Solar cycle 25

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superiorstream
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Re: Solar cycle 25

Post by superiorstream »

Today session..... Between 9am to 12noon
In 540nm......blank sun, no sunspot.
In Cak..... 2782 is still visible as 2 bright regions.
A new bright region also come into view today.
In Ha double stack...... 2782 glow with similar profiles
as in Cak.
The new region that just rotated into view also glow brighter than the surrounding, but less dominantly as in cak. However, associated with it is a small prominence and also some faint filament.
Also several small prominence can be seen at various places on the round edge of the sun.
If you have time and clear sky, do take a look.

superiorstream
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Re: Solar cycle 25

Post by superiorstream »

As normal obs the sun....
In 540nm..... New sunspot 2783 just evolve from the southern belt edge. Not spectacular., only a small umbra-penumbra sunspot.
In Cak.... Both 2782 and 2783 showup with bright regions, with 2783 showing a dark core.
In double stack Ha....... Both 2782 and 2783 show up with bright regions, with few filaments near each of them. 2783 edge also has a sizable prominence beside it.
Besides these two, there is also a bright region in the northern belt with a short filament.
Overall still inactive sun with good showing only at Ha doublestack.

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yltansg
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Re: Solar cycle 25

Post by yltansg »

superiorstream wrote:
Wed Nov 18, 2020 2:59 pm
As normal obs the sun....
In 540nm..... New sunspot 2783 just evolve from the southern belt edge. Not spectacular., only a small umbra-penumbra sunspot.
In Cak.... Both 2782 and 2783 showup with bright regions, with 2783 showing a dark core.
In double stack Ha....... Both 2782 and 2783 show up with bright regions, with few filaments near each of them. 2783 edge also has a sizable prominence beside it.
2783 looks rather stable with no chance of flares.

Alfred

superiorstream
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Re: Solar cycle 25

Post by superiorstream »

Today's sun
At 540nm......2783 is an unimpressive small umbra-penumbra sunspot.
At Cak...... Both 2782 and 2783 show up as brighten regions. 2783 has a long brighten tail.
At Ha double stack...... More interesting view.
As usual, 2782 is nothing more than a brighten region but
2783 has a spot surrounded by brighten region and then further away a filament can be seen.
Also in the northern belt, a slightly bigger prominence is visible followed by a filament.

From the nature of the glow, its reasonable to conclude that activities are still low as most of the glow of 2782 and 2783 cannot be seen by the single stack. From the nature of spectra line, such glow are regions of higher temperatures. Flares should be visible by single stack....
and by 0.9A bandwidth Ha filters.
Hence I completely agree that 2783 run low chances of flare.

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yltansg
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Re: Solar cycle 25

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22Nov, 7:50am. Saw several micro flares in the vicinity of AR2783 in Calcium-K wavelength. Imaging window was very small. Clouds covered the Sun by the time I set up the H-Alpha equipment. Here is the Calcium-K high-resolution image of the sunspot.

Image

This active region is worth observing as it has potential for more flares. Coming into view soon will be 2 pair of active region roughly along the same latitude as AR2783 (Information from https://stereo.gsfc.nasa.gov/.

Alfred

superiorstream
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Re: Solar cycle 25

Post by superiorstream »

Thanks Alfred for the photo..... Interesting.
Same thing happened to me yesterday..... 21 nov 2020.
Just have enough time to shot Ha in the morning., thereafter cloudy then rain throughout.
Besides 2783,my double stack also indicates a active region in the northern belt with a spot that glow brightly.
Apparently, activities in the northern belt also on the rise.
Today, cant do any obs as its cloudy, then after noon, rain. Hope tomorrow weather is better.

superiorstream
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Re: Solar cycle 25

Post by superiorstream »

As expected, that bright region in the northern sun evolve into a spot...... Sunspot 2784.
Its really nice to see with ones own eye how sunspot evolve...... WITH A DOUBLE STACKED SCOPE.
Nice.

superiorstream
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Re: Solar cycle 25

Post by superiorstream »

2786 was hugh..... The whole group of sunspot fit into the diagonal of a rectange 400,000 km x 300,000km.
at 540nm. In Ha, the whitish glow region that s associated with this sunspot more than fill up that 400,000 x 300,000 km box with 2 eye shaped glow ring.
Fantastic sight.
2790 just rotated into view this morning. The associated glow region rises slightly above the sun at the edge, suggests that that sunspot will be bigger as more come into view.
All 3 view..... 540nm,Cak,Ha.....suggested that the southern belt is Full of activities., with a glowing white regions that failed to develop into sunspot.
The northern belt also got one glowing white region but failed to turn into a sunspot.
ITS REALLY A FANTASTIC SIGHT OVERALL.

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yltansg
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Re: Solar cycle 25

Post by yltansg »

An update from 1 Dec, 9am video session.

A Zoom-in photo of Sunspot 2786, taken with a Celestron C11 fitted with D-ERF and Quark Chromosphere filter in Hydrogen-Alpha wavelength, looking at the upper chromosphere
Image
Make a right click on the photo to see it in its full resolution.

This was the location of the sunspot, photo was from Spaceweather.com

Image

Alfred

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yltansg
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Re: Solar cycle 25

Post by yltansg »

Image

On 1 Dec 2020, I also took a photo of the same sunspot in Calcium-K wavelength looking at the light from calcium atoms in the lower chromosphere, See the difference in texture in the 2 wavelengths.

Alfred

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