Ca II K prominences 3rd January 2022

[Merlin66 (Ken)]

An exciting collection of proms visible this morning - MiniSHG Ca II K.
Enjoy!!

[Eris (Gerard)]

Wow, top shot Ken.

[Merlin66 (Ken)]

Gerard,
"When it's good it's very very good, when it's bad it's horrid"


Good setting of spectral focus and a bit of half decent seeing helps...

[Merlin66 (Ken)]

Here's the solar surface in Ca II K3.
A couple of small filaments to compliment the proms, and the disappearing active areas.

[Saturnine (Jeff)]

Excellent Ca 11 K prominence image, am amazed how well the proms show at that band pass.

[Eris (Gerard)]

Very nice capture Ken. Was this taken in combination with the L filter?

[Merlin66 (Ken)]

I've settled on the following for the Ca II imaging with the MiniSHG:


Astronomik L1 UV-IR filter + W47 (Violet) + an exit slit gap (gaffa tape strips on the camera window, about 70A wide)