, 2901 and 2902 show up as bright region and in between them 2 small filaments are visible.
In the southern belt, only 2899 and 2900 show up as a bright spotted region, the edge of which had a small but fat filament.
User avatar
yltansg
Posts: 397
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 »

superiorstream wrote: Thu Dec 02, 2021 1:32 am Glad to see solar observing promoting in schools. Great work Alfred.
As of this sunspot cycle, its quite disappointing as the sunspots are SMALL. Activities are low if compared to the previous cycle. Prominences are also small and long filaments are relatively rare.
As such, l am quite happy that l had bought almost full equipments during the last cycle and observed all those active activities. Next today's sun.
Thank you for your reply, Mr Chia.

So far, the Sun is behaving like NOAA's Space Weather prediction that Cycle 25 (current cycle) will be be a weak one, like the weak Cycle 24. Hopefully we can see more good size sunspots and activities near its peak in 2025. Like you, I have procured most of my equipment and looking forward to putting them to good use and also getting more students and members of the public excited about our Sun.

Alfred
User avatar
yltansg
Posts: 397
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 »

superiorstream wrote: Thu Dec 02, 2021 1:52 am Sun, 1 Dec 2021.
In 540nm...... Sunspot 2899and 2900 visible as 3 sunspots at the edge of the southern belt. All three showed umbra with a small penumbra.
In the northern belt, only sunspot 2902 is visible to me as 3 ultra tiny spots with no penumbra.
I can't see 2901 and 2903 honestly.
In Cak...... 2901 and 2902 show up as bright regions in the northern belt and
2903, 2899 and 2900 show up as bright region with 2899 and 2900 with 3 spots. Also in between these 2 regions lies another bright region.
In Ha double stack...... In the northern belt, 2901 and 2902 show up as bright region and in between them 2 small filaments are visible.
In the southern belt, only 2899 and 2900 show up as a bright spotted region, the edge of which had a small but fat filament.
Thanks for the report, Mr Chia.

Mr Chia and solar enthusiasts:

I only managed to do 1 imaging session on 28 Nov in the last 2 weeks. It was a very cloudy day and I was very glad to capture the following images in the vicinity of AR 2900:
Image

Image

The images were taken with a C11 (fitted with D-ERF) and Daystar Quark Chromosphere etalon.


Alfred
superiorstream
Posts: 1280
Joined: Mon Nov 03, 2008 4:45 pm

Re: Solar cycle 25

Post by superiorstream »

Hi Alfred
Unbeatable closeup Ha photos of the sun's sunspots and as expected...... With daystar equipments.
Thanks for sharing.
Post Reply