01/09/2020 Visual Report

[AndiesHandyHandies]

Hi

I observed with the 90mm 600fl Triplet this morning and my two Quark Filters and two barlows.

09.45 BST Clear slight haze Still

4.2x Prom Quark 32mm Meade SP

08.30 o'Clock Arch prom looks like a dog with head to the top

08.35 Wide jet with flared top

08.40 Thin jet curved up with broad base

02.00 Little spike

02.30 Little curved down jet

02.45 Thin jet pointing up 45deg.

03.00 Seperated double jet. Kink up and then tall jet. Two faint jets up.


10.15 BST 3x Revelation ED long Barlow. 25mm Clave'

08.30 o'Clock Arch with a single feed and two double feeds. Little bump on the top. Curving down to a single feed.
More detail in the arch and blacker background.

08.35 Jet with double feed. A bar 45deg down in upward direction.

08.40 Jet with hollow top. Little spike curving up.

03.00 Bright seperated jet. Diffuse hedge going up above bar. Two church spires above the hedge. Thin jet from the top of the hedge not as tall as the spires.

05.00 Faint jet with bar on the right. Two bulbous bits.

Changed to Chrom Quark with 4.2x and 32mm Meade SP. Black background.

08.30 o'Clock Arch. Bright central feed with two dim ones either side.
Diffuse arch with dark bump
Down to single brightish feed with blob
Blob 'head' A dumpy triangle

08.35 Dual feed with the top seperated. Diffuse over.

08.40 Hint of diffuse

03.00 Dim all over. Seperated jet. (Aircraft in field)
Twin jets and jet above.

Could see surface granulation. A horizontal dark feature under 01.00

06.00 I could see a dark triangle base just off the inside edge of the Sun. Right was a shorter feed.
With prom leaning to the right over the Suns edge.
First real detail seen on the surface with the Chrom Quark but not looked a lot.

Less prom details in the Chrom. But better granulation on the surface.

Changed to the Relelation 3x barlow with the Chrom Quark.
11.10 BST 25mm Clave

Prominent 'sweet spot' in the centre. Granulation not as contrasty.

The horizontal bar under 01.00 was still visible.

08.30 o'Clock Diffuse feed. Bright spike above. Dumpy arch with bump. Arch down single feed with bright blob. Seperate head blob.

08.35 Dim jet

08.40 Very faint hint.

03.00 Faint.

03.00 Tried 32mm Meade SP for brighter image and the features were visible faintly.

Went back to the 3x and Prom Quark. Compared the 25mm Clave' and 25mm Fujiyama and detail looked similar.

Conclusion to use the 3x Revelation with the Chrom Quark with a 25mm as darker background and better detail
and
the 4.2x with the Chrom Quark with the 32mm. Any tips on getting better detail in the granulation?

Means no swapping of the Quark nose-pieces.

Cheers. Andrew.

[DeepSolar64]

Very nice report Andrew. Very detailed.

[EGRAY_OBSERVATORY]

Thanks for your report Andrew

Terry

[marktownley]

Thanks for the report Andrew. Granulation is a feature in WL not Ha, so not sure what features you're referring to. To get better contrast drop the aperture on your scope - the native f6.6 is a little fast, and the faster the scope the wider the resultant bandpass of the etalon will be (with poorer contrast), I always found f7.5/f8 to be a nice figure with my Quark in terms of contrast.

[AndiesHandyHandies]

Hi Mark,

Thanks for the tip on aperture and FNo. What aperture is best at the recommended FNo?

Is there a difference between the Prominence and Chromosphere Quarks in terms of best aperture and FNo?

I see darker dots across the Sun is what I mean.

Cheers. Andrew.

[Montana]

I was going to ask whether you meant granulation (photosphere) or mottles/spicules (chromosphere). A chromosphere quark is supposed to have a darker and more contrast on the surface (lower bandpass), the prominence quark is a wider bandpass and thus brighter (more photospheric leakage) so the surface is less contrasty but the prominences are brighter.

Alexandra

[marktownley]

Thanks for the tip on aperture and FNo. What aperture is best at the recommended FNo?

Try stopping down to 75mm / 80mm.

[DeepSolar64]

I was going to ask whether you meant granulation (photosphere) or mottles/spicules (chromosphere). A chromosphere quark is supposed to have a darker and more contrast on the surface (lower bandpass), the prominence quark is a wider bandpass and thus brighter (more photospheric leakage) so the surface is less contrasty but the prominences are brighter.

Alexandra

I can see someone confusing the mottles for granulation. Like granulation is to the photosphere the mottles is to the chromosphere. They cover practically the whole disc.