www.astrocafe.hk

Just a re-processing of the CaK images taken on 28/2, 2/3 and 3/3.

What is the time interval?

willis 寫:What is the time interval?

3 days. You can ask your students to work out the rotational period of the sun!

Are you adjust the rotation axis manually to up right?
Why the image looks a bit out focus? Is that the seeing really that bad?

P.S: Long time didn't visit and have a detail look on astrocafe already....

universe24 寫:Are you adjust the rotation axis manually to up right?
Why the image looks a bit out focus? Is that the seeing really that bad?

Yes, all done manually, hence it is far from perfect!
Seeing was very bad on 2/3 and 3/3. Even low magnification shots are no good.